Mutations located in the distal end of the tail of slow/ß-cardiac MyHC corresponding to exons 37–40 of MYH7 have been associated with myosin storage myopathy (MSM), a protein aggregate myopathy associated with the characteristic subsarcolemmal accumulation of material consisting mainly of MyHC in muscle fibres [9, 10]. The gene discussed is MYH7; the disease is congenital myopathy 7A, myosin storage, autosomal dominant.