Complex Regional Pain Syndrome: The Daily PANCE Blueprint
A 35-year-old woman presents with severe pain in her right hand following a minor wrist fracture 3 months ago. She describes the pain as burning and throbbing, and it has progressively worsened despite the fracture healing. The pain is associated with swelling, increased sweating, and changes in skin color and temperature of the affected hand. On physical examination, the right hand is edematous, exhibits decreased range of motion, and is hypersensitive to touch. Which of the following is the most likely diagnosis?
A. Peripheral neuropathy
B. Reflex sympathetic dystrophy
C. Post-traumatic arthritis
D. Complex regional pain syndrome
E. Carpal tunnel syndrome
Answer and topic summary
The answer is D. Complex regional pain syndrome
Complex Regional Pain Syndrome (CRPS) is a chronic pain condition that usually affects one limb, often following an injury. It is characterized by prolonged or excessive pain and changes in skin color, temperature, and/or swelling in the affected area. CRPS is divided into two types: Type I (formerly known as Reflex Sympathetic Dystrophy) and Type II (formerly known as Causalgia), with Type I not associated with a confirmed nerve injury and Type II associated with a confirmed nerve injury. The diagnosis is based on clinical criteria and the exclusion of other conditions.
Incorrect Answers:
- A. Peripheral neuropathy: This condition involves damage to the peripheral nerves and typically presents with symptoms such as numbness, tingling, and weakness. It does not usually present with the autonomic symptoms and severe pain seen in CRPS.
- B. Reflex sympathetic dystrophy: This is an older term previously used to describe what is now known as CRPS type I. It shares similar features with CRPS, but the term is less commonly used in current clinical practice.
- C. Post-traumatic arthritis: This condition results from joint trauma and leads to joint pain, stiffness, and decreased range of motion. It does not explain the autonomic symptoms such as changes in skin color and temperature.
- E. Carpal tunnel syndrome: This condition is caused by compression of the median nerve at the wrist and typically presents with numbness, tingling, and weakness in the hand, especially the thumb, index, and middle fingers. It does not account for the autonomic symptoms and severe pain seen in CRPS.
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