The Mesomark assay is a test used to detect mesothelioma, a type of cancer that affects the lining of the lungs, heart, and abdomen. Although the Mesomark assay is a commonly used term, there are various synonyms that can be used to refer to this test. Some of these include mesothelin assay, MSLN assay, and soluble Mesothelin-related peptide (SMRP) assay. These terms are often used interchangeably with the Mesomark assay and refer to the same diagnostic test. Ultimately, the use of these synonyms provides a better understanding of the type of test being conducted and allows for improved communication between healthcare providers and patients.