title: Solid-pseudopapillary tumor of the pancreas: MR imaging findings in 21 patients.
abstract: OBJECTIVE
  Solid-pseudopapillary tumor (SPT) of the pancreas is a rare, low-grade malignancy, which mostly occurs in adolescent and young adult females. The goal of this study was to retrospectively analyze the magnetic resonance (MR) imaging presentation of SPT of the pancreas.
  
  
  METHODS
  We retrospectively reviewed the preoperative MR imaging examinations and the medical, surgical and histopathological records of 21 patients who underwent surgery for SPT of the pancreas. MR imaging included T1-weighted, T2-weighted, and gadolinium chelate-enhanced MR imaging. In addition, 10 patients had diffusion-weighted (DW) MR imaging. MR examinations were retrospectively reviewed for location, size, morphological features and signal intensity of the tumors.
  
  
  RESULTS
  Nineteen women and 2 men (median age, 23 years; range, 14-59) were included. Seven patients (7/21; 33%) presented with abdominal symptoms. The median largest tumor diameter was 53mm (range, 32-141 mm). SPTs were located in the pancreatic head, body, and tail in 9 (9/21; 43%), 5 (5/21; 24%) and 7 (7/21, 33%) patients, respectively. All patients (21/21; 100%) had a single SPT. SPTs were more frequently oval (12/21; 57%), predominantly solid (12/21; 57%), fully encapsulated (16/21; 76%), larger than 30 mm (21/21; 100%), hypointense on T1-weighted MR images (21/21, 100%), hyperintense on T2-weighted MR images (21/21; 100%) and with an enhancing capsule after gadolinium-chelate administration (21/21; 100%).
  
  
  CONCLUSIONS
  There is trend of appearance for SPT of the pancreas on MR imaging but that variations may be observed in a number of cases. SPT uniformly presents as a single, well-demarcated and encapsulated pancreatic mass.
authors.affiliation: Department of Radiology, Centre Pierre et Marie Curie, Place du 1er Mai, 16016 Alger, Algeria. Electronic address: docyoucef05@yahoo.fr.
authors.forename: Youcef
authors.initials: Y
authors.lastname: Guerrache
authors.affiliation: Department of Abdominal Imaging, Hôpital Lariboisière-APHP, 2, rue Ambroise Paré, 75010 Paris, France; Université Paris-Diderot, Sorbonne Paris Cité, 10 Avenue de Verdun, 75010 Paris, France. Electronic address: philippe.soyer@lrb.aphp.fr.
authors.forename: Philippe
authors.initials: P
authors.lastname: Soyer
authors.affiliation: Department of Abdominal Imaging, Hôpital Lariboisière-APHP, 2, rue Ambroise Paré, 75010 Paris, France; Université Paris-Diderot, Sorbonne Paris Cité, 10 Avenue de Verdun, 75010 Paris, France. Electronic address: anthony.dohan@lrb.aphp.fr.
authors.forename: Anthony
authors.initials: A
authors.lastname: Dohan
authors.affiliation: Department of Radiology, Centre Pierre et Marie Curie, Place du 1er Mai, 16016 Alger, Algeria. Electronic address: faraounsid@yahoo.fr.
authors.forename: Sid Ahmed
authors.initials: SA
authors.lastname: Faraoun
authors.affiliation: Department of Radiology, CHU Nancy-Brabois, Allée du Morvan, 54511 Nancy cedex, France. Electronic address: v_croiselaurent@yahoo.fr.
authors.forename: Valérie
authors.initials: V
authors.lastname: Laurent
authors.affiliation: Department of Radiology, CHU Poitiers, 2 rue de la Milétrie, 86000 Poitiers, France. Electronic address: Jean-Pierre.TASU@chu-poitiers.fr.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Tasu
authors.affiliation: Department of Radiology, CHU d'Angers, 4 rue Larrey, 49933 Angers Cedex 9, France. Electronic address: ChAube@chu-angers.fr.
authors.forename: Christophe
authors.initials: C
authors.lastname: Aubé
authors.affiliation: Department of Radiology, Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75012, Paris, France. Electronic address: julien.cazejust@sat.aphp.fr.
authors.forename: Julien
authors.initials: J
authors.lastname: Cazejust
authors.affiliation: Department of Radiology, Centre Pierre et Marie Curie, Place du 1er Mai, 16016 Alger, Algeria. Electronic address: mourad.boudiaf@lrb.aphp.fr.
authors.forename: Mourad
authors.initials: M
authors.lastname: Boudiaf
authors.affiliation: Department of Radiology, Hôpital Robert Debré, 11 Boulevard Pasteur, 51092 Reims, France. Electronic address: choeffel-fornes@chu-reims.fr.
authors.forename: Christine
authors.initials: C
authors.lastname: Hoeffel
mesh_terms: D000293:Adolescent; D000328:Adult; D003287:Contrast Media; D005260:Female; D005682:Gadolinium; D019786:Gadolinium DTPA; D006801:Humans; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009375:Neoplasms, Glandular and Epithelial / Q000175:diagnosis* / Q000473:pathology*; D010179:Pancreas / Q000473:pathology; D010190:Pancreatic Neoplasms / Q000175:diagnosis* / Q000473:pathology*; D012189:Retrospective Studies; D055815:Young Adult
chemical_list: D003287:Contrast Media; D005682:Gadolinium; D019786:Gadolinium DTPA
keywords: Diagnostic imaging; MR imaging; Pancreatic neoplasms/pathology; Pancreatic tumors; Pseudopapillary tumor; Solid