The main causal mutations are distributed throughout the genes encoding myotubularin (MTM1) for XLMTM (OMIM: 310400) [24], dynamin 2 (DNM2) [25] and amphiphysin 2 (BIN1) [26] for the autosomal dominant form (OMIM: 160150), and amphiphysin 2 (BIN1) [27] for the autosomal recessive form (OMIM: 255200). The gene discussed is DNM2; the disease is X-linked myotubular myopathy.