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1.  A Case of Primary Gastric CD30-Positive Anaplastic Large-Cell Lymphoma 
Journal of Korean Medical Science  2005;20(6):1062-1065.
Gastric CD30-positive anaplastic large-cell lymphoma is a very rare disease. It is sometimes difficult to distinguish it from undifferentiated carcinoma, sarcoma and so on. We report here on a case of primary gastric anaplastic large-cell lymphoma. A 50-yr-old woman complained of epigastric pain and severe chest pain for 1 week. The gastroendoscopic examination revealed geographic mucosal irregularities with shallow ulceration at the antrum. She underwent a total gastrectomy. The gross finding of the resected stomach was an 8×4.5 cm sized ulceroinfiltrative lesion at the pyloric antrum along the lesser curvature. The microscopic examination revealed diffuse and solid proliferations of large atypical cells with pleomorphic nuclei. Immunohistochemically, the tumor cells were positive for CD30, vimentin and CD3, and this was a finding compatible with anaplastic large-cell lymphoma. To the best of our knowledge, this is the first such reported case in Korea.
doi:10.3346/jkms.2005.20.6.1062
PMCID: PMC2779310  PMID: 16361823
Antigens, CD30; Lymphoma Large-Cell, Ki-1; Stomach Neoplasms; Immunohistochemistry
2.  Primary gastric mantle cell lymphoma 
Hematology Reports  2012;4(1):e1.
Mantle cell lymphoma represents 2.5–7% all of non Hodgkin's lymphomas. Stomach is the most common site of extranodal lymphoma. However, that is not the case with mantle cell lymphoma, which is extremely rare. We present a case of 71-year-old woman admitted to the Internal Clinic of the University Clinical Hospital Center Rijeka, because of stomach discomfort and melena. Endoscopy and computed tomography revealed a polyp in gastric antrum. Histopathologic, immunohistochemic and genetic methods were also performed and the results were consistent with primary gastric mantle cell lymphoma without periepigastric and/or local or distant abdominal lymph node involvement.
doi:10.4081/hr.2012.e1
PMCID: PMC3343450  PMID: 22567215
primary gastric mantle cell lymphoma; diagnosis; therapy.
3.  Primary Epithelial Ovarian Carcinoma with Gastric Metastasis Mimic Gastrointestinal Stromal Tumor 
Epithelial ovarian carcinoma rarely metastasizes to the parenchyma of the stomach. A 55-years-old woman presented with epigastric pain and a feeling of fullness for one month. A subsequent contrast-enhanced CT scan demonstrated a 4.5×4 cm submucosal mass with focal ulceration in the gastric antrum, and this finding was suggestive of GIST. After gastric antrectomy, the final pathology showed metastatic gastric tumor from a primary ovarian serous carcinoma. Because epithelial ovarian carcinoma is usually spread along the peritoneal surface, stomach involvement is rare. Furthermore, transmural gastric metastasis is very rare in a patient with primary ovarian carcinoma. Until now, there has been no reported case of stomach involvement at presentation in a patient with primary ovarian carcinoma. We present here a case of ovarian carcinoma with gastric metastasis that mimicked GIST.
doi:10.4143/crt.2008.40.2.93
PMCID: PMC2697489  PMID: 19688055
Gastric metastasis; Gastrointestinal stromal tumors; Ovarian carcinoma
4.  Totally Laparoscopic Resection for a Large Gastrointestinal Stromal Tumor of Stomach 
Journal of Gastric Cancer  2011;11(4):239-242.
