Prostatic Adenocarcinoma Metastatic to Pleomorphic Liposarcoma, a “Collision Phenomenon”: Report of a Case with Review of Pelvic Collision Tumors

Table 1

List of collision tumors in the pelvis.

Case no.	Source	Tumor 1	Tumor 2	Site
(1)	Juhasz and Kiss/1978 [7]	Liposarcoma	Pr ACa	Right seminal vesicle
(2)	Erler/1978 [22]	Pleomorphic carcinoma	Leiomyoma	True pelvis
(3)	Palma et al./1983 [9]	Leiomyosarcoma	Pr ACa	Prostate
(4)	Oda et al./1984 [23]	TCC bladder	Colon ACa	Vesicocolic fistula
(5)	Paveli et al./2000 [3]	Rectal leiomyosarcoma	Pr ACa	Prostate & rectum
(6)	Roh et al./2006 [2]	Rectal ACa	Gastric ACa	Rectum
(7)	Brahmania et al./2007 [4]	Colon ACa	Granulosa cell tumor, ovary	Pelvic mass
(8)	Gheith et al./2009 [5]	Myelolipoma	CLL/SLL	Pelvic mass

PrACa: prostatic adenocarcinoma, ACa: adenocarcinoma, TCC: transitional cell carcinoma, CLL/SLL: chronic lymphocytic leukemia/small lymphocytic lymphoma.