title: Transanal endoscopic versus total mesorectal laparoscopic resections of T2-N0 low rectal cancers after neoadjuvant treatment: a prospective randomized trial with a 3-years minimum follow-up period.
abstract: BACKGROUND
  This study aimed to compare the results and the oncologic outcomes of transanal endoscopic microsurgery (TEM) with neoadjuvant radiochemotherapy and laparoscopic resection (LR), also with neoadjuvant radiochemotherapy, in the treatment of T(2)-N(0) low rectal cancer.
  
  
  METHODS
  The study enrolled 40 patients with T2-N(0) rectal cancer, randomizing 20 to TEM (arm A) and 20 to LR (arm B).
  
  
  RESULTS
  After neoadjuvant radiochemotherapy, tumor downstaging was observed for 13 patients (65%) in arm A (7 pT0 and 6 pT1) and in 11 patients (55%) in arm B (7 pT0 and 4 pT1). More than a 50% reduction of the tumor diameter was observed in four arm A cases and in six arm B cases. At a median follow-up period of 56 months (range, 44-67 months) in both arms, one local failure (5%) occurred after 6 months in arm A and one (5%) after 48 months in arm B. Distant metastases occurred in one arm A patient (5%) after 26 months of follow-up evaluation and in one arm B patient (5%) at 31 months. The probability of local or distant failure was 10% for TEM and 12% for laparoscopic resection, whereas the probability of survival was 95% for TEM and 83% for laparoscopic resection.
  
  
  CONCLUSIONS
  The findings show comparative results between the two study arms in terms of probability of failure and survival.
authors.affiliation: Department of General Surgery, Surgical Specialties and Organ Transplantation Paride Stefanini, University of Rome La Sapienza, Rome, Italy. emanuele.lezoche@uniromal.it
authors.forename: E
authors.initials: E
authors.lastname: Lezoche
authors.forename: M
authors.initials: M
authors.lastname: Guerrieri
authors.forename: A M
authors.initials: AM
authors.lastname: Paganini
authors.forename: G
authors.initials: G
authors.lastname: D'Ambrosio
authors.forename: M
authors.initials: M
authors.lastname: Baldarelli
authors.forename: G
authors.initials: G
authors.lastname: Lezoche
authors.forename: F
authors.initials: F
authors.lastname: Feliciotti
authors.forename: A
authors.initials: A
authors.lastname: De Sanctis
mesh_terms: D000368:Aged; D001003:Anal Canal; D017024:Chemotherapy, Adjuvant; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D010535:Laparoscopy / Q000379:methods; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011351:Proctoscopy / Q000379:methods; D011446:Prospective Studies; D018714:Radiotherapy, Adjuvant; D012004:Rectal Neoplasms / Q000188:drug therapy / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery*; D013997:Time Factors