Which disease has typical onset between 21 and 40 years?

Which disease has typical onset between 21 and 40 years?

• A. Multiple sclerosis
• B. Spinal stenosis
• C. Rheumatoid arthritis
• D. Paget's disease

Answer: (A)

Multiple sclerosis is most consistently seen starting in young adults, with onset commonly in the 20s to 40s. This age pattern is a hallmark of MS and helps distinguish it from other conditions that typically present later or with different features. MS is a central nervous system demyelinating disease characterized by episodes of neurologic symptoms such as visual disturbances, numbness, weakness, or gait changes, often first noticed within that 21–40 year range. Spinal stenosis usually emerges in older adults due to degenerative changes and osteoarthritis, often after age 50 or 60. Paget’s disease of bone tends to present later in life as well, typically after 55, with bone pain or deformities. Rheumatoid arthritis can begin in adulthood, often in the 30s to 50s, but its onset is more variable and less tightly tied to the 21–40 window than MS.

Multiple sclerosis is most consistently seen starting in young adults, with onset commonly in the 20s to 40s. This age pattern is a hallmark of MS and helps distinguish it from other conditions that typically present later or with different features. MS is a central nervous system demyelinating disease characterized by episodes of neurologic symptoms such as visual disturbances, numbness, weakness, or gait changes, often first noticed within that 21–40 year range.

Spinal stenosis usually emerges in older adults due to degenerative changes and osteoarthritis, often after age 50 or 60. Paget’s disease of bone tends to present later in life as well, typically after 55, with bone pain or deformities. Rheumatoid arthritis can begin in adulthood, often in the 30s to 50s, but its onset is more variable and less tightly tied to the 21–40 window than MS.