title: Utility of preoperative ferumoxtran-10 MRI to evaluate retroperitoneal lymph node metastasis in advanced cervical cancer: Results of ACRIN 6671/GOG 0233.
abstract: OBJECTIVE
  To assess if ferumoxtran-10 (f-10) improves accuracy of MRI to detect lymph node (LN) metastasis in advanced cervical cancer.
  
  
  METHODS
  F-10 MRI component of an IRB approved HIPAA compliant ACRIN/GOG trial was analyzed. Patients underwent f-10 MRI followed by extra-peritoneal or laparoscopic pelvic and abdominal lymphadenectomy. F-10-sensitive sequences were T2* GRE sequences with TE of 12 and 21. Seven independent blinded readers reviewed f-10-insensitive sequences and all sequences in different sessions. Region correlations were performed between pathology and MRI for eight abdomen and pelvis regions. Sensitivity and specificity were calculated at participant level. Reference standard is based on pathology result of surgically removed LNs.
  
  
  RESULTS
  Among 43 women enrolled in the trial between September 2007 and November 2009, 33 women (mean age 49 ±11 years old) with advanced cervical cancer (12 IB2, 3 IIA, 15 IIB and 3 IIIB, 29 squamous cell carcinomas, 32 grade 2 or 3) were evaluable. Based on histopathology, LN metastasis was 39% in abdomen and 70% in pelvis. Sensitivity of all sequence review in pelvis, abdomen, and combined were 83%, 60%, and 86%, compared with 78%, 54%, and 80% for f-10 insensitive sequences (P: 0.24, 0.44 and 0.14, respectively). Mean diameter of the largest positive focus on histopathology was 13.7 mm in abdomen and 18.8 mm in pelvis (P= 0.018). Specificities of all sequence review in pelvis, abdomen, and combined were 48%, 75%, and 43%, compared with 75%, 83%, and 73% (P: 0.003, 0.14, 0.002 respectively) for f-10 insensitive sequences.
  
  
  CONCLUSIONS
  Addition of f-10 increased MRI sensitivity to detect LN metastasis in advanced cervical cancer. Increased sensitivity did not reach statistical significance and was at the expense of lower specificity.
authors.affiliation: Toronto General Hospital, Canada.
authors.forename: Mostafa
authors.initials: M
authors.lastname: Atri
authors.affiliation: Brown University, United States.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Brown University, United States.
authors.forename: Helga
authors.initials: H
authors.lastname: Marques
authors.affiliation: Brown University, United States.
authors.forename: Jeremy
authors.initials: J
authors.lastname: Gorelick
authors.affiliation: Massachusetts General Hospital, United States.
authors.forename: Mukesh
authors.initials: M
authors.lastname: Harisinghani
authors.affiliation: Royal Marsden Hospital, United Kingdom.
authors.forename: Aslam
authors.initials: A
authors.lastname: Sohaib
authors.affiliation: Royal Marsden Hospital, United Kingdom.
authors.forename: Dow-Mu
authors.initials: DM
authors.lastname: Koh
authors.affiliation: University of California at Los Angeles, United States.
authors.forename: Steven
authors.initials: S
authors.lastname: Raman
authors.affiliation: Massachusetts General Hospital, United States.
authors.forename: Michael
authors.initials: M
authors.lastname: Gee
authors.affiliation: MD Anderson Cancer Center, United States.
authors.forename: Haesun
authors.initials: H
authors.lastname: Choi
authors.affiliation: University of Oklahoma, United States.
authors.forename: Lisa
authors.initials: L
authors.lastname: Landrum
authors.affiliation: University of Oklahoma, United States.
authors.forename: Robert
authors.initials: R
authors.lastname: Mannel
authors.affiliation: Mount Sinai School of Medicine, United States.
authors.forename: Linus
authors.initials: L
authors.lastname: Chuang
authors.affiliation: Fox Chase Cancer Center, United States.
authors.forename: Jian Qin Michael
authors.initials: JQ
authors.lastname: Yu
authors.affiliation: Woman and Infants Hospital of Rhode Island, United States.
authors.forename: Carolyn Kay
authors.initials: CK
authors.lastname: McCourt
authors.affiliation: Vanderbilt University, United States.
authors.forename: Michael
authors.initials: M
authors.lastname: Gold
keywords: Cervical cancer; Ferumoxtran-10; Lymph node metastasis; MRI; USPIO