X-linked myotubular myopathy (MONDO_0010683) is a rare X-linked congenital myopathy characterized by numerous centrally placed nuclei on muscle biopsy and that presents at birth with marked weakness, hypotonia and respiratory failure. Also known as: MTM, X-linked centronuclear myopathy, XLCNM, XLMTM, centronuclear myopathy, X-linked, myotubular myopathy, X-linked, X-linked recessive.