內臟引起的疼痛 (轉移痛)

腹痛的原因很多，一些被轉移到背痛的疼痛容易被忽略。
膽結石的病患不少，痛的pattern很特別。跟胚胎發展有關。Referred pain is usually located in the cutaneous dermatomes sharing the same spinal cord level as the visceral inputs. As an example, nociceptive inputs from the gallbladder enter the spinal cord at T5 to T10. Thus, pain from an inflamed gallbladder may be perceived in the scapula (figure 1). Precise localization of the pain to the right upper quadrant in patients with acute cholecystitis usually occurs once the overlying parietal peritoneum (which is somatically innervated) becomes inflamed