A Gutíerrez-Hoyos

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Forty biopsies from 36 patients with bladder tumors were tested for T-antigen (TAg) expression on tumor cells on sections untreated or treated with neuraminidase; a 37.5% of tumors showed abnormal expression of TAg either as an aberrant expression, or absence of this antigen after removing sialic acid. These changes were not well correlated with histologic(More)
Alterations in the expression of type 1 blood group-related antigens (Lewis a and b) were examined immunohistochemically in 371 consecutives gastric biopsy and 80 surgical specimens from patients of gastric carcinoma. The ABH and Lewis phenotype and secretor status of the patients were correlated with histologic findings. An anomalous expression of Lewis a(More)
The distribution of the blood group-related antigens type 1 (Lewis(a) [Le(a)], Lewis(b) [Le(b)]) and type 2 (H type 2, Y) has been examined in histologically normal and malignant mucosa of 40 surgical specimens of patients with adenocarcinoma of the stomach, with the use of a panel of monoclonal antibodies. Patients' Lewis phenotype and secretor status are(More)
Expression of type 1 and type 2 chain Lewis antigens was studied in 32 rectal adenocarcinoma specimens; the results were correlated with the patients' Lewis phenotype and secretor status. In addition, the pattern of expression of these antigens was analyzed in adjacent and distant normal mucosa. We used an indirect immunofluorescence technique with(More)
A four-year-old boy was explored for bilateral cryptorchidism. Operation led to the discovery of two intraabdominal testes with their corresponding vasa, two Fallopian tubes and a small uterus. No urological anomalies were found except for a vesico-ureteral reflux. Cystourethroscopy revealed a normal male tract. Sexual chromatine was negative and karyotype(More)
Due to the diversity of the biologic behaviour of the low-grade and low-stage superficial bladder carcinomas, particularly those that present a high recurrence rate, most of the research has been oriented towards finding prognostic markers of recurrence and future invasion of the tumor. Among these markers there are two that have demonstrated their(More)
Three cases of mesenteric cystic lymphangiomas in children are reported. All of them were found during laparotomies for acute abdomen, and their pathology was rather similar, except for the contents which was chylous in the two cases located in the jejunum and serous in the remaining ileal case. One of these tumours contained calcified material, a fact(More)
The surface epithelium of normal gastric mucosa from patients with gastric adenocarcinoma expressed the type 1 blood group precursor only in Lewis (Le) non-secretor individuals, Le a+b- (se/se, Le/-) and Le a-b- (se/se, le/le). In secretors, the superficial mucosa was negative. Deep areas of the mucosa showed no type 1 precursor regardless of secretor(More)