A patient has a tender, firm, nodular cystic lesion on his scalp that produces cheesy discharge with foul odor. This is most likely a:
A. Bacterial folliculitis
B. Basal cell carcinoma
C. Bullous impetigo
D. Epidermoid cyst
ANS: D
With an epidermoid cyst, the patient complains of a cystic lesion that produces cheesy discharge with foul odor. The lesion is sometimes tender or painful. The lesion is nodular, round and firm, and subcutaneous; thus, it is flesh colored. The most common sites include the face, scalp, neck, upper trunk, and extremities.
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