title: [A case of primary micropapillary carcinoma of the jejunum].
abstract: Micropapillary carcinoma (MPC) has been recently reported as a variant of invasive breast carcinoma. MPC is also known to be an aggressive variant of adenocarcinoma, and it is associated with poor prognosis and a high propensity for lymphovascular invasion and lymph node metastases. MPC of the breast, urinary bladder, and lung has been reported relatively frequently; however, there have been few reports on gastrointestinal MPC. Furthermore, MPC of the small bowel has not been reported yet. Here we report a case of MPC of the jejunum. A female septuagenarian was admitted because of anorexia and weight loss. We established a diagnosis of primary jejunal cancer and resected the duodenum and a part of the jejunum. Histologically, the tumor consisted of adenocarcinoma with moderate to poor differentiation. Among the carcinoma cells, approximately 10% formed small papillary neoplastic cell clusters surrounded by clear spaces, suggesting a diagnosis of MPC. We present the details of the case along with a review of relevant literature.
authors.affiliation: Department of Medicine, Okayama Saiseikai General Hospital.
authors.forename: Anna
authors.initials: A
authors.lastname: Seki
authors.forename: Masao
authors.initials: M
authors.lastname: Yoshioka
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Saito
authors.forename: Masakuni
authors.initials: M
authors.lastname: Fujii
authors.forename: Mamoru
authors.initials: M
authors.lastname: Ito
authors.forename: Shuhei
authors.initials: S
authors.lastname: Ishiyama
authors.forename: Akiko
authors.initials: A
authors.lastname: Fujiwara
authors.forename: Junji
authors.initials: J
authors.lastname: Shiode
authors.forename: Soichiro
authors.initials: S
authors.lastname: Nose
mesh_terms: D000368:Aged; D002291:Carcinoma, Papillary / Q000175:diagnosis* / Q000601:surgery; D005260:Female; D006801:Humans; D007580:Jejunal Neoplasms / Q000473:pathology* / Q000601:surgery; D008207:Lymphatic Metastasis; D009367:Neoplasm Staging; D014057:Tomography, X-Ray Computed