Based on Neer's classification for shoulder impingement, which stage is characterized by fibrosis and tendinitis and typically presents in patients aged 25-40?

• A. Stage 1
• B. Stage 2
• C. Stage 3
• D. Stage 4

Answer: (B)

In Neer’s classification, the stages reflect how shoulder impingement evolves with duration and tissue changes. The second stage represents chronic irritation where the tendons become thick and fibrotic, and tendinopathy develops from ongoing impingement under the acromion. This pattern and the typical age range of about 25–40 years align the description with Stage II. Early stage involves edema and hemorrhage in younger patients, while later stages include rotator cuff tears and degenerative changes that appear after longer-standing impingement. So the fibrotic changes with tendinitis in a 25–40-year-old patient fit Stage II.