A debate is currently ongoing about whether a large gastrointestinal stromal tumor (GIST) should be treated by the laparoscopic approach because of the increased risk of tumor rupture during manipulation of the tumor with laparoscopic instruments and the resultant peritoneal tumor dissemination. Herein, we report a case of a large GIST of the stomach which was successfully treated by the laparoscopic approach. A 57 year old female patient visited our institution complaining of postprandial epigastric discomfort. An esophagogastroduodenoscopy and an abdominal computed tomography scan revealed a 10×8 cm sized submucosal tumor at the greater curvature side of the gastric antrum. The patient underwent laparoscopic distal gastrectomy with intracorporeal Billroth-II reconstruction without any breakage of the tumor. Her postoperative course was uneventful and she was discharged on the 7th postoperative day. Even a large GIST of the stomach can safely be treated by the laparoscopic approach when it is performed with proper techniques by an experienced surgeon.
doi:10.5230/jgc.2011.11.4.239
PMCID: PMC3273696  PMID: 22324017
Gastrointestinal stromal tumor; Stomach; Laparoscopy
5.  Synchronous Double Malignant Tumors Consisting of Stomach and Hodgkin's Lymphoma with Collision between Gastric Adenocarcinoma and Hodgkin's Lymphoma in the Stomach 
Case Reports in Gastroenterology  2012;6(3):797-802.
We report the rare case of a 72-year-old man with double cancers (gastric adenocarcinoma and Hodgkin's lymphoma) with collision between gastric adenocarcinoma and Hodgkin's lymphoma. Abdominal computed tomography showed increased wall thickness in the fundus region of the stomach and multiple lymph node swellings in the lesser curvature, periceliac and left cardial regions. Upper gastrointestinal endoscopy showed an ulcer approximately 5 cm in diameter with a malignant appearance in the fundus region of the stomach. On histopathologic examination, two completely different tumors were recognized in the stomach. One tumor was a poorly differentiated adenocarcinoma characterized by poorly developed tubular structures associated with prominent lymphoid infiltration of the stroma. The other tumor was found to have proliferated in the wall of the stomach, with diffuse granulomatous lesions and bordering the adenocarcinoma. Large atypical lymphoid cells with prominent nucleoli and enlarged mononuclei or multinuclei were seen in the latter tumor. Hodgkin's lymphoma was also found in the swollen lesser curvature lymph nodes. As a result, gastric adenocarcinoma and metastasis of Hodgkin's lymphoma were collided in the stomach. In conclusion, this case might be helpful in exploring the occurrence mechanism of tumor collision between lymphoma and carcinoma.
doi:10.1159/000346465
PMCID: PMC3551438  PMID: 23341804
Synchronous; Gastric adenocarcinoma; Hodgkin's lymphoma; Collision
6.  Hepatic cyst misdiagnosed as a gastric submucosal tumor: A case report 
We describe here a case of 51-year-old woman with a symptomatic hepatic cyst that was misdiagnosed as a gastric submucosal tumor (SMT) with endoscopic ultrasound (EUS) and CT scan. The patient presented with an epigastric pain for two months. On endoscopy, a submucosal tumor was found on the cardia of the stomach. Based on EUS and abdominal CT scan, the lesion was diagnosed as a gastric duplication cyst or a gastrointestinal stromal tumor (GIST). The operative plan was laparoscopic wedge resection for the GIST of the gastric cardia. A cystic mass arising from the left lateral segment of the liver was found at the laparoscopic examination. There was no abnormal finding at the gastric cardia. She was treated by laparoscopic hepatic wedge resection including the hepatic cyst using an endoscopic linear stapler.
doi:10.3748/wjg.14.3092
PMCID: PMC2712182  PMID: 18494066
Hepatic cyst; Submucosal tumor; Stomach
7.  Rare Endoscopic Manifestation of Pancreatic Adenocarcinoma 
Case Reports in Gastroenterology  2012;6(2):496-501.
