Which symptom or presentation is NOT observed in Complex Regional Pain Syndrome Type 1?

• A. Osteopenia of the shoulder
• B. Edema
• C. Color changes
• D. Hyperhidrosis

Answer: (A)

CRPS Type I involves autonomic dysfunction that causes changes you can actually observe in the affected limb: swelling from edema, visible color changes due to vasomotor instability, and abnormal sweating (hyperhidrosis or altered sudomotor function). These signs reflect the ongoing sympathetic and inflammatory processes in the limb.

Osteopenia, while it can appear on radiographs in chronic CRPS because of disuse and bone resorption, is not a typical early presentation. It is more a late or radiographic finding and is not something you would commonly expect to see as a presenting symptom in the shoulder region. Therefore, osteopenia of the shoulder is not observed as part of the usual clinical presentation of CRPS Type I, making it the correct choice for the item that is not observed. The other options—edema, color changes, and hyperhidrosis—are classic, observable features of CRPS Type I.