title: A unique case of inflammatory fibroid polyp in the duodenum of a female adolescent: Case report and literature review.
abstract: BACKGROUND
  Inflammatory fibroid polyp (IFP) is a very rare benign condition in children that can occur throughout the gastrointestinal tract. It is characterized as a polypoid lesion originating in the submucosa, composed of connective tissue and eosinophilic infiltrate. It is most common in the stomach and in adults between the fifth and seventh decades of life. Its occurrence is unusual in the duodenum.
  
  
  METHODS
  One case of duodenal IFP was described and the literature is reviewed with emphasis on the clinical and pathological features of IFP in children. A case of an IFP in the duodenum of a 13-year-old girl, who presented with abdominal pain, weight loss, vomiting, and constipation. The patient underwent exploratory laparotomy; a stenosing tumor of the third duodenal portion was found. The affected segment was resected and an end-to-end anastomosis between the duodenum and jejunum segment was performed. Immunohistochemically, actin and CD34 were positive, Ki67 was positive in <1% of cells, and the proteins CD117 and S100 were negative.
  
  
  CONCLUSIONS
  To our best of our knowledge, this is the fourth report of IFP in adolescents, the first in a female's duodenum.
authors.affiliation: Medical Assistant, Pediatric Surgery Department Medical Chief of Pediatric Surgery, Hospital do Servidor Público Municipal de São Paulo (HSPM), São Paulo Laboratório de Delineamento de Estudos e Escrita Científica, Faculdade de Medicina do ABC (FMABC), Santo André, Brazil Full professor, Angiology and Vascular Surgery, Faculdade de Medicina do ABC (FMABC), Santo André, Brazil.
authors.forename: Mauricio Giusti
authors.initials: MG
authors.lastname: Calderon
authors.forename: Valéria Campos
authors.initials: VC
authors.lastname: Caivano
authors.forename: Sauro
authors.initials: S
authors.lastname: Bagnaresi
authors.forename: José Ozório
authors.initials: JO
authors.lastname: de Oliveira Lira
authors.forename: Rodrigo Daminello
authors.initials: RD
authors.lastname: Raimundo
authors.forename: Luiz Carlos
authors.initials: LC
authors.lastname: de Abreu
authors.forename: João Antonio
authors.initials: JA
authors.lastname: Correa
mesh_terms: D000293:Adolescent; D003937:Diagnosis, Differential; D004378:Duodenal Diseases / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery*; D004386:Duodenum / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery*