[The criteria for avoiding unnecessary computerized tomography and bone scan in staging patients with newly diagnosed prostate cancer: retrospective study of patients at Matsusaka Chuo General Hospital].
OBJECTIVE
Staging for prostate cancer often includes computed tomography (CT) and bone scan in Japan. We examined the criteria of avoiding unnecessary CT and bone scan for the prostate cancer patients at Matsusaka Chuo General Hospital.


METHODS
211 patients were newly diagnosed at our institution between 1998 September and 2004 April. We reviewed data from 208 patients who had a staging CT and bone scan. The data was analysed using Gleason score, clinical T-stage and serum prostatic specific antigen (PSA) level.


RESULTS
CT detected lymphadenopathy in 19 patients (9.1%), Bone scan detected bone metastasis in 31 patients (14.9%). However there was no lymphadenopathy detected by CT in the patients with 20 ng/ml or less. In the analysis using PSA and Gleason score, there was no bone metastasis detected by bone scan in the patients with PSA level of 20 ng/ml or less and Gleason sum 7 or less. In the analysis using PSA and clinical local stage there was no bone metastasis detected by bone scan in the patients with PSA level of 20 ng/ml or less and localized lesion (cT1-2).


CONCLUSIONS
In a new proatate cancer patient CT and bone scan can be avoidable by PSA level of 20 ng/ml or less and cT1-2 or less and Gleason sum 7 or less.
Matsumura
Yoshiaki
Y
Department of Urology, Matsusaka Chuo General Hospital, Japan.
Otani
Takeshi
T
Yoneda
Tatsuo
T
Matsumoto
Yoshihiro
Y
Maruyama
Yoshio
Y
Fujimoto
Kiyohide
K
Hirao
Yoshihiko
Y
D000368:Aged; D001859:Bone Neoplasms / Q000000981:diagnostic imaging; D001842:Bone and Bones / Q000000981:diagnostic imaging*; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008206:Lymphatic Diseases / Q000000981:diagnostic imaging; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D017430:Prostate-Specific Antigen / Q000097:blood; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
D017430:Prostate-Specific Antigen