This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'All of the following statements about malignant melanoma are true except:a) prognosis is better in female than in male b) Acral lentiginous melanoma carries a good prognosisc) Stage II A shows satelite depositsd) Most common type is superficial spreading melanoma \nSelect and explain. \nA. a, B. c, C. ac, D. bc', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Acral lentignous melanoma has the worst prognosis\nSatellite deposits are foci of tumor adajent but separate from the primary melanoma also k/a in-transit metastasis. In the original staging system, satellite deposits or lesions were classified as stage II ds.\n\nConventional staging of melanoma\nStage I\xa0→ Primary tumor\nStage II\xa0→ Presence of satellites or regional lymph nodes\nStage III → Spread beyond regional lymph nodes\n\n\nBut according to latest AJCC classification (2002) presence of satellite lesions is classified as stage III.\n\nMore facts about melanoma \n\nMost of the melanomas develop in benign nevus.\nABCD of melanoma - Lesions that are suspicions of melanoma can be identified by their clinical characteristic often referred to as ABCD.\n\nABCD of melanoma\nAsymmetry : asymmetric shape or contour\nBorders : irregular or illdefinied borders\nColour : colour variegation\nDiameter : larger than 6 mm (some books say 5mm)', 'role': 'assistant'}]