Changes

Haemorrhagic diseases can be categorised by two different causal mechanisms:

Haemorrhagic diseases can be categorised by two different causal mechanisms:

*Increased vessel fragility which leads to a non-thrombocytopenic [[Haemorrhage_-_Pathology#Purpura|purpura]].

*Increased vessel fragility which leads to a non-thrombocytopenic [[Haemorrhage_-_Pathology#Purpura|purpura]].

*Inadequate haemostatic response. This may be caused by platelet dysfunction or deficiency, which leads to a primary or secondary thrombocytopenic purpura, or deficiencies/derangements of clotting factors.

*Inadequate haemostatic response. This may be caused by platelet dysfunction or deficiency, which leads to a primary or secondary thrombocytopenic purpura, or [[Coagulation Factor Deficiency|deficiencies/derangements of clotting factors]].

Syndromes caused by vascular fragility and platelet dysfunction tend to be purpuric and acquired.

Syndromes caused by vascular fragility and platelet dysfunction tend to be purpuric and acquired.