Caused by mutation in the fibroblast growth factor receptor-1 gene (FGFR1, 136350.0001) [MOLECULAR BASIS] Type 3: craniosynostosis, early demise, sporadic [MISCELLANEOUS] Caused by mutation in the fibroblast growth factor receptor-2 gene (FGFR2, 176943.0012) [MOLECULAR BASIS] Type 2: cloverleaf skull, elbow ankylosis, early demise, sporadic [MISCELLANEOUS] Three subtypes of Pfeiffer syndrome have been described - Type 1: 'mild' autosomal dominant [MISCELLANEOUS] De novo mutation in most cases [MISCELLANEOUS]
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