July 2010

Katherine Kasper, MD, Fellow, Department of Cytopathology
Northwestern University, Feinberg School of Medicine, Chicago, IL, USA

CASE HISTORY: 
The patient is a 59 year-old male with a history of diabetes and hyperlipidemia who presented with one year of abdominal discomfort, chronic constipation, and increasing abdominal distention. CT scan revealed a large, approximately 25 cm mesenteric mass extending from the upper abdomen to the pelvis. Ultrasound-guided core biopsy was performed. Touch preparations were made during on site adequacy evaluation/triage by Cytopathology.

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Fig. 1 DQ-stained touch preparations
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Fig. 2 H&E-stained core biopsy

 

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Fig. 3 Immunohistochemical stains, CD117/c-kit, CD34, smooth muscle actin (SMA), and Ki-67

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