From: Bone metastases mimicking Complex Regional Pain Syndrome I: a case report
1. Type 1 is a syndrome that develops after an initiating event |
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2. Spontaneous pain or allodynia/hyperalgesia occurs, is not limited to the territory of a single peripheral nerve, and is disproportionate to the inciting event |
3. There is or has been evidence of edema, skin blood flow abnormality, or abnormal sudomotor activity in the region of the pain since the inciting event |
4. This diagnosis is excluded by the existence of conditions that would otherwise account for the degree of pain and dysfunction |