ICD-11 definition : Hyaline body myopathy is a rare congenital myopathy that manifests with subsarcolemmal
hyalinized bodies in type 1 fibers. Ultrastructurally, hyalinized bodies in muscle
biopsy samples appear to consist of fine filamentous or granular material and not
to have a surrounding membrane. The neighbouring myofibrils were normal, with no sign
of degeneration. The clinical findings are diverse, with either scapulo-peroneal weakness
or limb girdle weakness. The age of onset in the patients reported varied from early
childhood to the fifth decade of life.;
ICD-11 synonym : Myopathy with lysis of type 1 myofibrils;
Hyaline body myopathy is a rare congenital myopathy that manifests with subsarcolemmal
hyalinized bodies in type 1 fibers. Ultrastructurally, hyalinized bodies in muscle
biopsy samples appear to consist of fine filamentous or granular material and not
to have a surrounding membrane. The neighbouring myofibrils were normal, with no sign
of degeneration. The clinical findings are diverse, with either scapulo-peroneal weakness
or limb girdle weakness. The age of onset in the patients reported varied from early
childhood to the fifth decade of life.