Endorectal Ultrasonography using Emulsified Olive Oil Enema (OE-ERU) for the Preoperative Detection of Perirectal Lymph Node Metastasis from Rectal Cancer

Yoshihide Ushitani, Hidetaka Mochizuki, Shoetsu Tamakuma

First Department of Surgery, National Defense Medical College

The usefulness of OE-ERU in improving the preoperative diagnosis of perirectal lymph node metastasis from rectal cancer was evaluated in comparison with conventional ERU. With OE-ERU, the detection rate of perirectal lymph node and average number of perirectal lymph nodes detected per patient increased considerably, from 39% and 0.4/patient to 73% and l.3/patient, respectively. Diagnostic accuracy and sensitivity with respect to lymph node metastasis also improved, from 70.4% and 59.5% to 87.5% and 92.0% respectively. Out of 21 cases in which perirectal lymph nodes were detected by OE-ERU alone, lymph node metastasis was observed histologically in 10. It was concluded that OE-ERU appears to be useful in improving the preoperative diagnosis of perirectal lymph node metastasis.

Key words
endorectal ultrasonography, emulsified olive oil enema, perirectal lymph node metastasis

Reprint requests
Yoshihide Ushitani First Department of Surgery, National Defense Medical College
3-2, Tokorozawa-shi, 359 JAPAN

Accepted
December 10, 1991

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