HISTORY:
A male patient in his 70s presented with right flank pain. Subsequent abdominal and pelvic MRI demonstrated a 1.6 cm mass in the upper pole of his right kidney. Right partial nephrectomy was conducted on follow up.
GROSS:
The specimen is designated “Right kidney tumor” and consists of a 3.5 cm x 3.0 cm x 2.3 cm partial nephrectomy. Sectioning of the specimen reveals a 1.6 cm x 1.5 cm x 1.3 cm yellow red-brown mass that is entirely submitted.
Molecular testing for Trisomy 7/17 is negative.
What is the most likely diagnosis?
- Papillary renal cell carcinoma
- Sarcomatoid renal cell carcinoma
- Collecting duct carcinoma
- Mucinous tubular and spindle cell carcinoma
- Renal carcinoid
Mucinous tubular and spindle cell carcinoma