2019-24 / JULY 29 (CONTRIBUTOR: JOHN CHEVILLE)
26-year-old male presents with a “fibrous plaque” of the penis associated with curvature. The patient undergoes surgery for presumed Peyronie’s disease at which time the surgeon excises the plaque material. The tumor is Keratin-positive. The immunostain shown is INI-1.
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1. What is the most common site of involvement of penile sarcomas?
2. What sarcoma does not occur on the penis?
3. What is the most useful immunohistochemical panel in this setting?