The description "a group of inherited diseases that lead to chronic, progressive muscle atrophy" refers to muscular dystrophy.
Muscular dystrophy encompasses a range of genetic disorders characterized by progressive muscle weakness and degeneration. Conditions in this category include Duchenne muscular dystrophy, Becker muscular dystrophy, and others, all of which lead to muscle atrophy over time.
- Fibromyalgia: A condition characterized by widespread pain, fatigue, and tenderness, but it is not primarily associated with muscle atrophy.
- Myasthenia gravis: An autoimmune disorder that leads to muscle weakness, but it does not typically cause muscular atrophy as a primary symptom.
- Kyphosis: A spinal condition characterized by an abnormal curvature of the spine, which is not related to muscle atrophy.
Therefore, the correct answer is muscular dystrophy.