title: Inflammatory myofibroblastic tumor of the rectum in a 13-month-old girl: a case report.
abstract: Inflammatory myofibroblastic tumor is a rare benign neoplasm. It is common in children and has been reported in various locations throughout the body but rarely in the rectum. A 13-month-old girl presented with a short history of a painless anal mass and no hematochezia. The mass was completely excised, and histologic examination of the initial biopsy showed fascicles of spindle cells in a mixed inflammatory background with predominance of plasma cells, typical of an inflammatory pseudotumor. The spindle cells were positive for smooth muscle actin and anaplastic lymphoma kinase staining. There is no evidence of recurrence or metastasis after a follow-up of 4.5 years.
authors.affiliation: Department of Pediatric Surgery, Taizhou Hospital, Zhejiang Province, China. wxz613@126.com
authors.forename: Xuewu
authors.initials: X
authors.lastname: Zhou
authors.forename: Chunfen
authors.initials: C
authors.lastname: Luo
authors.forename: Shuhui
authors.initials: S
authors.lastname: Lv
authors.forename: Meifu
authors.initials: M
authors.lastname: Gan
mesh_terms: D000199:Actins / Q000032:analysis; D000077548:Anaplastic Lymphoma Kinase; D003937:Diagnosis, Differential; D005260:Female; D005354:Fibrosarcoma / Q000175:diagnosis; D006104:Granuloma, Plasma Cell / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007223:Infant; D007417:Intestinal Polyps / Q000175:diagnosis; D058628:Myofibroblasts / Q000473:pathology; D009361:Neoplasm Invasiveness; D010950:Plasma Cells / Q000473:pathology; D020794:Receptor Protein-Tyrosine Kinases / Q000032:analysis; D012002:Rectal Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D012004:Rectal Neoplasms / Q000175:diagnosis
chemical_list: D000199:Actins; C000626173:ALK protein, human; D000077548:Anaplastic Lymphoma Kinase; D020794:Receptor Protein-Tyrosine Kinases