Inflammatory myoglandular polyp is an uncommon benign colorectal polyp. We treated
nine cases of histologically verified inflammatory myoglandular polyp. The polyps
were identified as a pedunculated protrusion located in the distal part of the large
intestine. On colonoscopy, eight polyps had a smooth, spherical, and hyperemic surface,
accompanied by a patchy mucous exudate. Magnification endoscopy revealed a rugged
surface composed of smooth nodules. These colonoscopic findings corresponded to hyperplastic
glands with occasional cystic dilation and inflamed stroma with proliferation of smooth-muscle
fibers. Inflammatory myoglandular polyp appears to be a distinctive clinical entity,
with a unique appearance on colonoscopy.
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T. Moriyama, M.D.
Dept. of Medicine and Clinical Science · Graduate School of Medical Sciences · Kyushu
University
Maidashi 3-1-1, Higashi-ku · Fukuoka 812-8582 · Japan
Fax: + 81-92-642-5273 ·
Email: morimori@intmed2.med.kyushu-u.ac.jp