Author: Richard Cantley, MD. Cytopathology Fellow, McGaw Medical Center, Northwestern University, Chicago, USA
Reviewer: Ajit Singh Paintal, MD. Assistant Professor of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, USA.
68 year old man with a history of colonic adenocarcinoma metastatic to the liver presents with a 3.4 cm exophytic, cystic lesion of the left kidney. CT-guided biopsy of the lesion was performed, and images from Diff-Quik stained touch prep slides are provided.