This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oncology, Subject name: Medicine
True about PEComa (perivascular epithelioid cell tumour) - 
Select and explain. 
A. Melanin & HMB45 are markers, B. Malignant melanoma variant, C. Contain perivascular epithelioid cells, D. Angiomyolypoma (AML) is a subtype
A: Melanin & HMB45 are markers
Answer: A: Melanin & HMB45 are markers 
Explanation: Perivascular epithelioid cell tumour. Histopathologic image of renal angiomyolipoma. .Perivascular epithelioid cell tumour, also known as PEComa or PEC tumour, is a family of mesenchymal tumours consisting of perivascular epithelioid cells (PECs). These are rare tumours that can occur in any pa of the human body PECs typically stain for melanocytic markers (HMB-45, Melan A) Ref Harrison 20th edition pg 567