2021-23/ June 7
Contributors: Costantino Ricci and Michelangelo Fiorentino
A woman in her early 50s presented with a kidney mass, which had been incidentally identified during radiological exams performed for other clinical issues.
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1. What is the correct diagnosis?
a. Low-grade oncocytic tumor (LOT)
2. Which of the following immunohistochemical assays, when positive expression is present, supports the diagnosis?
a. CK20 and Cathepsin K
3. What histological feature supports the diagnosis?
a. “Raisinoid” nuclei