Gastric ulcer secondary to direct invasion from pancreatic adenocarcinoma is rare. Metastases to the stomach have been commonly reported with melanoma and with primary tumors of the breast, lung, ovary, liver, colon and testis. We report a patient who presented with epigastric pain and in whom subsequently upper endoscopy showed a malignant gastric ulcer secondary to direct invasion from pancreatic adenocarcinoma of the body. An 81-year-old female presented to our hospital with epigastric pain and subsequently underwent endoscopy with endoscopic ultrasound for evaluation of a pancreatic body mass. She had a large gastric ulcer in the fundus which was in direct continuity with the pancreatic mass. Pathology from biopsy of the ulcer revealed invasive well-to-moderately-differentiated adenocarcinoma, and immunohistochemical stains were strongly positive for CA19-9, CK7, CK19 and carcinoembryonic antigen. These findings were consistent with a histopathological diagnosis of metastatic carcinoma of the pancreas. Patients with gastrointestinal metastases usually have advanced malignancy with poor prognosis. Endoscopic evaluation with adequate biopsies should be performed for symptomatic patients.
doi:10.1159/000341524
PMCID: PMC3409509  PMID: 22855667
Pancreatic adenocarcinoma; Gastric ulcer; Gastrointestinal metastasis; Endoscopic evaluation
8.  PAX5-positive T-cell Anaplastic Large Cell Lymphomas Associated with Extra Copies of the PAX5 Gene Locus 
Cell lineage is the major criterion by which lymphomas are classified. Immunohistochemistry has greatly facilitated lymphoma diagnosis by detecting expression of lineage-associated antigens. However, loss or aberrant expression of these antigens may present diagnostic challenges. Anaplastic large cell lymphoma is a T-cell lymphoma that shows morphologic and phenotypic overlap with classical Hodgkin lymphoma, a tumor of B-cell derivation. Staining for the B-cell transcription factor, PAX5, has been suggested to be helpful in this differential, as it is positive in most classical Hodgkin lymphomas, but absent in anaplastic large cell lymphomas. Herein, we report four systemic T-cell anaplastic large cell lymphomas positive for PAX5 by immunohistochemistry, with weak staining intensity similar to that seen in classical Hodgkin lymphoma. All diagnoses were confirmed by a combination of morphologic, phenotypic, and molecular criteria. Three cases were ALK-negative and one was ALK-positive. PAX5 immunohistochemistry was negative in 198 additional peripheral T-cell lymphomas, including 66 anaplastic large cell lymphomas. Unexpectedly, though PAX5 translocations were absent, all evaluable PAX5-positive anaplastic large cell lymphomas showed extra copies of the PAX5 gene locus by fluorescence in situ hybridization. In contrast, only 4% of PAX5-negative peripheral T-cell lymphomas had extra copies of PAX5. We conclude that aberrant expression of PAX5 occurs rarely in T-cell anaplastic large cell lymphomas, and may be associated with extra copies of the PAX5 gene. PAX5-positive lymphomas with morphologic features overlapping different lymphoma types should be evaluated with an extensive immunohistochemical panel and/or molecular studies to avoid diagnostic errors that could lead to inappropriate treatment. Since PAX5 overexpression causes T-cell neoplasms in experimental models, PAX5 may have contributed to lymphomagenesis in our cases.
doi:10.1038/modpathol.2010.4
PMCID: PMC2848697  PMID: 20118907
Anaplastic large cell lymphoma; Hodgkin lymphoma; PAX5; CD30; T-cell receptor gene rearrangement; Immunohistochemistry; FISH
9.  Anorectal and gastric peripheral T-cell lymphoma, unspecified in a non-AIDS patient 
Anorectum is a rare location for malignant lymphoma. Involvement of is rare even for the lymphoma associated with acquired immune deficiency syndrome (AIDS), and AIDS has a relatively increased frequency of anorectal lymphoma. Most lymphomas in AIDS patients are of a B-cell origin, and T-cell lymphoma of the gastrointestinal tract is extremely rare. We report here on a case of anorectal and gastric peripheral T-cell lymphoma, unspecified (PTCLu) in a non-AIDS patient. A previously healthy 29-year-old man presented with hematochezia and tenesmus that he had suffered with for the previous 2 months. Sigmoidoscopy showed anal and rectal submucosal tumor. Multiple round-shaped, flat and elevated lesions were noted on the gastric antrum and body as well. He underwent excisional biopsy for the anal mass and the diagnosis was PTCLu. Biopsies of the gastric lesions gave the same diagnosis. There was no lymphoma involved in the bone marrow. At admission, no antibodies against human immunodeficiency virus were detected. He underwent systemic chemotherapy and upfront autologous stem cell transplantation.
