Which term refers to an illness that is incurable and ultimately leads to death?

The term that describes an illness that is incurable and ultimately leads to death is "terminal illness." Terminal illnesses are characterized by their progression towards a stage where recovery is not possible, and they typically have a limited life expectancy. This distinction is crucial in various fields, including healthcare and music therapy, as it impacts treatment decisions, end-of-life planning, and the approach to care, including the emotional and psychological support provided to patients and their families.

Chronic illness refers to long-term health conditions that may be managed but not necessarily cured, which is distinct from being terminal. Neuromuscular diseases are a specific category of medical conditions affecting the nerves and muscles, which may or may not be terminal. Palliative conditions, while they may involve providing comfort for terminal illnesses, do not specifically denote an illness that is incurable and leads to death but rather the approach to care that focuses on alleviating symptoms and improving quality of life. Thus, "terminal illness" is the most accurate term in this context.