Kasabach–Merritt syndrome (KMS) consists of large and rapidly growing vascular tumors associated with thrombocytopenia, generalized petechiae, and bleeding. The cause of the thrombocytopenia is thought to be related to the trapping of platelets by the abnormal endothelium of the tumor. We report an infant with KMS that developed in association with a large tufted angioma. In this case we directly demonstrated platelet trapping in the vascular lumen of the tumor by an immunohistochemical technique using a monoclonal antibody against CD61, a marker of platelets and megakaryocytes.

We report a case of lichenoid sarcoidosis in a 3-year-old girl. She had numerous discrete skin-colored or erythematous, infiltrated follicular papules on the buttocks and extremities since 2 months of age. Histopathologic examination showed follicular plugging and an upper dermal granulomatous infiltrate of epithelioid cells closely surrounding the follicular ducts. No acid-fast bacilli were seen in the sections examined. Chest radiograph and high-resolution computed tomography (CT) showed no hilar lymphadenopathy or pulmonary parenchymal changes. An angiotensin-converting enzyme level was elevated. The Mantoux reaction was negative and results of ophthalmologic examinations were normal. Treatment was started with triamcinolone 0.2 mg/kg and prednicarbate ointment. Some lesions healed completely and others showed residual pitting.

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