title: Tumor metastasis to an oncocytoma.
abstract: A case of squamous carcinoma of the lung metastatic to a renal oncocytoma is described. The terms "tumor-to-tumor metastasis" and "collision tumor" for describing the existence of two neoplasms in the same location are discussed.
authors.affiliation: Department of Pathology, Faculty of Medicine, Hacettepe University, Ankara, Turkey. altinok@superonline.com
authors.forename: G
authors.initials: G
authors.lastname: Altinok
authors.forename: G
authors.initials: G
authors.lastname: Güler
authors.forename: A
authors.initials: A
authors.lastname: Sahin
mesh_terms: D018249:Adenoma, Oxyphilic / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000473:pathology / Q000556:secondary*; D006801:Humans; D007668:Kidney / Q000473:pathology; D007680:Kidney Neoplasms / Q000473:pathology*; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*