This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neoplasia, Subject name: Pathology
Which condition is associated with S-100 marker? 
Select and explain. 
A. Multiple myeloma, B. Malignant melanoma, C. Prostate carcinoma, D. Medullary carcinoma thyroid
B: Malignant melanoma
Answer: B: Malignant melanoma 
Explanation: Ans is 'b' i.e. Malignant melanoma Markers for melanocytes1) S-100 - 90% of tumors are positive2) HMB-45 - More specific but less sensitive than S-1003) TA-904) Tyrosinase5) Microphthalmia transcription factor 6) Melan-A