Search PubMed⌕ Search

Biomedical subjects

A J Veliath

Publications and source records attributed to A J Veliath.

At least 19 recordsLinked to original sources
PubMed1996

Fine-needle aspiration cytology in the diagnosis of superficial lymphadenopathy: an analysis of 2,418 cases.

During a period of 5 yr, 2,418 fine-needle aspirations (FNA) were performed on 2,216 patients with superficial lymphadenopathy. Chronic nonspecific lymphadenitis was the commonest inflammatory lesion followed by tuberculosis. Among malignant lesions, metastatic tumors were most common followed by non-Hodgkin's lymphoma. The FNAC findings were correlated with subsequent histopathological diagnosis in 1,041 cases. The sensitivity rates of FNAC in tuberculosis, metastatic tumors, Hodgkin's disease, and non-Hodgkin's lymphoma were found to be 83.3, 97, 30, and 80.3%, respectively, the specificity being 94.3, 98.9, 98.6, and 95.4% in the same order. Immunocytochemical tests performed on the aspirated material helped in classifying the metastatic poorly differentiated tumors and confirming the diagnosis of non-Hodgkin's lymphomas. Effects of FNA on subsequent biopsy in 81 lymph nodes with benign hyperplasia were studied and showed that aspiration does not interfere with subsequent histologic assessment. Thus FNAC is a simple, inexpensive procedure, and when complemented by appropriate immunocytochemical studies is accurate and reliable for routine diagnosis of lymphadenopathy.

Biopsy, Needle↗
PubMed1996

Alport's syndrome--a case report.

Alport's syndrome (hereditary nephritis with deafness), is an uncommon disease and is seen very infrequently in India. We report a fatal case in a young girl with characteristic ultrastructural changes in the kidney thus emphasising the exception noted in the observation that females have a better prognosis compared to males.

Adolescent↗
PubMed1995

Application of the AgNOR method to distinguish pseudoepitheliomatous hyperplasia from squamous cell carcinoma.

The AgNOR stain was performed on seventeen cases of pseudoepitheliomatous hyperplasia of the oral cavity and genital tract, seventeen cases of squamous cell carcinomas of the same regions, and nineteen cases of squamous cell carcinoma of the cervix, to determine whether the stain could help to distinguish pseudoepitheliomatous hyperplasia from squamous cell carcinoma. No constant relationship of the AgNOR score to the grade of the lesion could be determined. Follow up of some of the cases was possible. Here, too, it was seen that the AgNOR score could not reliably predict which cases of pseudoepitheliomatous hyperplasia would progress to squamous cell carcinoma, and which cases of squamous cell carcinoma would suffer a relapse.

Carcinoma, Squamous Cell↗
PubMed1993

Platelet function in acute leukemias.

Bleeding time, clot retraction, platelet factor 3 availability and platelet aggregation in response to ADP, epinephrine, collagen and ristocetin were studied in 13 cases of acute leukemia which included 5 cases of acute myeloid leukemia, 2 of chronic myeloid leukemia in blast crisis and 6 of acute lymphoblastic leukemia. More than one abnormality was seen in all the patients. Defects in bleeding time, clot retraction and platelet factor 3 availability were encountered in 43% of cases. Platelet aggregation responses to all the reagents were significantly impaired. There was, however, no consistency in the pattern of the defects.

Blast Crisis↗
PubMed1993

Accuracy of fine needle aspiration cytology of abdominal masses without radiological guidance.

This study was undertaken to evaluate the accuracy of FNAC of abdominal masses without the help of radiological guidance and to determine factors which affect the outcome of the procedure. Five hundred consecutive patients were studied. FNAC was reported by a single cytopathologist without knowledge of subsequent histology. In calculating indices of accuracy of FNAC only those patients in whom both FNAC and histology reports were available (N = 383) were considered. The overall incidence of unsatisfactory specimens was 5.6%. Consistency of the mass did not affect accuracy of FNAC. However, age (below 12 years) plane of the swelling, mobility of mass and size of the swelling, all significantly affected the adequacy of cytological yield. The overall true positive rate was 100.0% and there were no false positives. The true negative rate was 40.2% and false negative rate was 70.9%. The high false negative rates in hepatic and pancreatic lesions can be reduced by imaging techniques. Luminal organs had poor accuracy rates. The overall accuracy rate was 73.5%, comparable to that reported in literature. A positive diagnosis of malignancy had a 100% predictive value. Overall, it appears that nonguided FNAC is as accurate as guided FNAC except for very small lesions or discrete lesions such as hepatic secondaries where guidance may be useful.

