MSA Muscle Tumor Diagnostic Test - Muscle Specific Actin (MSA) Test

The muscle-specific actin immunohistochemistry (MSA) assay aims to detect actin isoforms found in striated, smooth, and cardiac muscle cells. It uses cocktails of antibodies (such as HHF35) that recognize these muscle actins. MSA is a highly sensitive marker of myogenesis, making it a useful tool for identifying tumors arising from muscle cells in various tissues.