Abstract
Kasabach-Merritt phenomenon (KMP) is consumptive coagulopathy in large vascular lesion. This condition is specific in kaposiform haemangioendothelioma (KHE) and tufted angioma, associated with high mortality rate. This condition often involves the limbs, trunk and retroperitoneum. The clinical features that are usually found are purpura, oedema, induration and ecchymosis. A boy baby aged 9 months presented with a history of violaceous tumour that appeared on his left leg at birth that became enlarged since 6 months ago that caused discrepancy between both of his legs. The patient has his left leg massaged through alternative treatment, causing it became bruised and wounded. Blood examination showed normocytic normochromic anaemia with severe thrombocytopenia and high D-dimer. The patient was diagnosed with KMP with cellulitis and treated with oral corticosteroid, propranolol and antibiotics. Diagnosis of KMP can be made through clinical and laboratory findings. Combination therapy with corticosteroid and propranolol can be considered for KMP treatment.