Primary Immune Thrombocytopenia

**Semantic type:** Disease or Syndrome

**Definition:** Acquired thrombocytopenia of unknown cause, characterized by immune-mediated destruction of normal platelets. It affects both children and adults. It manifests with petechiae, purpura, and overt bleeding. Based upon the duration of the disease, it is classified as newly diagnosed (from diagnosis until 3 months), persistent (3-12 months), and chronic (lasting for more than 12 months).

**Synonyms:** - ITP