Malignant infantile osteopetrosis (MIOP), a rare congenital disorder of bone resorption, is caused by the failure of osteoclasts to reabsorb immature bones. We report a 3-month-old female child with cleft lip who was referred to the pediatric department for consultation. She was born to consanguineous parents, and the elder sibling expired at the age of 3 years owing to recurrent respiratory tract infections and hydrocephalus. On examination, we found pallor and hepatosplenomegaly. On follow-up, we came to know that she exhibited delayed developmental history and bilateral optic atrophy. Skeletal radiographs showed dense bones with bone-in-bone appearance. The overall clinical features and radiological findings of these patients were sufficient to arrive at the diagnosis of MIOP.
Key words: Osteopetrosis, optic atrophy, pallor, radiological findings
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