title: Release of band cells from the bone marrow is impaired by preoperative chemoradiation in patients with esophageal carcinoma: increased risk of postoperative pneumonia.
abstract: OBJECTIVE
  To examine the difference in hematological data and postsurgical course after esophagectomy between patients receiving preoperative chemoradiation and patients without preoperative treatment.
  
  
  METHODS
  Twenty-two patients with squamous cell carcinoma of the esophagus who underwent esophagectomy during the past 2 years were retrospectively analyzed in the study. Six patients had preoperative chemoradiation (CRT group) and 16 patients had no preoperative treatment (non-CRT group). The hematological data, postoperative course, and surgical complications were compared between the two groups.
  
  
  RESULTS
  Patients in the CRT group were given cisplatin and 5-FU (143 and 6,000 mg on average, respectively) plus an average of 35 Gy of radiation. Although the neutrophil count did not show a significant difference between the two groups, the band cell count was lower in the CRT group compared with the non-CRT group on postoperative day 1 (P<0.05). Postoperative pneumonia was detected in three patients (50%) from the CRT group versus none of the non-CRT group.
  
  
  CONCLUSIONS
  Preoperative CRT may be a risk factor for postoperative pneumonia in patients with esophageal carcinoma who undergo esophagectomy. The normal bone marrow response of releasing band cells from the postmitotic marrow pool after surgery could be disturbed by CRT, which might contribute to an increase in later pulmonary complications.
authors.affiliation: Mito Red Cross Hospital, 3-12-48 Sannomaru, Mito, Ibaraki 310-0011, Japan. tatsushisuwa@hotmail.com
authors.forename: Tatsushi
authors.initials: T
authors.lastname: Suwa
authors.forename: Yuko
authors.initials: Y
authors.lastname: Kitagawa
authors.forename: Takahiro
authors.initials: T
authors.lastname: Sasaki
authors.forename: Tomoo
authors.initials: T
authors.lastname: Shatari
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Sakuma
authors.forename: Masaki
authors.initials: M
authors.lastname: Kitajima
mesh_terms: D000368:Aged; D001853:Bone Marrow / Q000187:drug effects / Q000276:immunology* / Q000528:radiation effects; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy / Q000532:radiotherapy / Q000601:surgery*; D002945:Cisplatin / Q000627:therapeutic use; D003131:Combined Modality Therapy / Q000009:adverse effects; D004938:Esophageal Neoplasms / Q000188:drug therapy / Q000532:radiotherapy / Q000601:surgery*; D016629:Esophagectomy; D005260:Female; D006801:Humans; D007958:Leukocyte Count; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009504:Neutrophils / Q000187:drug effects / Q000528:radiation effects; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology*; D011300:Preoperative Care / Q000009:adverse effects; D012189:Retrospective Studies; D012307:Risk Factors
chemical_list: D002945:Cisplatin