title: Staging of invasive cervical carcinoma and of pelvic lymph nodes by high resolution MRI with a phased-array coil in comparison with pathological findings.
abstract: OBJECTIVE
  Our goal was to stage invasive cervical carcinoma (pT1b-pT4a) and pelvic lymph nodes by high resolution MRI with a circularly polarized (cp) phased-array coil in correlation with the whole-mount specimen and the histopathological findings.
  
  
  METHODS
  Thirty-three patients (20-68 years old; mean age 55 years) with biopsy-proven primary cancer of the cervix were prospectively examined on a 1.5 T scanner by using a cp body phased-array coil. The MR protocol consisted of high resolution T2-weighted turbo-SE (TSE) and pre- and postcontrast T1-weighted SE (SE) sequences. Slice thickness was 5-7 mm with a pixel size of 0.3-0.4 mm2. All MRI findings were matched to the whole-mount specimens and the histopathological findings.
  
  
  RESULTS
  Pathological stages evaluated were pT1b (n = 5), pT2b (n = 16), and pT4a (n = 12). The overall accuracy rates for tumor staging were 79% for high resolution T2-weighted TSE and 76% for postcontrast T1-weighted SE images. The accuracy for high resolution T2-weighted TSE images in determining parametrial infiltration, pelvic side wall, and bladder and rectal wall infiltration was 84, 87, and 87%, respectively. In prospective analysis of the 1.0 cm criterion for diagnosis of a positive pelvic lymph node, MRI had a 72% accuracy, a 68% sensitivity, and a 78% specificity.
  
  
  CONCLUSIONS
  High resolution MRI with a cp body phased-array coil provides excellent and robust high resolution images in patients with invasive cervical carcinoma. However, accuracy, specificity, and sensitivity for staging invasive cervical carcinoma and pelvic lymph nodes with correlation to whole-mount specimens and histopathological findings did not improve compared with the results in the literature using a body coil with thicker slices and a lower spatial resolution.
authors.affiliation: Department of Radiological Diagnostics and Therapy, German Cancer Research Center, Heidelberg, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Hawighorst
authors.forename: S O
authors.initials: SO
authors.lastname: Schoenberg
authors.forename: P G
authors.initials: PG
authors.lastname: Knapstein
authors.forename: M V
authors.initials: MV
authors.lastname: Knopp
authors.forename: U
authors.initials: U
authors.lastname: Schaeffer
authors.forename: M
authors.initials: M
authors.lastname: Essig
authors.forename: G
authors.initials: G
authors.lastname: van Kaick
mesh_terms: D000328:Adult; D000368:Aged; D001706:Biopsy; D002277:Carcinoma / Q000175:diagnosis* / Q000556:secondary; D002278:Carcinoma in Situ; D005260:Female; D006801:Humans; D007089:Image Enhancement; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D010388:Pelvis; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012004:Rectal Neoplasms / Q000175:diagnosis; D012680:Sensitivity and Specificity; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis; D002583:Uterine Cervical Neoplasms / Q000175:diagnosis*