We report a case of sigmoid colon cancer that was left untreated for a period of 4 years, because the patient declined treatment. A 59-year-old man was found to have an early carcinoma of the sigmoid colon measuring approximately 12 mm in diameter. The lesion, initially a flat cancer, increased in height and became sessile 4 months later. Subsequently, the central portion of the lesion became ulcerated, leaving an elevated ring along its periphery. The lesion eventually evolved into an ulcerated, invasive cancer. This sequence has not been observed with colonoscopy before.
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Dr. Y. Tomiki
First Dept. of Surgery
Juntendo University School of Medicine
2-1-1 Hongo
Bunkyo-ku
Tokyo 113-8421
Japan
Fax: Fax:+ 81-3-3814-9300
Email: E-mail:tomiki@muh.biglobe.ne.jp
