title: Carcinoma multiplex.
abstract: Multiple primaries in a single patient are uncommon, though not very rare. The existence of such cancers in two un-related, non-paired organs is even more un-common. Here, we present a case of 55 years old male who presented to us with a mucoepidermoid carcinoma of the parotid gland and was operated. Later on, he presented with a large cystic swelling in the pelvis which turned out to be pseudomyxoma peritonei. A review of slides and immunohistochemistry indicated it to be adenocarcinoma colon. He presented again with recurrent mucoepidermoid carcinoma of the parotid which was operated successfully with the use of myocutaneous flap for wound closure. He is currently undergoing chemotherapy. In order to establish a separate mono-clonal etiology of both tumours, immunohistochemistry was performed. To the best of our knowledge, carcinoma multiplex in the colon and the parotid has never been reported before.
authors.affiliation: Department of General Surgery, Pakistan Institute of Medical Sciences, Islamabad. drsaslamshah@gmail.com
authors.forename: Syed Aslam
authors.initials: SA
authors.lastname: Shah
authors.forename: Umbreen
authors.initials: U
authors.lastname: Riaz
authors.forename: Imran
authors.initials: I
authors.lastname: Zahoor
authors.forename: Ana
authors.initials: A
authors.lastname: Jalil
authors.forename: Muhammad
authors.initials: M
authors.lastname: Zubair
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology* / Q000601:surgery; D018277:Carcinoma, Mucoepidermoid / Q000473:pathology* / Q000601:surgery; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D010307:Parotid Neoplasms / Q000473:pathology* / Q000601:surgery; D010386:Pelvic Neoplasms / Q000473:pathology / Q000601:surgery; D010534:Peritoneal Neoplasms / Q000473:pathology* / Q000601:surgery; D011553:Pseudomyxoma Peritonei / Q000473:pathology* / Q000601:surgery; D016896:Treatment Outcome; D014463:Ultrasonography