Usefulness of the high-frequency ultrasound probe in pretherapeutic staging of superficial-type colorectal tumors.
We evaluated the usefulness of the high-frequency ultrasound probe (HFUP, 20 MHz) to determine the depth of tumor invasion in 45 patients with superficial colorectal tumors. The correct diagnostic rate was 66% (30/45) when the depth of tumor invasion was classified into the following 6 layers: mucosa (m), upper 1/3 (sm1), middle 1/3 (sm2), and lower 1/3 (sm3) areas of the submucosa, muscularis propria (mp), and the subserosa or deeper areas (s). However, when the depth of tumor invasion was evaluated in 3 layers (m-sm1, sm2-sm3, and mp-deeper layer), which is the classification used to select cases for endoscopic mucosal resection, the correct diagnostic rate was 88.9% (40/45). These results suggest that the HFUP is useful to determine the depth of invasion to select treatment for superficial colorectal tumors.
Tsuruta
O
O
Department of Medicine II, Kurume University School of Medicine, Kurume City 830-0011, Japan.
Kawano
H
H
Fujita
M
M
Tsuji
Y
Y
Miyazaki
S
S
Fujisaki
K
K
Watanabe
M
M
Nakahara
K
K
Tateishi
H
H
Ban
S
S
Ikeda
H
H
Takeda
T
T
Sata
M
M
Toyonaga
A
A
D000368:Aged; D003106:Colon / Q000000981:diagnostic imaging / Q000473:pathology; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D004724:Endoscopy; D019160:Endosonography / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D011446:Prospective Studies; D015203:Reproducibility of Results