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Biomedical subjects

L Banach

Publications and source records attributed to L Banach.

At least 19 recordsLinked to original sources
PubMed1999

Carcinoma of the uterine cervix: results of Ka-Ngwane screening programme and comparison between the results obtained from urban and other unscreened rural communities.

OBJECTIVE: The Ka-Ngwane screening programme was initiated by the Department of Anatomical Pathology and the Department of Community Health at Medunsa to establish the incidence of cervical intraepithelial neoplasia (CIN) and cervical carcinoma (CaCx) in previously unscreened rural population in our catchment area. STUDY DESIGN: Ten thousand consecutive PAP smears from Ka-Ngwane (Mpumalanga) area are the subject of the analysis. The incidence of CIN I-CIN III and CaCx is calculated in the screened material. The changes are related to age, age of first pregnancy and parity of the patients. The incidence of cervical abnormalities is compared with 20,000 consecutive cases from Pretoria and 18,000 consecutive cases from previously unscreened rural population of Transkei. RESULTS: Positive cases consisted of three per cent in Ka-Ngwane, five per cent in Greater Pretoria area and of more than six per cent in Transkei. CaCx constituted 12.35% of all positive cases for Ka-Ngwane, 4.8% for urban population and 26% of Transkei positive cases. More than 75% of positive cases in Ka-Ngwane were below 40 years of age and five cases of CaCx were found in the 21-30 year age group. In Pretoria more than 80% of positive cases were younger than 41 years. In the material from Transkei similarly 80% of the positive cases were younger than 41 years. CONCLUSION: The screening programme confirmed the high incidence of CIN and CaCx in previously unscreened population and an urgent need to develop educational programme which will facilitate early detection, proper treatment and follow up of the cases with cervical pathology. CaCx was found at a younger age than in the developed countries which indicated that screening programmes in our environment should involve all adult females from the age of 25 years.

Adolescent↗
PubMed1993

Toxic hepatic injury is associated with proliferation of portal nerve fibers.

Hepatic innervation is thought to play an important role in the regulation of metabolism. Regenerating liver nodules in cirrhosis have a paucity of nerve fibers. The situation in chronic necroinflammatory and cholestatic liver diseases is unclear. We have therefore evaluated hepatic innervation in toxic hepatitis and non-specific reactive hepatitis. Liver biopsies from 42 patients considered to have chronic toxic liver injury, 25 patients with chronic reactive inflammatory infiltrates and variable degree of hepatic fibrosis and the control group comprising of 23 individuals who had undergone laparotomy for non-hepatic reasons (trauma etc.) and who had entirely normal hepatic histology were studied histologically and immunohistochemically for the presence of nerve fibres. Semiquantitative analysis showed significant proliferation of portal nerve fibers in biopsies confirmatory of toxic liver injury. Assessment of hepatic neural elements may be useful in the differential diagnosis of unspecified liver injury where toxic injury may be implicated.

Adolescent↗
PubMed1992

Oesophageal mucosa in a population at risk of oesophageal cancer: post-mortem studies.

We performed post-mortem studies of oesophageal mucosa from 513 consecutive autopsies of cases who died from unnatural causes or from diseases not related to the oesophagus. Of these, 170 cases were rural blacks from endemic high-risk areas, 98 were urban blacks at high risk, 158 were coloureds at moderate risk and 87 whites at low risk for oesophageal carcinoma. Oesophagi were studied macroscopically and histologically to determine malignant and precursor lesions. A prevalence of 1.0 to 1.8% of squamous carcinoma and 7 to 7.5% of mucosal dysplasia was detected in cases older than 30 years from high-risk urban and rural population groups. These results are in accord with our previous cytological and endoscopical screening studies. No significant differences in the prevalence of oesophagitis, glycogenic acanthosis and atrophy were found in the groups studied. A study of oesophageal melanocytes showed a 3% prevalence, unrelated to dysplastic and malignant lesions, and suggested that these cells were of little if any practical significance as precursor lesions.

Autopsy↗
PubMedDate not supplied

Hepatocellular carcinoma in a rural population at risk.

This study of hepatocellular carcinoma in a homogeneous rural Transkeian population at high risk consisted of: evaluation of liver biopsies of 246 patients with hepatocellular carcinoma using routine histology and immunoperoxidase for HBV stains; collection of reliable data on alcohol consumption, blood HBsAg and ALT status in asymptomatic controls from an adequate population sample; assessment of maize intended for human consumption for contamination by carcinogenic fungi. Tumour histology of rural Blacks did not differ from those described in other studies. Cirrhotic livers were present in 45.1% and iron overload in 68% of cases. Tissue HBsAg was detected in 57% (45% of non-cirrhotic and 59% of cirrhotic livers). Asymptomatic controls showed 9.5% of HBsAg positivity, 3.5% had elevated ALT and 41.3% admitted to alcohol abuse. Maize had insignificant contamination by Aspergillus flavus and very frequent contamination by Fusarium moniloforme. This study suggests a multifactorial aetiology of hepatocellular carcinoma, with viral infection being of the most importance.

Adolescent↗
PubMedDate not supplied

Hepatocellular carcinoma in young patients: histology, cellular differentiation, HBV infection and oncoprotein p53.

The study of 226 cases of hepatocellular carcinoma (HCC) in a homogenous rural Southern African population is based on the assessment of histology, HBV infection, p53 oncoprotein and transforming growth factor alpha (TGFa) expression. Epidemiological and morphological observations were compared to HCC observed in 89 cases from pathological files in Poland and published information from Japan and Italy. Comparatively high number of young patients with HCC in Africa presented high rates of HBV infection, p53 oncoprotein overexpression and high HBsAg/p53 correlation rates. In all patients histological grading of HCC was inversely related to p53 and TGFa expression. No significant differences in histological grading of HCC and patients' mean age were noted between various population groups. The association of hepatic cirrhosis was at least twice as common in non-African patients, whereas iron overload was noted almost exclusively in African patients livers. Signs of HBV infection were lowest in Japanese female patients. The mechanism by which early HBV infection contributes to hepatocarcinogenesis at an early stage of life is confirmed by epidemiological observations in Poland and by the clear association of p53 gene with HBsAg and the age of patients.

Adolescent↗