Search PubMed⌕ Search

Biomedical subjects

J Lindgren

Publications and source records attributed to J Lindgren.

51 records · Page 3Linked to original sources
PubMed1979

Carcinoembryonic antigen in endoscopic brush specimens from benign and malignant gastric lesions.

The measurement of carcinoembryonic antigen (CEA) in serum and endoscopic brush specimens was evaluated for the differential diagnosis of malignant and nonmalignant gastric disease. Brush specimens were studied from 33 patients with gastric cancer and 36 patients with benign gastric lesions or apparently normal gastric mucosa. Demonstrable CEA immunoreactivity was found by radioimmunoassay in brush specimens from 24/33 cancer patients (73%) and from 23/36 patients with benign lesions (64%). Patients with CEA+ tissue in the immunoperoxidase test had somewhat higher CEA concentrations in the brush specimens than cases with CEA- biopsy tissue, although overlap was considerable. Thirty-five per cent of cancer patients had both a positive tissue CEA reaction and a CEA/DNA ratio greater than 10 ng/micrograms, whilst patients with benign lesions had only 15% of positives by these criteria (0.01 greater than P greater than 0.001). The serum CEA concentration was above the upper normal level of 5 ng/ml in 2/39 patients, both of whom had gastric cancer. The CEA immunoreactive material from benign and malignant lesions eluted in gel filtration on Sephadex G-200 in the same volume as CEA purified from liver metastases of cancer of the colon, showing that a glycoprotein sharing immunological and physicochemical properties with CEA is present both in malignant and nonmalignant lesions of the gastric mucosa, and that there is considerable overlapping in the amount of CEA. The estimation of CEA in gastric-brush specimens is therefore of limited value in the differential diagnosis of benign and malignant gastric lesions.

Adult↗
PubMed1979

Carcinoembryonic antigen (CEA) in the gastric mucosa after partial gastrectomy.

Carcinoembryonic antigen (CEA) was studied by the three-layer bridge immunoperoxidase technique in gastric biopsy specimens taken from 49 patients, 13--20 years after partial gastrectomy. Routine histological examination revealed various degrees of chronic atrophic gastritis in all patients. A positive CEA reaction was found in 6 out of 9 with malignant or premalignant mucosal changes and in 4 out of 40 without these changes. In two cases of carcinoma the biopsies revealed a positive CEA reaction. In 4 patients with carcinoma diagnosed 1--2 years after the first examination the initial nonmalignant biopsies were CEA-positive in one case. All biopsies from mucosa with severe dysplasia and adenomatous polyps were CEA-positive. Four patients without malignant or premalignant changes in the gastric mucosa had CEA-positive biopsies. No carcinoma has been found in these patients at re-examinations after 1 year. The results indicate that the occurrence of immunohistochemically detectable CEA may be associated with malignant transformation of the gastric mucosa. The value of this method in screening patients at increased risk of gastric carcinoma will be further explored.

Adolescent↗
PubMed1978

Prenatal diagnosis of congenital nephrosis in 23 high-risk families.

The efficacy of maternal serum and amniotic fluid alpha-fetoprotein (AFP) estimation for the prenatal detection of congenital nephrosis was assessed in 23 pregnancies of couples with a previously affected child. At 15 to 18 weeks' gestation, amniotic fluid AFP concentration was elevated in seven of 23 cases, and maternal serum AFP level in five of these. Legal abortion was carried out at 18 to 19 weeks in all those cases where he amniotic fluid AFP concentration was abnormally high, and in all cases the fetus was found to be affected. The diagnosis of intrauterine congenital nephrosis was obvious by electron microscopic examination of the fetal kidney, but not by light microscopy. The child was born without congenital nephrosis in all 16 cases where amniotic fluid AFP level was normal, and in 16 of 18 cases (89%) where maternal serum AFP concentration was normal. Thus, the amniotic fluid AFP assay is more reliable and is recommended whenever congenital nephrosis is suspected on the basis of family history.

Abortion, Legal↗
PubMed1977

Divergent effects of 6-propylthiouracil on 3,3',5'-triiodothyronine (RT3) serum levels and in man.

The effect of 6-propylthiouracil (PTU) on the peripheral conversion of thyroxine (T4) to 3,5,3'-triiodothyronine (T3) and 3,3',5'-triiodothyronine (reverse T3 rT3) was investigated by assessments of the concentrations of T4 T3 and rT3 in peripheral venous blood from T4-treated healthy volunteers given PTU, 4 X 150 mg daily. Within on day of PTU administration, serum T3 concentrations were reduced, and those of rT3 enhanced. These deviations lasted as long as PTU was given (five days), and there was a rapid return towards normal within one day after PTU administration ceased. It seems probable that, in man, PTU can evoke a diversion of T4 monodeiodination, less being converted to the metabolically active T3 and more to the metabolically inactive rT3. It is ppossible that the rapidity whereby PTU can reduce T3 levels can offer an advantage in the treatment of hyperthyroidism.

Female↗