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Biomedical subjects

C Montero

Publications and source records attributed to C Montero.

At least 73 records · Page 4Linked to original sources
PubMed1983

Histochemical characterization of different types of intestinal metaplasia in gastric mucosa.

The histochemical patterns of mucosubstances in 1.010 intestinal metaplasia (IM) foci in stomachs removed during surgery for benign ulcer and carcinoma has been studied. Two kinds of IM were characterized: the complete and the incomplete types, with the first one subdivided in Small intestine Type I, Small intestine Type II, and Colonic type, based on their similarity of mucosubstances, with those found in normal small intestine and colon, and the second one divided in two groups, depending on the presence or absence of sulfomucins. The incomplete type with sulfomucins was significantly more frequent in patients with carcinoma than in benign ulcer cases (P less than 0.001) as well as, in stomachs bearing intestinal type of carcinoma than in stomachs with diffuse type of carcinoma (P less than 0.005). The significance of the different types of IM, in relation to the gastric pathologic findings is discussed.

Gastric Mucosa↗
PubMed1983

Comparative electrophysiological evaluation of atrial activation and sinoatrial node function following Senning and Mustard procedures: an experimental study.

We compared several electrophysiological variables before and after Mustard and Senning procedures in 14 mongrel dogs and made the following three observations. First, after the Senning operation, the atrial activation in the areas of the anterior and middle internodal tracts is undamaged. After the Mustard procedure, however, conduction through the interatrial septum is practically abolished. Both techniques damage the area of the posterior internodal tract. On the whole, there is greater dispersion of atrial epicardial mapping with the Senning operation. Second, several degrees of depression in the sinus node automatism and intraatrial conduction were observed with both techniques. Third, atrioventricular block in various degrees was observed only after the Mustard procedure. The atrioventricular dissociation observed after the Senning operation was dependent on sinus pacemaker dysfunction only. We think that from the electrophysiological point of view, the Senning procedure is a valid alternative for repair of transposition of the great arteries.

Animals↗
PubMed1982

Ultrastructural study of the epithelial mucous cells in lizards (Lacertilia).

An ultrastructural study of the mucous cells of the intestinal epithelium of four lacertilian species (Lacerta lepida, Lacerta hispanica, Psammodromus algirus and Acanthodactylus erythrurus) is here reported. Two types of mucous cells have been found in these species: common mucous cells and granular mucous cells. Immature and mature forms of both types have been observed. The common mucous cells or typical goblet cells have the same characteristics in all four species. The granules of the granular mucous cells of the two species of lacerta are similar but differ from those of the other two species.

Animals↗
PubMed1980

Progressive bulbar paralysis associated with neural deafness. A nosological entity.

A complete autopsy verification of progressive bulbar palsy associated with neural deafness was performed. Hearing loss and speech difficulties developed in a five-year-old girl. When she was 24 years old, clinical examination demonstrated deafness and bulbopontine paralysis together with retinitis pigmentosa, peripheral amyotrophies, pyramidal signs, and ataxia. The patients died at 27 years and the autopsy disclosed degenerative changes characterized by simple atrophy and loss of neurons accompanied by gliosis and loss of myelinated fibers. The structures principally affected were the anterior horns and the motor nuclei of the brain stem together with the eighth cranial nerve nuclei. Loss of myelinated fibers was found in the spinocerebellar and pyramidal tracts and in the fasciculus gracilis. Our study suggests that progressive bulbar paralysis with neural deafness should be considered as a nosological entity.

Adolescent↗
PubMed1980

Retrospective histochemical study of mucosubstances in adenocarcinomas of the gastrointestinal tract.

Use of the PATS/KOH/PAS and PB/KOH/PAS techniques and the diamine method (Spicer 1965) together with the demonstration of metachromasia with toluidine blue pH 3.0, for the study of carbohydrates in a retrospective study of gastric and colorectal adenocarcinomas, disclosed an increase in the sulphate content and the absence of O-acylated sialomucins in the majority of gastric adenocarcinomas. In the colorectal tumours there is no change in the degree of sulphation normally present in this area, but the degree of acylation of the sialic acid in adenocarcinoma is very different to that of normal mucosa and appears related to the degree of differentiation of the tumour. The mucosa adjacent to tumours from both areas were also studied, as well as gastric intestinal metaplasia.

Adenocarcinoma↗