title: MRI for differentiating primary fallopian tube carcinoma from epithelial ovarian cancer.
abstract: OBJECTIVE
  To compare potential discriminatory magnetic resonance imaging (MRI) features of primary fallopian tube carcinoma (PFTC) and primary epithelial ovarian cancer (EOC).
  
  
  METHODS
  MRI features (the laterality, shape, size, signal intensity, enhancement of solid portion, amount of ascites, peritoneal planting, lymph nodes, or distant metastasis) of 27 tumors in 23 patients with PFTC confirmed by surgery and pathology were compared with 42 tumors in 37 patients with EOC.
  
  
  RESULTS
  The mean maximum diameter was 6.1 ± 0.7 cm in PFTC versus 10.2 ± 0.6 cm in EOC. MRI features of PFTC were sausage-like shape (19/27, 70%), or irregular (8/27, 30%) shape; solid (20/27, 74%) or cystic-solid (7/27, 26%) mass; homogeneous (21/27, 78%) or heterogeneous (6/27, 22%) signal on T2 -weighted images; mild (8/27, 30%), moderate (13/27, 48%), or prominent (6/27, 22%) enhancement; associated hydrosalpinx (13/27, 48%) or intrauterine fluid accumulation (7/23, 30%). Significant differences between PFTC and EOC were found in the size, shape, configuration, signal homogeneity, and enhancement pattern, associated hydrosalpinx, and intrauterine fluid accumulation (P < 0.001, < 0.001, 0.015, 0.001, < 0.001, < 0.001, and 0.001, respectively).
  
  
  CONCLUSIONS
  PFTC often appears as a small-sized solid mass, with a sausage-like shape, homogeneous signal, mild or moderate enhancement, hydrosalpinx, or intrauterine fluid accumulation. Our preliminary study shows that MRI can identify the characteristic features of PFTC and differentiate PFTC from EOC.
authors.affiliation: Department of Radiology, Jinshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
authors.forename: Feng Hua
authors.initials: FH
authors.lastname: Ma
authors.affiliation: Department of Radiology, Jinshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
authors.forename: Song Qi
authors.initials: SQ
authors.lastname: Cai
authors.affiliation: Department of Radiology, Jinshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
authors.forename: Jin Wei
authors.initials: JW
authors.lastname: Qiang
authors.affiliation: Department of Radiology, Jinshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
authors.forename: Shu Hui
authors.initials: SH
authors.lastname: Zhao
authors.affiliation: Department of Pathology, Obstetrics & Gynecology Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
authors.forename: Guo Fu
authors.initials: GF
authors.lastname: Zhang
authors.affiliation: Department of Pathology, Obstetrics & Gynecology Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
authors.forename: Ya Min
authors.initials: YM
authors.lastname: Rao
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000077216:Carcinoma, Ovarian Epithelial; D003937:Diagnosis, Differential; D005185:Fallopian Tube Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D009375:Neoplasms, Glandular and Epithelial / Q000473:pathology*; D015588:Observer Variation; D010051:Ovarian Neoplasms / Q000473:pathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
keywords: epithelial ovarian carcinoma; magnetic resonance imaging; primary fallopian tube carcinoma