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Case Reports
. 2003;7(6):401-6.
doi: 10.1016/s1090-3798(03)00109-0.

Skeletal muscle involvement in infantile systemic hyalinosis

Zarazuela Zolkipli  1 , Cheryl Longman, Sue Brown, Nazneen Rahman, S E Holder, Francesco Muntoni
Affiliations
Case Reports

Skeletal muscle involvement in infantile systemic hyalinosis

Zarazuela Zolkipli et al. Eur J Paediatr Neurol. 2003.

Abstract

Infantile Systemic Hyalinosis is a rare autosomal recessive entity, characterised by deposition of hyaline material in skin and bone, often complicated by visceral involvement. The characteristic features are marked delay in motor milestones attributed to severe progressive flexion contractures of proximal and distal joints, and skin and mucosal hypertrophy and thickening, followed by failure to thrive. Pain secondary to osteolytic lesions is also a predominant feature. We report a patient with Infantile Systemic Hyalinosis, confirmed by the clinical findings, who also displayed clear evidence of proximal muscle weakness. Muscle biopsy revealed myopathic changes, which have not been reported previously. We suggest that skeletal muscle is involved in Infantile Systemic Hyalinosis and contributes to the characteristic poor outcome of these patients.

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