title: [Comprehensive application of CT and PET/CT in diagnosing colorectal mucinous and non-mucinous adenocarcinoma].
abstract: OBJECTIVE
  To explore the value of comprehensive application of CT and PET/CT in differential diagnosing mucinous and non-mucinous colorectal adenocarcinoma.
  
  
  METHODS
  CT and PET/CT image data of 37 patients with mucinous adenocarcinoma and 50 patients with non-mucinous adenocarcinoma confirmed by pathology in our hospital from January 2010 to December 2012 were analyzed retrospectively. Differences of image were compared between two methods.
  
  
  RESULTS
  On CT, lesion density of pre-contrast, pro-contrast phase and enhancement degree were significantly lower in mucinous adenocarcinoma than those in non-mucinous adenocarcinoma(all P<0.01). Enhancement degree of hypointense area, hypointense area proportion of total lesion, and lymphatic or distant metastasis ratio were significantly higher in mucinous adenocarcinoma than those in non-mucinous adenocarcinoma(all P<0.05). On PET/CT, maximal SUV value of mucinous adenocarcinoma was significantly lower as compared to non-mucinous adenocarcinoma[(8.64±4.34) Bq/L vs. (12.38±5.96) Bq/L, P=0.015].
  
  
  CONCLUSIONS
  CT combined with PET/CT provides better valuable information in differential diagnosing between mucinous and non-mucinous colorectal adenocarcinoma and clinical practice.
authors.affiliation: Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510800, China. canhuisun@sina.com.
authors.forename: Siyun
authors.initials: S
authors.lastname: Huang
authors.forename: Canhui
authors.initials: C
authors.lastname: Sun
authors.forename: Xuehua
authors.initials: X
authors.lastname: Li
authors.forename: Jian
authors.initials: J
authors.lastname: Guan
authors.forename: Shiting
authors.initials: S
authors.lastname: Feng
authors.forename: Zhenpeng
authors.initials: Z
authors.lastname: Peng
authors.forename: Ziping
authors.initials: Z
authors.lastname: Li
authors.forename: Junfei
authors.initials: J
authors.lastname: Meng
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging*; D002288:Adenocarcinoma, Mucinous / Q000000981:diagnostic imaging*; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging*; D006801:Humans; D064847:Multimodal Imaging; D049268:Positron-Emission Tomography; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed