Muscle pain may be part of many neuromuscular disorders including myopathies, peripheral neuropathies and lower motor neuron diseases. Although it has been reported also in mitochondrial diseases (MD), no extensive studies in this group of diseases have been performed so far. We reviewed clinical data from 1398 patients affected with mitochondrial diseases listed in the database of the “Nation-wide Italian Collaborative Network of Mitochondrial Diseases”, to assess muscle pain and its features. Muscle pain was present in 164 patients (11.7%). Muscle pain was more commonly detected in patients with mitochondrial DNA mutations (67.8%) than with nuclear DNA changes (32.2%). Interestingly, patients with nuclear DNA mutations tend to have a better therapeutic response than patients with mtDNA mutations. The full article you can find here.