ABSTRACT
The Ewing's sarcoma family can present diagnostic difficulties. In the past the basis of diagnosis has been a exclusion. Identification of a specific translocation especially t(11;22) (EWS-FLI 1 fusion gene), which is seen in nearly 85 percent of Ewing's sarcoma cases can help in precise diagnosis. We have carried out a study on twenty patient samples diagnosed to have Ewing's sarcoma/peripheral neuroectodermal tumour (PNET)/small round cell malignant tumour. The study involved RT-PCR analysis for the fusion transcript, followed by sequencing to identify the specific type of fusion. Ninety percent (18/20) of the samples tested were found to be t(11;22) translocations involving EWS-FLI 1 genes. Sixty-one percent (11/18) were found to be type 1 fusion and seven were type 2 (39 percentage). This is the first study in India with quantitative information about the types of EWS-FLI 1 translocations present in Ewing's family of tumours in south Indian patients.
Subject(s)
Adolescent , Adult , Child , Chromosomes, Human, Pair 11 , Chromosomes, Human, Pair 22 , Female , Humans , India , Male , Middle Aged , Neuroectodermal Tumors, Primitive, Peripheral/classification , Oncogene Proteins, Fusion/genetics , Sarcoma, Ewing/classification , Transcription Factors/genetics , Translocation, GeneticABSTRACT
Atualmente, os cistos intraventriculares nao neoplasicos e nao inflamatorios sao divididos em dois grupos distintos: cistos neuroepiteliais (neurogliais) e cistos coloides. Os cistos neuroepiteliais e coloides eram considerados originarios do neuroepitelio primitivo, porem, estudos imuno-histoquimicos recentes sugerem uma origem endodermica para os cistos coloides...