title: Collision Tumor With Renal Cell Carcinoma and Plasmacytoma: Further Evidence of a Renal Cell and Plasma Cell Neoplasm Relationship?
abstract: Renal solitary extramedullary plasmacytomas belong to a group of plasma cell neoplasms, which generally have been associated with renal cell carcinoma. We present a case report of a patient with collision tumor histology of extramedullary plasmacytoma and clear cell renal cell carcinoma, the first in the known literature. Standard work-up for a plasma cell neoplasm was conducted and the mass was resected. The patient remains disease-free at 28 months post-surgery. The report calls into question pre-surgical renal mass biopsy protocol and suggests a relationship between renal cell carcinoma and plasma cell neoplasms.
authors.affiliation: Department of Urology, UC San Diego Health System, La Jolla, CA, USA.
authors.forename: Sean W
authors.initials: SW
authors.lastname: Berquist
authors.affiliation: Department of Urology, UC San Diego Health System, La Jolla, CA, USA.
authors.forename: Abd-Elrahman Said
authors.initials: AE
authors.lastname: Hassan
authors.affiliation: Department of Urology, UC San Diego Health System, La Jolla, CA, USA.
authors.forename: Olga
authors.initials: O
authors.lastname: Miakicheva
authors.affiliation: Department of Urology, UC San Diego Health System, La Jolla, CA, USA.
authors.forename: Catherine
authors.initials: C
authors.lastname: Dufour
authors.affiliation: Department of Urology, UC San Diego Health System, La Jolla, CA, USA.
authors.forename: Zachary
authors.initials: Z
authors.lastname: Hamilton
authors.affiliation: Department of Pathology, UC San Diego Health System, La Jolla, CA, USA.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Shabaik
authors.affiliation: Department of Urology, UC San Diego Health System, La Jolla, CA, USA.
authors.forename: Ithaar H
authors.initials: IH
authors.lastname: Derweesh
keywords: Collision tumor; Plasmacytoma; Renal cell carcinoma