title: Renal collision tumor in association with xanthogranulomatous pyelonephritis.
abstract: Collision tumor is a rare condition in which two neoplasms (usually benign and malignant), both growing in the same general area, collide with each other and become intermingled. We present histopathology and imaging correlation of xanthogranulomatous pyelonephritis coexistent with squamous cell carcinoma and osteogenic sarcoma of the kidney.
authors.affiliation: Department of Urology, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Rothschild
authors.forename: Shweta
authors.initials: S
authors.lastname: Bhatt
authors.forename: Vikram S
authors.initials: VS
authors.lastname: Dogra