hereditary inclusion-body myopathy hereditary inclusion body myopathy type 4 https://www.malacards.org/card/hereditary_inclusion_body_myopathy_type_4 MEDGEN:1669421 UMLS:C4749501 MONDO:0017931 HIBM4 Hereditary inclusion body myopathy type 4 is a rare non-dystrophic myopathy characterized by slowly progressive muscular weakness and atrophy initially involving proximal lower limbs and hip girdle and later on shoulder girdle, proximal upper limbs and axial muscles. Ambulation is usually preserved. Congophilic inclusions with cytoplasmic inclusions of 15-21 nm filaments on electron microscopy are revealed in muscle biopsy. GARD:0021440 Orphanet:324381