| A rare genetic lethal primary bone dysplasia with characteristics of dysmorphic craniofacial features (low-set, posteriorly rotated ears, hypertelorism, megalophthalmos, flattened and hypoplastic midface, micrognathia), hypomineralization of the calvarium, craniosynostosis, hypoplastic clavicles and pubis and bent long bones (particularly involving the femora). Caused by germline mutations in the FGFR2 gene. Prematurely erupted fetal teeth, osteopenia, hirsutism, clitoromegaly, gingival hyperplasia, and hepatosplenomegaly with extramedullary hematopoesis may also be associated. |
