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Acta Pathol Jpn. 1984 Jan;34(1):11-7.

Clinico-pathological study of juvenile polyp of large intestine.


Although the difference of juvenile polyps between the childhood and adult groups was investigated, no significant difference could be pointed out both clinically and histologically. Since the polyps showing similar pathological findings were examined in the present investigation, it should be considered as a matter of course that no significant difference by age was pointed out. In a sense, these facts revealed the existence of a juvenile polyp which occurs in adult patients. In fact, the incidence of juvenile polyp which occurs in adult patients beyond the age of 20 has been estimated as 0 to 44% in the literature. If the term of juvenile polyp is not preferable in the adult cases, the term adult juvenile type polyp may be useful. Although several theories like as hamartoma, inflammation, allergy, etc. have been discussed for its histogenesis, it may be difficult to understand the histogenesis of juvenile polyps by a single theory.

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