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Fournier's gangrene is a life-threatening disorder caused by aerobic and anaerobic bacterial infection. We report a case of genital infection as the initial warning sign of acute myeloid leukemia. We were able to prevent progression to Fournier's gangrene in our patient by immediate intensive therapy with incision, blood transfusions and intravenous administration of antibiotics. This case suggests that hematologists and dermatologists should keep in mind that genital infection can be a first sign of hematologic malignancy.
Fournier's gangrene (FG) is a life-threatening disorder caused by synergistic aerobic and anaerobic organisms . The infection of the perineum, scrotum, and/or penis spreads along fascial planes, leading to soft-tissue necrosis . The mortality rate for FG remains high despite antibiotics and aggressive debridement . The initial signs of FG are fever, pain, swelling, and blistering in the genital area . Here, we describe a case of genital infection as the first sign of acute myeloid leukemia (AML).
A 51-year-old male presented with fever and a painful, edematous erythema on the scrotum and penis (fig. 1a, b). The eruption had developed after the patient had ridden a bicycle 7 days earlier. Laboratory blood examination results were as follows: white blood cells 7,800/μl with neutrophil 12.0%; lymphocytes 4.7%; monocytes 0.3%; myeloblasts 83.0%; red blood cells 1.97 × 106/μl; platelets 26.4 × 104/μl, and C-reactive protein 4.621 mg/dl. The smear from the bone marrow indicated the presence of a massive myeloblast. The cells expressed CD7, CD11, CD13, CD14, and CD34. An incision was made in the scrotum. Corynebacterium spp. was isolated from the genital region. The patient was immediately hospitalized and intensively treated with blood transfusions and the antibiotics cefpirome sulfate 4 g and clindamycin 2,400 mg per day for 5 days and cilastatin sodium 2 g and clindamycin 2,400 mg per day for 9 days. The sign of infection diminished two weeks later. Treatment for AML was then initiated using cytarabine, aclarubicin, and granulocyte-colony stimulating factor.
FG was mainly caused by trauma and urinary tract infection . In our case, we suspect that the trauma was due to the cycling activity and that the infection was worsened by leukocytopenia due to AML. Corynebacterium spp. was cultured from the scrotum. We do not think that Corynebacterium spp. was the actual pathologic bacteria because Corynebacterium spp. is part of the normal cutaneous flora in the genital area. We believe that our patient showed scrotum infection by unidentified bacteria and that intensive medication prevented progression to ulceration and the more advanced stage of necrosis as a sign of FG.
Few cases of FG have been described as a first sign of hematologic malignancies [4, 5], although cases have been reported as a complication during treatment (table (table1)1) [2, 6,7,8,9,10,11]. Martinelli et al.  reported a fetal case having progressive involvement of the abdominal wall resulting in death from leukemia. They indicated that early diagnosis of the disorder and appropriate initiation of an accurate therapy can prevent progression of the acute necrotizing infection . In the reported cases of FG associated with a hematologic malignancy, the edema and swelling were the initial signs [2, 5, 7, 9, 10]. The immediate start of the treatment might have prevented the present patient from being affected by FG.
Hematologists and dermatologists should keep in mind that genital infection and its advanced stage of FG can be an initial sign of hematologic malignancy.