The Evaluation of Magnetic Resonance Imaging for Diagnosis of Lymphnode Metastasis of Colorectal Carcinoma

Masahiro Yoshida, Masahiko Ozaki, Hiroshi Yamamoto, Takamitus Ariga, Shinichi Okazumi, Yasuhisa Abe, Wataru Takayama, Shigeru Yamada, Yoshio Koide, Kaichi Isono, Munemasa Ryu*

Second Department of Surgery, Chiba University Medical School
The Division of Gastroenterology, Chiba Cancer Center Hospital*

Magnetic resonance imaging (MRI) was evaluated for diagnosing lymphnode metastasis of colorectal carcinoma in 26 patients (9 with ascending, transverse and descending colon carcinoma, 17 with rectosigmoid carcinoma). The detectability of lymph node near A. colica dextra, media and sinistra is not so good. The lymph nodes around the aorta were clearly detected by coronal and sagittal images. The lymph nodes around the intrapelvic arteries were detected by oblique images. The detectability of lymph nodes around the aorta and intrapelvic arteries is 24% in 0-5 mm nodes, 89% in 5.1-10 mm nodes and 100% in over 10 mm nodes. Metastatic lymph nodes were detected by MRI at a 94% rate. Using this method, it is easy to detect lymph nodes, and MRI should be quite useful for determining lymphadenectomy.

Reprint requests
Masahiro Yoshida Second Department of Surgery, Chiba University Medical School
1-8-1 Inohana, Chiba, 280 JAPAN

Accepted
November 8, 1989

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