笔者收治Ⅰ型肾小管酸中毒继发醛固酮增多症误诊为强直性脊柱炎1例,分析如下。1病历摘要男,20岁,因反复腰骶背部及四肢关节疼痛2 a入院。患者2 a前无明显诱因出现髋部、腰骶部疼痛,以夜间及晨起明显,伴晨僵约20 m in余,疼痛逐渐累及后胸背部,腰部活动受限。曾在当地医院诊断为 I admitted to type Ⅰ renal tubular acidosis secondary aldosteronism misdiagnosed as ankylosing spondylitis in 1 case, as follows. 1 medical record Summary Male, 20 years old, due to repeated lumbosacral back and limbs joint pain 2 a admission. There was no obvious predisposition for hip and lumbosacral pain in the patients before 2 months. The pain was obvious at night and morning, with a morning stiffness of about 20 mins. The pain gradually increased in the thoracolumbar and the lumbar muscles. It was diagnosed at a local hospital