Acquired vascular purpura

**Definition:** Purpura resulting from vascular factors rather than from abnormalities in the blood such as dysproteinaemias and disorders of platelets and coagulation.

**Exclusions:** - Antineutrophil cytoplasmic antibody-associated vasculitis - Antiphospholipid syndrome - Capillaritis - Drug-associated immune complex vasculitis - IgA vasculitis - Leukocytoclastic vasculitis - Purpura or bruising due to vascular fragility - Thrombotic thrombocytopenic purpura - Traumatic purpura