doi:10.3904/kjim.2006.21.4.262
PMCID: PMC3891034  PMID: 17249511
Rectum; Peripheral T-cell lymphoma unspecified; Non-AIDS
10.  Torus Hyperplasia of the Pyloric Antrum 
Journal of Korean Medical Science  2009;25(1):152-154.
Primary or idiopathic hypertrophy of the pyloric muscle in adult, so called torus hyperplasia, is an infrequent but an established entity. It is caused by a circular muscle hypertrophy affecting the lesser curvature near the pylorus. Since most of the lesions are difficult to differentiate from tumor, distal gastrectomy is usually preformed to rule out most causes of pyloric lesions including neoplastic ones through a pathological study. A 56-yr-old man with a family history of gastric cancer presented with abdominal discomfort of 1 month duration. Upper gastrointestinal endoscopy showed a 1.0 cm sized irregular submucosal lesion proximal to the pylorus to the distal antrum on the lesser curvature. On colonoscopy examination, a 1.5 cm sized protruding mass was noticed on the appendiceal orifice. Gastrectomy and cecectomy were done, and histological section revealed marked hypertrophy of the distal circular pyloric musculature and an appendiceal mucocele. To the best of our knowledge, this is the first case of torus hyperplasia with appendiceal mucocele which is found incidentally.
doi:10.3346/jkms.2010.25.1.152
PMCID: PMC2800006  PMID: 20054408
Hyperplasia; Antrum, Pyloric; Appendix; Mucocele
11.  A Gastric Composite Tumor with an Adenocarcinoma and a Neuroendocrine Carcinoma: A Case Report 
Clinical Endoscopy  2013;46(3):280-283.
A 70-year-old woman was admitted to our department with epigastric discomfort and nausea over the duration of 1 month. An esophagogastroduodenoscopy showed the presence of a 1.0×1.0 cm-sized flat lesion with central ulceration at the greater curvature side of the antrum. A biopsy demonstrated the presence of an adenocarcinoma of well differentiated, intestinal type in the stomach. Endoscopic submucosal dissection was done and the diagnosis of a composite neuroendocrine carcinoma with an adenocarcinoma of the stomach was confirmed. We report a case of a gastric composite tumor with an adenocarcinoma and neuroendocrine carcinoma confirmed by endoscopic submucosal dissection with a review of the literature.
doi:10.5946/ce.2013.46.3.280
PMCID: PMC3678067  PMID: 23767040
Composite tumor; Adenocarcinoma; Carcinoma, neuroendocrine
12.  Synchronous indolent primary gastrointestinal lymphomas managed successfully with conservative measures 
American journal of therapeutics  2011;10.1097/MJT.0b013e3182246a6a.
We report the case of a 65 year-old man who presented with epigastric pain and guaic-positive stool. Upper and lower endoscopy revealed abnormalities in the gastric antrum and terminal ileum. Biopsy of these sites revealed histologically and immunophenotypically distinct lymphomas: gastric extranodal marginal zone lymphoma in the background of Helicobacter pylori infection and follicular lymphoma of the terminal ileum. After treatment with an H. pylori eradication regimen, repeat endoscopy showed resolution of the gastric extranodal marginal zone lymphoma and persistence of the ileal follicular lymphoma. Interestingly, molecular studies performed on the biopsy specimens revealed a common IgH rearrangement, suggesting a common precursor cell responsible for these two malignant processes. We present this unique case with a review of the literature, highlighting treatment principles for these two subtypes of indolent gastrointestinal non-Hodgkin lymphoma.
doi:10.1097/MJT.0b013e3182246a6a
PMCID: PMC3266981  PMID: 22020085
follicular lymphoma; extranodal marginal zone lymphoma; MALT; Helicobacter pylori
13.  Gastric T-cell lymphoma associated with hemophagocytic syndrome 
Background
Lymphoma-associated hemophagocytic syndrome (LAHS) occurs in mostly extra nodal non-Hodgkin's lymphoma. LAHS arising from gastrointestinal lymphoma has never been reported. Here we report a case of gastric T-cell lymphoma-associated hemophagocytic syndrome.
