title: EUS staging of upper GI malignancies: results of a prospective randomized trial.
abstract: BACKGROUND
  Electronic 270 degrees transverse-array EUS (TA-EUS) provides high-quality cross-sectional images but cannot guide FNA. Linear EUS (L-EUS) provides longitudinal images of malignancies and the ability to guide FNA.
  
  
  OBJECTIVE
  We conducted a prospective randomized comparison of TA-EUS and L-EUS for the staging of upper-GI (UGI) malignancies.
  
  
  METHODS
  Forty-three patients underwent L-EUS immediately followed by TA-EUS (N = 27, 63%) or TA-EUS immediately followed by L-EUS (N = 16, 37%).
  
  
  METHODS
  Forty-three subjects (mean age, 64 years; 37 men) with an UGI malignancy (4 stomach and 38 esophageal) were evaluated with both TA-EUS and L-EUS.
  
  
  METHODS
  Abnormal lymph nodes were sampled by FNA for cytology.
  
  
  RESULTS
  There was agreement on the T stage by linear and radial techniques in 38 of 43 subjects (88%). Twenty-seven of 43 patients (63%) had abnormal lymph nodes by linear or transverse-array imaging. L-EUS demonstrated 66 abnormal lymph nodes in 27 subjects (average of 2.4 nodes/subject). TA-EUS demonstrated 90 abnormal lymph nodes in 27 subjects (average of 3.3 nodes/subject, P = .009, compared with L-EUS). In 16 of the 27 subjects, an FNA was performed, which was positive in 13 cases (81%) and negative in 3 cases (10%) for malignancy.
  
  
  CONCLUSIONS
  TA-EUS and L-EUS provide similar results of T staging of UGI malignancies. However, the number of abnormal lymph nodes detected by TA-EUS was more than by L-EUS. These findings suggest that radial or transverse-array EUS imaging should be the primary method for staging of UGI malignancies.
authors.affiliation: Gastrointestinal Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.
authors.forename: Kai
authors.initials: K
authors.lastname: Matthes
authors.forename: Brenna C
authors.initials: BC
authors.lastname: Bounds
authors.forename: Kerry
authors.initials: K
authors.lastname: Collier
authors.forename: Alexandra
authors.initials: A
authors.lastname: Gutierrez
authors.forename: William R
authors.initials: WR
authors.lastname: Brugge
mesh_terms: D000368:Aged; D044963:Biopsy, Fine-Needle / Q000295:instrumentation; D019160:Endosonography / Q000295:instrumentation*; D004867:Equipment Design; D004938:Esophageal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D004947:Esophagus / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000000981:diagnostic imaging / Q000473:pathology; D008207:Lymphatic Metastasis / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D013270:Stomach / Q000000981:diagnostic imaging / Q000473:pathology; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D014159:Transducers