title: Short-term restaging of patients with non-small cell lung cancer receiving chemotherapy.
abstract: OBJECTIVE
  To determine whether computed tomography (CT) performed within a month of receiving chemotherapy is useful in assessing response among patients with non-small cell lung cancer (NSCLC).
  
  
  METHODS
  Consecutive patients receiving chemotherapy for NSCLC who underwent short-term CT restaging between April 2001 and June 2005 were included in the study. Serial CT scans were performed within 31 days (mean, 24 days; range, 9-31 days) after receiving chemotherapy for all patients. Tumors were measured in consensus by two diagnostic radiologists. Tumor response was assessed using uni-dimensional tumor measurements according to Response Evaluation Criteria in Solid Tumors criteria.
  
  
  RESULTS
  There were 57 patients in the study (30 men, 27 women; mean age, 63 years; age range, 37-85 years). Tumor histology included adenocarcinoma (n = 30), squamous cell carcinoma (n = 17), and NSCLC otherwise unspecified (n = 10). Clinical tumor, node, metastasis stage was stage II (n = 2), stage III (n = 11), and stage IV (n = 44). A significant change in tumor size was observed in eight patients (14%), with tumor regression in two (3%) and progression in six (11%). For these patients, CT scans were performed within 31 days (mean, 25 days; range, 17-31 days). Among the six patients with tumor progression, early detection of therapeutic failure resulted in a change or a discontinuation of chemotherapy for five.
  
  
  CONCLUSIONS
  Early restaging CT is useful in evaluating therapeutic response among patients with NSCLC and may allow the institution of more appropriate therapy.
authors.affiliation: Department of Diagnostic Imaging, M.D. Anderson Cancer Center, Houston, Texas 77030-4009, USA. jbruzzi@mdanderson.org
authors.forename: John F
authors.initials: JF
authors.lastname: Bruzzi
authors.forename: Mylene
authors.initials: M
authors.lastname: Truong
authors.forename: Ralph
authors.initials: R
authors.lastname: Zinner
authors.forename: Jeremy J
authors.initials: JJ
authors.lastname: Erasmus
authors.forename: Bradley
authors.initials: B
authors.lastname: Sabloff
authors.forename: Reginald
authors.initials: R
authors.lastname: Munden
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002289:Carcinoma, Non-Small-Cell Lung / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000473:pathology; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D049268:Positron-Emission Tomography; D014057:Tomography, X-Ray Computed
chemical_list: D019788:Fluorodeoxyglucose F18