Case presentation
A 51-year-old woman presented with pain, redness of breasts, fever and hematemesis. Hematological examination revealed anemia. Gastroscopy revealed small bleeding ulcers in the stomach and the computed tomography scan showed liver tumor. She underwent total gastrectomy for gastrointestinal bleeding and the histopathology revealed gastric T-cell lymphoma. She continued to bleed from the anastomosis and died on the 8th postoperative day. Autopsy revealed it to be a LAHS.
Conclusions
If Hemophagocytic syndrome (HPS) occurs in lymphoma of the gastrointestinal tract, bleeding from the primary lesion might be uncontrollable. Early diagnosis and appropriate treatment are needed for long-term survival.
doi:10.1186/1477-7819-2-34
PMCID: PMC527873  PMID: 15491503
14.  Ewing's Sarcoma of the Stomach; Rare Case of Ewing's Sarcoma and Suggestion of New Treatment Strategy 
Journal of Gastric Cancer  2012;12(4):258-261.
Ewing's sarcoma is a neoplasm of the undifferenciated small round cells, which generally affects the bone and deep soft tissues of children and adolescents. We present a case of gastric Ewing's sarcoma; a 35-year-old female who had no symptoms. While she was at a routine medical checkup, a protruding mass in her gastric antrum was incidentally found on esophagogastroduodenoscopy. Endoscopic ultrasonogram showed a submucosal mass on the same lesion and a laparosopic wedge resection was done. Pathologic gross findings showed a granular grape appearance tissue and histoloigc examination revealed a small round cell tumor with CD 99 immunoexpression positive. In general, a combined modality therapy for Ewing's sarcoma such as surgical resection with chemotherapy, is accepted as an effective method. However, this patient had no adjuvant chemotherapy after surgery and she has no recurrence for eleven months.
doi:10.5230/jgc.2012.12.4.258
PMCID: PMC3543978  PMID: 23346500
Ewing's sarcoma; Combined modality therapy; Chemotherapy
15.  An atypical presentation of sporadic ovarian Burkitt’s lymphoma: case report and review of the literature 
Primary non-Hodgkin’s lymphoma of the ovary is a rare occurrence. An ovarian involvement by non-Hodgkin lymphoma (NHL) may include one of the four subtypes of lymphoma: diffuse large B-cell lymphoma, Burkitt’s lymphoma (BL), lymphoblastic lymphoma or anaplastic large cell lymphoma. Burkitt’s lymphoma is a rare entity with a specific poorly differentiated pattern.
Most women experience an ovarian BL with abdominal pelvic pain, abnormal vaginal bleeding, bowel obstruction, urinary frequency, incontinence and abdominal mass. Sometimes these warning signs may be absent, causing a late and more difficult diagnosis.
Here we report a case of a primary ovarian Burkitt’s lymphoma with bilateral involvement in a 57 year old patient. She firstly presented neurological symptoms in the upper limbs and she was treated with surgery and combined chemotherapy. The diagnosis of malignant lymphoma was established after bilateral adnexectomy and histological study of the excised tissue.
doi:10.1186/1757-2215-6-46
PMCID: PMC3710258  PMID: 23826666
Burkitt; Ovarian lymphoma; Hypoaesthesia; Oophorectomy; Chemotherapy
16.  Adenocarcinoma Arising in Gastric Heterotopic Pancreas: A Case Report 
Journal of Korean Medical Science  2004;19(1):145-148.
