Five hyperplastic outgrowth lines were developed by serial transplantation of hyperplastic alveolar nodules from BALB/cfC3H mice into BALB/c hosts. The lines were used to study the biology, morphology, and virology of premalignant tissue originating in mouse mammary tumor virus (MuMTV)-positive animals. The five lines differed with respect to tumor potential and growth characteristics, corrobor...

Pseudomelanosis is a rare endoscopic finding of the upper gastrointestinal tract characterized by hemosiderin deposits in histiocytes of lamina propria. We report a case of 72-year-old lady on chronic oral iron supplementation diagnosed with gastric hyperplastic polyps with background pseudomelanosis of stomach and duodenum. Concomitant occurrence of gastric pseudomelanosis, duodenal pseudomela...

A case of gastric hyperplastic polyp with proliferation of xanthoma cells is reported. The patient was a 69-year-old man who visited our hospital for further evaluation of gastric polyps. Endoscopic examination of the upper digestive tract revealed multiple hyperplastic polyps in the gastric antrum. There was a pedunculated polyp with whitish yellow granules, 7 mm in diameter, arising from the ...

A technique for lectin-peroxidase histochemistry was adapted for the study of formalin fixed paraffin embedded colonic tissue. Ten lectins with differing carbohydrate binding specificity were tested against 20 normal rectal biopsy specimens and tissue from 19 colonic carcinomata, 19 tubular or tubulovillous adenomata, and 19 hyperplastic polyps. None of the normal rectal biopsy specimens bound ...

external root resorption of permanent teeth is a multifactorial process. several etiologic and predisposing factors have been related to external root resorption. idiopathic external root resorption is defined as cases of external root resorption without a distinct etiologic factor. this article presents an extensive idiopathic external root resorption of maxillary first molar with irreversible...

A gastric inverted hyperplastic polyp is a rare type of gastric polyp and is characterized by downward growth of a variety of mucosal components into the submucosa. The polyp consists of columnar cells resembling foveolar epithelium and pyloric gland epithelium and can coexist with gastritis cystica profunda. Frequently, adenocarcinoma can coexist, but the relation is not clear. A 77-year-old m...

Background Smoking has consistently been associated with the development of polyps in the colorectum. However the association between smoking and cancer of the colorectum is less than consistent, a phenomenon known as “the smoking paradox”. Recently, it has been demonstrated that the link between smoking and polyps is strongest in hyperplastic polyps, and in the subset of cancers which develop ...

Evaluation of enlarged follicles with unerupted teeth is always important because some changes may occur. One of the ex-tremely rare conditions seen in dental follicles is multiple calcifying hyperplastic dental follicle. We report a case of multi-ple calcifying hyperplastic dental follicle. Radiographs showed that mandibular third molars had a pericoronal radiolucent zone delineated by a well-...

Hyperplastic polyps are lesions that are mostly smaller than 1 cm; they are sessile and innocuous. They develop as a result of tissue damage and an exaggerated mucosal regeneration. Intestinal metaplasia and dysplasia at a rate of 1–20% may be seen in hyperplastic polyps. However, the risk of carcinoma development is less than 2%. The risk increases in multiple polyps (1). Here we present a cas...