Date of Presentation:3/01/2022

Attending pathologist: Anil Parwani, MD, PhD, MBA

Presented by: Lokman Cevik, MD

Prepared by: Vidya Arole, MD

Organ:Kidney

HISTORY:

65-year-old female presented to her PCP for low back pain.

She underwent an MRI of lumbar spine that showed an 8 mm focus of mild increased T2 signal intensity involving the posterior cortex of the left mid kidney and CT renal mass recommended.

CT AP showed left midpole anterior cortex hyperdense renal lesion measuring 1.1 x 1.0 cm.

The mass was biopsied for diagnostic purposes and was sent for histopathological examination.

GROSS:

What is the most likely diagnosis?

  1. Papillary renal cell carcinoma, type 2
  2. Oncocytoma
  3. Chromophobe renal cell carcinoma
  4. Papillary renal neoplasm with reverse polarity
  5. Papillary renal cell carcinoma, oncocytic variant
Papillary renal neoplasm with reverse polarity