Soft tissue mass at the infrascapular fossa

doi:10.1007/s00256-010-0915-3

Skeletal Radiol. 2011 January; 40(1): 105–106.

Published online 2010 April 15. doi: 10.1007/s00256-010-0915-3

PMCID: PMC2989001

Soft tissue mass at the infrascapular fossa

Seng-Choe Tham,^1,³ Andrew E. Horvai,² Thomas Link,¹ and Lynne Steinbach¹

¹Department of Radiology, University of California, San Francisco, USA

²Department of Pathology, University of California, San Francisco, USA

³Department of Radiology, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433 Singapore

Seng-Choe Tham, Phone: +65-93898980, Email: Seng_Choe_Tham/at/ttsh.com.sg.

Corresponding author.

Question

A 23-year-old man with a 5-year history of acute lymphoblastic leukemia (ALL) and who was in remission after chemotherapy treatment presenting with a shoulder mass (Figs. 1–4).

Fig. 2

The tumor was composed of short, intersecting fascicles of spindle cells with scattered small lymphocytes (original magnification, ×400)

Fig. 3

At high power, the majority of tumor cells demonstrated fusiform pale eosinophilic cytoplasm and elongated, blunt-ended nuclei (original magnification, ×400). These cells were strongly positive for the smooth muscle marker h-caldesmon by immunohistochemistry (more ...)

Fig. 1

Sagittal oblique T1-weighted fast spin echo image with chemical fat saturation and intravenous gadolinium reveals heterogeneous enhancement of a mass within the infrascapular region (arrow)

Fig. 4

In situ hybridization for the LANA gene showed expression in smooth muscle cells and lymphocytes (original magnification, ×200)

Acknowledgments

Open Access This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

Footnotes

The diagnosis can be found at doi:10.1007/s00256-010-0916-2.

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