Endoscopy 2001; 33(3): 237-240
DOI: 10.1055/s-2001-12798
Original Article
© Georg Thieme Verlag Stuttgart · New York

Preoperative Evaluation of Submucosal Invasive Colorectal Cancer Using a 15-MHz Ultrasound Miniprobe

N. Harada 1 , S. Hamada 1 , H. Kubo 1 , S. Oda 1 , Y. Chijiiwa 2 , T. Kabemura 3 , A. Maruoka 4 , K. Akahoshi 5 , T. Yao 6 , H. Nawata 1
  • 1 Dept. of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
  • 2 Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
  • 3 Dept. of Internal Medicine, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
  • 4 Dept. of Internal Medicine, Fukuoka City Hospital, Fukuoka, Japan
  • 5 Dept. of Gastroenterology, Aso-Iizuka Hospital
  • 6 Dept. of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
Further Information

Publication History

Publication Date:
31 December 2001 (online)

Background and Study Aims: Recently, it was reported that focal submucosal invasive colorectal cancer could be treated by polypectomy or endoscopic mucosal resection (EMR) because of the rarity of lymph-node metastasis. Our objective was to examine the accuracy and efficacy of a 15-MHz ultrasound miniprobe in the preoperative evaluation of the degree of submucosal invasion in colorectal cancer.

Patients and Methods: A total of 35 patients with submucosal invasive colorectal cancer who underwent ultrasonography with a miniprobe were studied prospectively. The results of this imaging were compared with the histologic findings in resected specimens.

Results: Although the accuracy of the miniprobe in categorizing submucosal invasion into three subclasses (SM1, invasion limited to the upper third; SM2, limited to the middle third; SM3, limited to the lower third) was low (37.1 %; 13/35), the accuracy in differentiation between ≤ SM1 (M and SM1) and ≥ SM2 (SM2, SM3, MP, and S) was 85.7 % (30/35).

Conclusions: The miniprobe can be useful for therapeutic decision-making in submucosal invasive colorectal cancer.

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N. Harada,M.D. 

Dept. of Medicine and Bioregulatory Science
Graduate School of Medical Sciences
Kyushu University

Fukuoka 812-8582, Japan


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