21. Which of the following statements about peripheral neuropathic pain (PNP) is FALSE?
(A) The most commonly described spontaneous symptoms of PNP are deep aching in the
extremities and a superficial burning, stinging, or prickling pain.
(B) The incidence of ongoing pain at rest is high in patients with PNP.
(C) The incidence of joint hyperalgesia is high (around 50%) in patients with PNP.
(D) The incidence of edema is low in patients with PNP.
(E) The incidence of sympathetically maintained pain is low in patients with PNP.