患者年龄多在40岁以上,男多于女。病程长,数年或数十年不等。初期为相对无症状期与发作期交替出现;晚期主要为胰腺功能不全之表现。一、腹痛。常见,占90%左右,多呈间歇性发作,少数呈持续性,疼痛多位于上腹部,可向背部、双侧季肋部、前胸、肩胛等处放散,饭后或饱餐后可诱发,仰卧位时加重,前倾、坐位减轻。发作时可伴有发热或黄疸。间歇期可无症状,或仅有消化不良表现。少数患者以隐 Patients are more than 40 years of age, more men than women. Long course, a few years or decades. The initial period of relative asymptomatic alternating with the attack; late mainly for the performance of pancreatic insufficiency. First, abdominal pain. Common, accounting for about 90%, mostly intermittent seizures, a few were persistent, the pain is located in the upper abdomen, to the back, both quarter ribs, chest, scapula, etc. Department discharge, after meals or after meals can be induced, Increased supine position, forward, seat to reduce. Attack may be accompanied by fever or jaundice. Intermittent asymptomatic, or only dyspeptic performance. A small number of patients to implicit