VWA1 and neuromuscular disease: However, although TSP1 has been highlighted to serve a blood biomarker in a diversity of disorders such as peripheral arterial disease35 and precapillary pulmonary hypertension,36 to the best of our knowledge, thus far circulating TSP1 has not been described a blood biomarker (candidate) in neuromuscular diseases with VWA1‐related neuromyopathy being the first one.