الفهرس 
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Abstract
Purpuras are a group of diseases, in which Eaflall haemorrbages occur into the superfjcj8j layers of the skin produciug areas of purple discolouration (Nelson, 1979). Purpuric syndromes can be classified into three main groups, thrombocy-topenja, platelet dysfunction and vascular defects,
Tkrombocytopenjc purpura may accompany a great variety of disorders, and can develop in a diverse number of WByS. The tern ITP is intended to distinguish cases of unknown aetiology from symptomatic forms.
Idiopathic thrombocytopenic purpura (flP) —at one time— was Considered to be a single entity, and various nanea were applied such as Werlhof’a disease, bemogenic syndrome (RoskEuu, 1923), end essential, primary or idiopathic thrombocytopepjc purpura (Schultz, 1919), The condition is characterized by petecbiae and ecobymoses in the skin as well as baemorr.hages from the mucous membranes, Platelet count is reduced, bleeding time is prolonged and the coagulation time is essentially normal.
The flontbrombocytopeydc purpura, refers to a group of conditions which are rapidly increasing in number.
They have —in common— a def’ective platelet function, which is in turn related to either factor within the platelets or within plasma environment, Examples inelude, Glanaaann throbocytopenja, which is trananitted as autosomal recessive trait, Von—Wiflbrand disease which is characterized by varying degree of factor VIII deficiency, Wiskot—Aldrich syndrome, and other acquired disorders which may result from uraemia, chronic liver diseases and drug induced platelet dysfunction. Degeer et al. (1979), reported that purpura could be of para— sitic origin. Vascular damage either hypoxic or inflaininatory could lead to purpuric manifestations of these syndromes Henoch Shonlein disease deserves special reference.
The aini of this work is to through light—as possible- on the different and divergent causes of pur— pura with special reference to those which are most pre— velaut in our country.
The complete discreption of the whole aetiologic factors —which are multiplying every day— belong to the realm of impossible, Then to discuss the different lines of investigations, that could be done in each case. Pinally to evaluate how our patient could be approached via the different lines of management.