Congenital Myopathy 23, also known as nemaline myopathy 4, is related to distal arthrogryposis and cap myopathy, and has symptoms including waddling gait An important gene associated with Congenital Myopathy 23 is TPM2 (Tropomyosin 2). Affiliated tissues include skeletal muscle and prostate, and related phenotypes are neck muscle weakness and difficulty walking