Preoperative chest computerized tomography in patients with locally advanced mid or lower rectal cancer: its role in staging and impact on treatment strategy.
OBJECTIVE
Pulmonary metastasis is frequent in rectal cancer. Some guidelines recommend chest computerized tomography (CT) for preoperative workup in rectal cancer patients, which have no solid evidence to support this recommendation. This study was designed to evaluate the role of chest CT on preoperative staging in rectal cancer patients and to assess the impact on treatment strategy.


METHODS
Data were prospectively collected from 103 clinically T3/T4 mid or lower rectal cancer patients who had chest X-ray (CXR) and CT to evaluate lung metastasis. The chest images were classified into four groups: metastasis, indeterminate, benign, and negative. Patients showing indeterminate lesions had follow-up CTs at 3- to 6-month intervals.


RESULTS
Nine patients (8.7%) had pulmonary metastases detected on CT. CXR did not reveal any pulmonary metastatic lesions in four of the nine patients. Of these four, treatment was changed in three patients because of these findings. Forty (38.8%) patients had indeterminate nodules on chest CT. Of these, 37 patients had follow-up CTs and four patients (10.8%) showed interval changes that were confirmed as pulmonary metastasis.


CONCLUSIONS
It seems reasonable to perform chest CT for preoperative staging in patients with T3/T4 mid or lower rectal cancer.
Choi
Dong Jin
DJ
Department of Surgery, Sun General Hospital, Daejeon, Korea.
Kwak
Jung Myun
JM
Kim
Jin
J
Woo
Si Uk
SU
Kim
Seon Hahn
SH
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging / Q000379:methods*; D011300:Preoperative Care; D013902:Radiography, Thoracic; D012004:Rectal Neoplasms / Q000473:pathology*; D014057:Tomography, X-Ray Computed