A heterotopic pancreas in the gastrointestinal tract is mostly found incidentally and its malignant transformation is extremely rare. We describe the second case of adenocarcinoma arising in a gastric heterotopic pancreas of an asymptomatic 35-yr-old man in Korea. Esophagogastroduodenoscopy revealed a submucosal tumor with an irregular central umbilication in the gastric antrum. A wedge resection specimen demonstrated a submucosal oligolocular cystic mass (1.7×1.4×1.2 cm) with a solid portion. Microscopically, the cystic portion was composed of dilated pancreaticobiliary type ducts with adjacent small foci of periductal glandular structures. The adenocarcinoma components in the solid area infiltrated the proper muscle and the overlying mucosa of the stomach. The transitional area between the benign ductal structures and the adenocarcinoma component was found. The follow-up course was uneventful 5 months postoperatively.
doi:10.3346/jkms.2004.19.1.145
PMCID: PMC2822253  PMID: 14966359
Adenomyoma; Stomach Neoplasms; Adenocarcinoma
17.  Gastric Lipoma Presenting with Massive Upper Gastrointestinal Bleeding 
A case of massive upper gastrointestinal bleeding in a 37-year-old female is presented showing a submucosal mass in the gastric body. At laparotomy a pedunculated submucosal mass was found located on the posterior wall at the junction of the body and antrum of the stomach, 8 cm from the pylorus. Pathology confirmed that it was a 4 cm benign gastric lipoma with a bleeding central ulcer. Gastric lipomas are rare, benign, typically submucosal tumors occurring in the gastric antrum. They are usually asymptomatic but can become symptomatic depending on size, location, and if there is ulceration of the lesion. These lesions may be mistaken as malignant tumors or present with upper GI bleeding or intussusception. The diagnosis can be made using a combination of upper endoscopy, endoscopic ultrasound, CT, and MRI with surgical excision being the definitive treatment of choice. We hope that this case highlights the fact that these lesions can present with massive upper GI haemorrhage and should be included in the diagnosis when appropriate.
doi:10.1155/2013/506101
PMCID: PMC3864169  PMID: 24363942
18.  A case of pedunculated hepatic hemangioma mimicking submucosal tumor of the stomach 
Hepatic hemangioma is the most common benign tumor of the liver. Most such hemangiomas are small, asymptomatic, and have an excellent prognosis. Giant hepatic hemangioma has been reported in the literature, but the exophytic and pedunculated forms of hepatic hemangioma are rare. A 56-year-old woman was referred to our hospital under the suspicion of having a gastric submucosal tumor. Abdominal computer tomography (CT) scans showed a pedunculated mass from the left lateral segment of the liver into the gastric fundus, exhibiting the atypical CT findings of hepatic hemangioma. We therefore decided to perform laparoscopic resection based on the symptoms, relatively large diameter, inability to exclude malignancy, and risk of rupture of the exophytic lesion. The pathology indicated it to be a cavernous hemangioma of the liver. Herein we report a case of pedunculated hepatic hemangioma mimicking a submucosal tumor of the stomach due to extrinsic compression of the gastric fundus.
doi:10.3350/kjhep.2011.17.1.66
PMCID: PMC3304623  PMID: 21494080
Hemangioma; Liver; Laparoscopy; Stomach neoplasm
19.  Gastric infiltration of diffuse large B-cell lymphoma: Endoscopic diagnosis and improvement of lesions after chemotherapy 
Diffuse large B-cell lymphoma (DLBCL) is the most common histologic subtype of the non-Hodgkin’s lymphoma (NHL) accounting for about 40% of all NHLs. This is a case report about the endoscopic appearance of a DLBCL with infiltration to the stomach in a 39-year-old female. She had a 6-mo history of lumbar and left upper quadrant pain with intermittent episodes of melena. A computer tomography (CT) scan showed mural thickening of the gastric antrum. Endoscopic examination revealed multiple gastric ulcers. Definite diagnosis could be made by endoscopic biopsies and the patient had a good response to chemotherapy. This response correlated well with a further endoscopic follow-up. A follow-up endoscopic examination could be considered to evaluate a good response to chemotherapy in DLBCL patients with secondary gastric dissemination.
