Distinct craniofacial-skeletal-dermatological dysplasia in a patient with W290C mutation in FGFR2.
Mutations in the fibroblast growth factor receptor genes (FGFR) have been known to be associated with many craniosynostosis syndromes with overlapping phenotypes. We studied a 15-year-old Thai boy with an unspecified craniosynostosis syndrome characterized by multiple suture craniosynostoses, a persistent anterior fontanel, corneal scleralization, choanal stenosis, atresia of the auditory meatus, broad thumbs and great toes, severe scoliosis, acanthosis nigricans, hydrocephalus, and mental retardation. Radiography revealed bony ankyloses of vertebral bodies of T9-12, humero-radio-ulnar joints, intercarpal joints, distal interphalangeal joints of fifth fingers, fibulo-tibial joints, intertarsal joints, and distal interphalangeal joints of the first toes. The patient was a heterozygous for a 870G --> T change resulting in a W290C amino acid substitution in the extracellular domain of the fibroblast growth factor receptor 2 gene (FGFR2). This mutation has previously been reported in a patient with severe Pfeiffer syndrome type 2 that is distinct from the craniosynostosis in our patient. These findings emphasize locus, allelic, and phenotypic heterogeneity of craniofacial-skeletal-dermatological syndrome due to FGFR2 mutations.
Shotelersuk
Vorasuk
V
Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Ittiwut
Chupong
C
Srivuthana
Sumarlee
S
Mahatumarat
Charan
C
Lerdlum
Sukalaya
S
Wacharasindhu
Suthipong
S
D000015:Abnormalities, Multiple / Q000000981:diagnostic imaging / Q000235:genetics*; D000293:Adolescent; D019943:Amino Acid Substitution; D019465:Craniofacial Abnormalities / Q000000981:diagnostic imaging / Q000235:genetics*; D006801:Humans; D008297:Male; D011859:Radiography; D020794:Receptor Protein-Tyrosine Kinases / Q000235:genetics*; D051497:Receptor, Fibroblast Growth Factor, Type 2; D017468:Receptors, Fibroblast Growth Factor / Q000235:genetics*; D012867:Skin / Q000473:pathology*; D013785:Thailand
D017468:Receptors, Fibroblast Growth Factor; C496353:FGFR2 protein, human; D020794:Receptor Protein-Tyrosine Kinases; D051497:Receptor, Fibroblast Growth Factor, Type 2