MYL4 and cardiomyopathy: MYL4 has been shown to be associated with 27 diseases in the MYL4 Network, including atrial fibrillation, malignant neoplasm of breast (breast cancer), neoplasm metastasis, squamous cell carcinoma of esophagus, solid neoplasm, breast carcinoma, cardiomyopathies, and tumor cell Invasion, among others.