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medicaldictionary.peperonity.net

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-[HISTOCOMPATIBILITY ANTIGENS]-
Genetically determined iso-antigens present on the memberanes of nucleated cells. They incite an immune response when grafted on to genetically disparate individuals, and thus determine the compatibility of cells in transplantation.


-[HOWELL-JOLLY BODIES]-

DNA remnants in peripheral RBCs seen postsplenectomy, in leukaemia and megalo-blastic anaemia.


-[HLA]-
:HUMAN LEUCOCYTE ANTIGENS:
Human histocompatibility antigens determined by a region on chromosome 6. There are several genetic loci, each having multiple alleles, designated HLA-A, HLA-B, HLA-C, HLA-DP,-DQ and –DR. The susceptibility to some diseases is associated with certain HLA alleles (e.g.HLA-B27 in 95% of patients with ankylosing spondylitis), although their exact role in aetiology is unclear.


-[HYPERPLASIA]-

The abnormal multiplication or increase in the number of normal cells in normal arrangement in a tissue.


-[HYPERTROPHY]-

The enlargement or overgrowth of an organ or part due to an increase in size of its constituent cells.


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