Abdominal Neoplasms↗
PubMed1992

Primary disseminated fusarial infection.

Among the fungal pathogens the species Fusariam solani causing systemic infection is very rare and generally causes systemic infection only in an immuno-compromised host. We report a systemic infection caused by F. solani in a non-immunocompromised adult male, to our knowledge the first such case report.

Adult↗
PubMed1992

Percutaneous bone-marrow grafting of osteotomies and bony defects in rabbits.

The effects of percutaneous bone-marrow grafting done on the fifth day after osteotomies and induced defects of the shaft of the radius were studied in 41 adult rabbits. At 2 and 3 weeks, the callus volume was larger in the grafted radii than in the controls. Serial radiographs and gross and histologic findings confirmed that percutaneous bone-marrow grafting improved healing of osteotomies and defects at 4 weeks.

Animals↗
PubMed1992

Platelet function in chronic leukemias.

Bleeding time, clot retraction, platelet factor 3 availability and platelet aggregation in response to ADP, epinephrine, collagen and ristocetin were studied in 12 cases of chronic leukemia which included eight of chronic myeloid leukemia, two of chronic lymphatic leukemia and two of CLL related disorders. One or more abnormalities in platelet function were detected in all the cases. Among the cases of CML, bleeding time was prolonged in one, clot retraction was impaired in one and PF3 availability was decreased in one case. Defects in platelet aggregation were variable. Among the cases of CLL and CLL related disorders, bleeding time was prolonged in two, clot retraction was impaired in one and PF3 availability was decreased in three cases. Platelet aggregation responses were significantly impaired in all the cases.

Blood Platelets↗
PubMed1992

Rhinosporidiosis in Pondicherry.

One hundred and thirty-nine cases of rhinosporidiosis diagnosed histopathologically over a period of 4 years were analysed. Nasal rhinosporidiosis is common among males who bathe in stagnant ponds while ocular rhinosporidiosis is common among urban females. There is a seasonal variation in the incidence of nasal and ocular rhinosporidiosis.

Adolescent↗
PubMed1990

Problems and limitations with fine needle aspiration cytology of solitary thyroid nodules.

Fine needle aspiration cytology (FNAC) is a widely employed tool in the investigative work-up of patients with single thyroid nodules. Although its advantages are well documented, the limitations and problems in interpretation of FNAC in this condition are not well known. Experience with FNAC in 150 patients with solitary thyroid nodules is presented, highlighting the pitfalls of this technique. There was an inadequate specimen rate of 22.7% which declined with increasing experience. Follicular carcinomas could not be differentiated from follicular adenomas by cytology. Difficulties may arise in the detection of papillary carcinomas due to occult lesions, mixed papillary and follicular carcinomas or due to associated thyroid pathology. False positivity is, however, much rarer and is generally due to cellular adenomatous goitres with marked papillary activity. In view of these cytologic limitations, care must be exercised by the treating physician in interpreting cytological results.

Adenoma↗
PubMed1988

Antifertility effect in male rats of oleanolic acid, a triterpene from Eugenia jambolana flowers.

The antifertility activity of oleanolic acid (C30H48O3), isolated from the flowers of Eugenia jambolana, was evaluated in male albino rats. The administration of the compound for 60 days decreased the fertilizing capacity of the animals without any significant changes in body weight or reproductive organ weights. The compound produced arrest of spermatogenesis but did not cause any abnormality to spermatogenic cells, Leydig interstitial cells and Sertoli cells. Oleanolic acid may prove to be a promising antifertility agent devoid of undesirable side effects.

Animals↗
PubMed1988

Proton magnetic relaxation studies in normal and cancerous breast tissues.

Proton magnetic resonance (PMR) relaxation times were measured for dissected malignant and normal tissue derived from breast cancer patients. Relaxation time measurements (T1, T2) were carried out at a RF frequency of 20 MHz and at a temperature of 27 degrees C with a Brucker PC 120 NMR Process analyser. The tissue types were confirmed by histopathological examination. In general T1 values were found to be longer for malignant tissues as compared to normal tissues which is in agreement with the earlier observations. The measured T2 values do not exhibit the malignant tissues above. The percentage of water content was also measured in both normal and malignant tissue and was found to be considerably larger in tumour tissue as compared to normal tissue. These results are discussed on the basis of two fraction fast exchange models of water molecules and confirm that PMR relaxation time measurement plays an important role in the differentiation of cancerous tissues from that of normal.

Breast↗