doi:10.3748/wjg.14.4407
PMCID: PMC2731198  PMID: 18666335
Diffuse large B-cell lymphoma; Non-Hodgkin’s lymphoma; Gastric infiltration
20.  Review of the molecular profile and modern prognostic markers for gastric lymphoma: How do they affect clinical practice? 
Canadian Journal of Surgery  2012;55(2):117-124.
Primary gastric lymphoma is a rare cancer of the stomach with an indeterminate prognosis. Recently, a series of molecular prognostic markers has been introduced to better describe this clinical entity. This review describes the clinical importance of several oncogenes, apoptotic genes and chromosomal mutations in the initiation and progress of primary non-Hodgkin gastric lymphoma and their effect on patient survival. We also outline the prognostic clinical importance of certain cellular adhesion molecules, such as ICAM and PECAM-1, in patients with gastric lymphoma, and we analyze the correlation of these molecules with apoptosis, angiogenesis, tumour growth and metastatic potential. We also focus on the host–immune response and the impact of Helicobacter pylori infection on gastric lymphoma development and progression. Finally, we explore the therapeutic methods currently available for gastric lymphoma, comparing the traditional invasive approach with more recent conservative options, and we stress the importance of the application of novel molecular markers in clinical practice.
doi:10.1503/cjs.002310
PMCID: PMC3310767  PMID: 22564515
21.  Gastric Mucosa-Associated Lymphoid Tissue Lymphoma Followed by Primary Central Nervous System Lymphoma 
Mucosa-associated lymphoid tissue (MALT) lymphoma is one of the most common lymphomas and accounts for about 7% of all newly diagnosed non-Hodgkin's lymphoma (NHL). The clinical course of MALT lymphoma is relatively indolent and, in the majority of cases (50%), the lymphoma arises within the stomach. Primary central nervous system lymphoma (PCNSL), an uncommon variant of extranodal NHL, can affect any part of the neuraxis, including the eyes, brain, leptomeninges, or spinal cord. Herein, we present a rare case of PCNSL, which occurred one year after radiochemotherapy of gastric MALT lymphoma. A 62-year-old man presented with a 3-day history of left facial palsy. One year ago, he underwent antibiotic eradication therapy of Helicobacter pylori, local stomach fractional radiotherapy, and chemotherapy for gastric MALT lymphoma. Magnetic resonance imaging revealed a strong enhancing solid mass in the right frontal lobe. The tumor was completely removed, and the histological diagnosis of PCNSL developing from diffuse large B-cell lymphoma was made. Although elucidating the correlation between the first gastric MALT lymphoma and the second PCNSL seemed difficult, we have postulated and discussed some possible pathogeneses, together with a review of literature.
doi:10.3340/jkns.2012.51.6.377
PMCID: PMC3424181  PMID: 22949970
MALT Lymphoma; Diffuse large B-Cell lymphoma
22.  Gastric metastasis from ovarian carcinoma: A case report and literature review 
An isolated parenchymal gastric metastasis from ovarian carcinoma without any other sites of recurrence is extremely rare. Only two cases have been reported, both of which were symptomatic. We herein report such a case without any symptoms. A 61-year-old woman presented with a high cancer antigen-125 level without any other clinical manifestation. A subsequent 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography scan revealed a submucosal mass with hypermetabolism of 18F-FDG (standardized uptake value: 5.36) in the gastric antrum. The final pathology after gastric antrectomy showed a metastatic gastric tumor from a primary ovarian carcinoma. We also performed an extensive literature review about gastric metastasis from ovarian carcinoma published until recently, and this is the first case of an isolated parenchymal gastric metastasis from ovarian carcinoma without any symptoms.
doi:10.3748/wjg.v18.i43.6341
PMCID: PMC3501787  PMID: 23180959
Ovarian carcinoma; Gastric antrum; Metastasis; Submucosal tumor; Parenchymal tumor
23.  Primary gastric Hodgkin's lymphoma 
Background
Primary Hodgkin's disease of the stomach is an extremely rare entity. Nearly all cases of primary gastric lymphoma are of the non-Hodgkin's variety. Diagnoses in such cases are difficult due to considerable histological similarities between the 2 disease entities.
