Flow Cytometry in Pediatric Malignancies

The utility of flow cytometry as a useful diagnostic modality for the assessment of hematopoietic neoplasms has been established beyonddoubt. In fact, it is now an integral part of the diagnosis and classification of various diseases like leukemias and lymphomas along withmolecular studies and cytogenetics. Prognostication and disease monitoring by flow cytometry is also being recognized increasingly asone of the important fortes. This is evident by the number of articles in the published in literature on the minimal residual disease detectionby flow cytometry especially in the last decade or so. To add to this, ever growing list of utilities in hematopoietic malignancies, many non-hematopoietic neoplasms can also be analyzed by flow cytometry. The examples include fluid specimens from serous cavity effusionsand samples from solid tissues like lymph nodes, reticulo-endothelial tissue, central nervous system tissue, etc. Flow cytometry techniqueprovides a unique blend of rapidity, high sensitivity and specificity compared to cyto-morphology and conventional immunohistochemicalstaining. It is also remarkable for simultaneous analysis of more than one marker on the cells. Evaluation of limited samples such ascerebrospinal fluid or fine needle aspiration samples makes Flow cytometry a valuable tool. DNA ploidy analysis and assessment ofpediatric non-hematopoietic neoplasms by Flow cytometry has envisaged the utility vista of this technique. This review is aimed atproviding an insight into the applications of flow cytometry in pediatric malignancies.

Epithelioid hemangioma of the temporal artery: a case report.

Temporal or giant cell arteritis is the most common vasculitis affecting the temporal artery. We encountered an unusual case of involvement of the temporal artery, which showed marked proliferating capillaries admixed with a dense infiltrate of eosinophils affecting all layers of the vessel. It was concluded that these changes were those of an epithelioid hemangioma of the temporal artery.

Urethral obstruction due to lobular mesonephric hyperplasia of the vagina--a case report.

The histological finding of persistent mesonephric duct remnants in the uterine cervix and vagina is uncommon and is usually an incidental finding in tissues excised for other reasons. Herein we present a case of lobular mesonephric hyperplasia in a 45 year old woman who presented with vaginal bleeding and difficulty passing urine.

Sarcomatoid renal cell carcinoma with osteosarcomatous differentiation--a case report.

A rare case of sarcomatoid renal cell carcinoma (RCC) with predominantly osteosarcomatous differentiation occurring in a 36-year-old male is reported. Immunohistochemistry excluded the possibility of primary osteosarcoma of the kidney.