Pycnodysostosis with novel gene mutation and severe obstructive sleep apnoea: management of a complex case.
BMJ Case Rep 2013;
2013:bcr2013200590. [PMID:
24057333 PMCID:
PMC3794180 DOI:
10.1136/bcr-2013-200590]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Pycnodysostosis is a rare genetic disease. Impaired osteoclastic function is the basis for typical phenotypic features and bone fragility. The main differential diagnosis is osteopetrosis, also associated with altered bone remodelling, but with a more severe prognosis. We describe the case of an 8-year-old boy who presented life-threatening obstructive sleep apnoea successfully managed with non-invasive ventilation. Haematological overlap phenotype included anaemia and altered bone marrow, more common in osteopetrosis. Molecular analysis of the CTSK gene revealed a mutation not previously described in the literature.
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