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[Multiple trichodiscomas associated with colonic polyposis].

BACKGROUND
Trichodiscoma is an uncommon benign tumor of the pilosebaceous system.


CASE REPORT
An 83-year-old man had a past history of adenomatous polyps of the colon. The subject's brother had died from cancer of the colon. Over the past 4 years, the patient had developed approximately 30 small asymptomatic papulonodular tumors on the trunk. Skin biopsy demonstrated trichodiscomas.


DISCUSSION
Together with fibrofolliculomas and perifollicular fibromas, trichodiscomas are benign tumors of the pilosebaceous system. These different tumors may occur simultaneously as in Birt-Hogg-Dubé syndrome which associates trichodiscoma and familial colonic polyposis. This combination has only been reported in Birt-Hogg-Dubé syndrome or with perifollicular fibromas.


CONCLUSION
This case suggests that patients with hamartomas of the pilosebaceous system should undergo explorations in search for digestive tract polyposis.