Cases
50-year-old man with painful solitary nodule   

History and images

Our appreciation is extended to Dr. Natalia Velez-Lopez and Dr. Zully Gonzalez-Lopez, University of Antioquia in Medellin, Colombia, for contributing this case.

History: A 50-year-old man presented a painful, growing lesion on the left hypochondrium. He said it was the only lesion, and it had been there for one year. He hasn’t received treatments in the past. Clinical and microscopic images are presented.

Click images to enlarge.

What is the most likely diagnosis based on morphology and histology?
Pigmented basal cell carcinoma
Cylindroma
Spiradenoma
Spiradenocarcinoma

This lesion could be the marker of a genodermatosis.
True
False

This lesion is rarely painful.
True
False

Extra facial location is the most common.
True
False