title: Spontaneous regression of colorectal cancer metastatic to retroperitoneal lymph nodes.
abstract: Spontaneous remissions have been reported in solid tumors such as melanoma and renal cell cancer. However, spontaneous remissions in colon cancer have not been previously radiographically confirmed. A case of colon cancer metastatic to the retroperitoneal lymph nodes that exhibited a durable spontaneous regression is reported. The exact trigger of this phenomenon has not been elucidated; however, an antitumor immune response is the most likely explanation. The identification and characterization of similar cases would probably result in defining a patient population that can be followed by observation and may result in the development of novel therapeutic strategies.
authors.affiliation: Departments of Medicine, Roswell Park Cancer Institute, Buffalo, NY 14263, USA.
authors.forename: Arvinder S
authors.initials: AS
authors.lastname: Bir
authors.forename: Ahmad A
authors.initials: AA
authors.lastname: Fora
authors.forename: Charles
authors.initials: C
authors.lastname: Levea
authors.forename: Marwan G
authors.initials: MG
authors.lastname: Fakih