Multidisciplinary management of X-linked myotubular myopathy in Spain and Portugal: A case series analysis

X-linked myotubular myopathy (XLMTM) is a severe, rare, familial neuromuscular disease caused by mutations in the MTM1 gene. XLMTM presents a wide spectrum of clinical manifestations, including neuromuscular symptoms such as hypotonia and severe generalised muscle weakness, which lead to respiratory and orthopaedic complications; and extramuscular manifestations such as hepatobiliary and gastrointestinal involvement. As there is no curative treatment for XLMTM, and given the complications associated with the disease and its high morbidity and mortality, survival and quality of life in these patients rely on a comprehensive, multidisciplinary approach.

A group of paediatric neurologists, one pulmonologist, one hepatologist, one intensivist, and rehabilitation specialists from Spain and Portugal with in-depth understanding and experience in XLMTM management present a multicentre series of 24 patients with XLMTM and problems and experience on its clinical management.

Severe phenotypes showed significant neuromuscular and non-neuromuscular involvement. Multidisciplinary management, including respiratory support, nutritional interventions, and rehabilitation, is essential. Unmet needs include better neurocognitive assessment tools, improved access to multidisciplinary care, and resources for physical therapy. Communication aids are crucial for patient development.

Multidisciplinary management of XLMTM is essential for improving outcomes, with significant unmet needs in several areas of clinical care.