M70-M79: Other soft tissue disorders

M73: Soft tissue disorders in diseases classified elsewhere

Soft tissue disorders in diseases classified elsewhere (M73) is a group of conditions affecting the soft tissues — mainly muscles, tendons, and ligaments — as part of or in association with other diseases. These conditions are not originated in the soft tissues themselves, but are due to an underlying illness situated in other parts of the body. Diseases that lead to soft tissue disorders can vary widely, including autoimmune diseases, infections, or metabolic disorders. Symptoms often depend on the specific soft tissue affected, but may include localized pain, swelling, and stiffness. These conditions can contribute to the progression of the underlying disease, affecting other body systems. In some cases, controlling the primary disease can help manage the soft tissue disorder, though this is not always the case.