Thrombocytopenic disorders are medical conditions characterized by a low platelet count in the blood, which can lead to increased bleeding and bruising. Platelets, or thrombocytes, are essential for blood clotting, and a deficiency can result from various causes, including bone marrow disorders, autoimmune diseases, or certain medications. Common types of thrombocytopenic disorders include immune thrombocytopenic purpura (ITP), where the immune system mistakenly attacks platelets, and thrombotic thrombocytopenic purpura (TTP), a rare condition that causes small blood clots to form throughout the body. Diagnosis typically involves blood tests and a thorough medical history.