Case#: Sibling 2, Patient F, female, 17 years old (age at report)
DiseaseAssertion: MPS1
FamilyInfo: Affected younger sibling (Sibling 1)
CasePresentingHPOs: HP:0000280, HP:0034337, HP:0001376, HP:0007957, HP:0000540, HP:0000483, HP:0000388, HP:0008513, HP:0000943, HP:0006536 (Coarse facial features, claw hand deformity, limitation of joint mobility, corneal clouding (unchanged since ERT), hyperopia (age 11), astigmatism (age 11), otitis media, mild bilateral conductive hearing (age 16), multiplex dysostosis, airway obstruction)
CaseHPOFreeText: Joint disease with limitation of range of motion of both proximal and distal joints, straight spine, cannot raise arms above head, median nerve compression, bilateral elongation of the Achilles tendon.
CaseNotHPOs: N/A
CaseNotHPOFreeText: Respiratory or sleep disturbances, no significant progression of previously reported moderate mitral insufficiency with thickened valve leaflets, anterior edge prolapse and mild left atrium thickening, no improvement of her moderately severe dysostosis multiplex with evidence of slight worsening of thoracic vertebral changes but stable cervical and hand findings, no white matter alterations
CaseEnzymeAssay: N/A
CaseUrineGAGs: At the age of 5 years, before ERT, were 18.2 μg/ml (nv: 5.27 μg/ml ± 3.01) with a CS/DS ratio of 25/75 (nv: 100/0); after 6, 9 and 10 year of ERT, plasma GAGs have remained within the normal range for age.
CaseERT: Yes
CaseBMT: N/A
Variant1: c.1205G>A (p.W402X)
Variant1ClinVarID: 11908
Variant1CAID: CA220498
Variant2: c.1603C>T (p.L535F)
Variant2ClinVarID: 638076
Variant2CAID: CA355965038
AdditionalVariants: N/A
ParentalGenotype: N/A
PreviouslyPublished N/A