Case presentation
We report the case of a 77 year old lady with a 1 year history of weight loss and poor appetite. Physical examination was unremarkable. Subsequent multiple upper GI endoscopies revealed a large malignant looking ulcer which was deemed to be histologically benign. Following CT imaging the patient underwent a radical gastrectomy. Postoperatively histology and immunohistochemistry failed to confirm a diagnosis. As such a second opinion was sought. Employing an extended array of immunohistological staining a diagnosis of 'Classical Hodgkin's' disease of the stomach was achieved.
Conclusion
Our case illustrates the significant difficulties in achieving a rare diagnosis of primary Hodgkin's lymphoma of the stomach. The non-specific nature of symptoms and a lack of histological features make a preoperative diagnosis extremely difficult. While immunohistochemistry is widely employed in aiding the evaluation of such cases, one should be wary of the considerable overlap in differentiating between Hodgkin's and non-Hodgkin's disease entities using this technique.
doi:10.1186/1477-7819-5-119
PMCID: PMC2117016  PMID: 17949508
24.  Exophytic inflammatory myofibroblastic tumor of the stomach in an adult woman: A rare cause of hemoperitoneum 
Inflammatory myofibroblastic tumor (IMT) of the stomach in adults is extremely rare, with unpredictable prognosis. We present a 55-year-old woman with a gastric IMT. She experienced sudden abdominal pain 4 d previously. Physical examination showed mild abdominal tenderness in the hypogastrium, but no palpable abnormal abdominal mass. Abdominal CT showed a mass of approximately 8 cm in the gastrocolic ligament. On laparoscopic exploration, unexpected hemoperitoneum of approximately 1.5 L of blood was found, and an exophytic gastric mass of approximately 10 cm, appeared from the anterior wall of the gastric body along the greater curvature. Laparoscopy further showed that non-clotting blood in the abdominal cavity seemed to be from the gastric tumor. After conversion to open surgery for more precise evaluation of the cause of hemoperitoneum and the large friable tumor, gastric wedge resection, including the tumor, was conducted. The final diagnosis was consistent with IMT that originated from the gastric wall.
doi:10.3748/wjg.14.136
PMCID: PMC2673379  PMID: 18176977
Stomach disease; Stomach neoplasms; Hemoperitoneum; Myofibroma; Granuloma; Plasma cell; Stomach surgery
25.  Malignant lymphomas in Korea. 
A retrospective histological study of 540 malignant lymphomas diagnosed at the Department of Pathology of the Seoul National University from 1976 through 1986 is presented. Malignant lymphoma is the 10th most common malignant tumor in Korea, comprising 3.07% of all malignancy during period of study. Among malignant lymphomas non-Hodgkin's lymphoma accounted for 82% and accordingly the Hodgkin's disease was for 18%. The most common type of non-Hodgkin's lymphoma was diffuse histiocytic lymphoma of Rappaport. Follicular lymphoma was very rare, comprising only 2.3%. T-cell lymphoma accounted for 9.6% of non-Hodgkin's lymphomas, the most frequent type being lymphoblastic lymphoma. Immunoblastic sarcoma and mycosis fungoides were occasionally seen but there was no case of pleomorphic adult T-cell lymphoma. Among Hodgkin's diseases, mixed cellularity type was the most common type, and nodular sclerosis type was relatively rare.
PMCID: PMC3053643  PMID: 3268180

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