Date of Presentation:11/18/2016

Attending pathologist: Wei Chen, MD, PhD

Presented by: Mohammed Alsomali, MD; Andrew Martowski, MD

Prepared by: Youssef Youssef, MD; Rulong Shen, MD



74 years old female with a liver mass.

Her past medical history is significant for transitional cell carcinoma of the ureter and a small 1-2 cm mass of her right upper arm.

What is the most likely diagnosis?

  1. GIST
  2. Malignant PEComa
  3. Melanoma
  4. Angiomyolipoma
Malignant PEComa (perivascular epithelioid cell tumor)