Congenital myopathy caused by pathogenic mutations in MYPN that lead to a wide spectrum of phenotypes. Patients with mutations in this gene often experience muscle weakness, facial weakness, and sometimes cardiac and respiratory issues. Histological findings on skeletal muscle biopsy are variable with nemaline bodies and cap-like lesions. [ https://clinicalgenome.org/affiliation/40031/ http://www.ncbi.nlm.nih.gov/pubmed/28017374 ]