On re-examining 477 polyps of the colon obtained by endoscopic polypectomy, the authors describe a type of polyp with they have called hyperplasiogenous. This polyp is characterised by a proliferation of rectilinear glands, divided at their base, forming a connecting spur; this spur may form a more complex alveolar or tubulo-alveolar structure. The glands have cells with a tall, clear cytoplasm and a small, homogeneous nucleus with no irregularities or metaplasia. Endoscopically, they are small, sessile and either the same colour as the mucous membrane or redder. They are located mainly in the rectum and sigmoid colon. They are more frequently found in men and begin to appear after the age of thirty. They are often associated with tumours of the colon. The authors consider possible that the hyperplasiogenous polyp may represent an initial stage of adenoma.
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Frequency, location, and age and sex distribution of various types of gastric polyp.
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Data on the frequency and location of the various types of gastric polyps are highly inconsistent. In a retrospective analysis of 5515 gastric polyps obtained from 4852 patients in the period between 1969 and 1989, including reexamination of 197 surgical, 1572 polypectomy, and 3746 biopsy specimens, the most frequent types found were Elster's glandular cysts (fundic gland polyps) (47.0%), followed by hyperplasiogenous polyp (28.
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