Tissue disorders refer to a range of medical conditions that affect the body's tissues, which are groups of cells that work together to perform specific functions. These disorders can impact various types of tissues, including muscle, nervous, connective, and epithelial tissues. Common examples include muscular dystrophy, which affects muscle tissue, and scleroderma, which involves the thickening of connective tissue. The causes of tissue disorders can vary widely, including genetic factors, autoimmune responses, and environmental influences. Symptoms may include pain, weakness, swelling, or changes in function, depending on the type of tissue affected. Diagnosis often involves imaging studies, biopsies, and laboratory tests to determine the underlying issue.