Hypokalemic paralysis as primary presentation of Fanconi syndrome associated with Sjögren syndrome.
Hypokalemic paralysis is a rare presentation of Fanconi syndrome (FS) caused by Sjögren Syndrome (SS). We describe a 39-year-old man who manifested flaccid paralysis of 4 limbs. Laboratory investigations showed profound hypokalemia (1.6 mmol/L) with renal K wasting, hyperchloremic metabolic acidosis with positive urine anion gap, hypophosphatemia with hyperphosphaturia, hypouricemia with hyperuricosuria, normoglycemic glycosuria, and abnormal serum creatinine concentration 2.2 mg/dL. A thorough survey for the cause of FS revealed that he had xerophthalmia and xerostomia accompanied by high anti-Ro antibody, positive Schirmer test, and delayed saliva excretion on sialoscintigraphy, confirming the diagnosis of SS. Potassium citrate, active vitamin D3, and high phosphate diet for his FS coupled with mycophenolate mofetil for SS resolved clinical symptoms and ameliorated renal function. Early recognition of HP due to the underlying SS-related FS with prompt therapy not only could terminate potentially life-threatening hypokalemia, but also improve renal outcome.
Wang
Chih-Chiang
CC
Division of Nephrology, Department of Internal Medicine, Kaohsiung Armed Forces, General Hospital, Kaohsiung, Taiwan, Republic of China.
Shiang
Jeng-Chuan
JC
Huang
Wen-Te
WT
Lin
Shih-Hua
SH
D000328:Adult; D018501:Antirheumatic Agents / Q000627:therapeutic use; D005198:Fanconi Syndrome / Q000150:complications* / Q000175:diagnosis*; D006801:Humans; D007008:Hypokalemia / Q000209:etiology*; D008297:Male; D009123:Muscle Hypotonia; D009173:Mycophenolic Acid / Q000031:analogs & derivatives / Q000627:therapeutic use; D010243:Paralysis / Q000209:etiology*; D012859:Sjogren's Syndrome / Q000150:complications* / Q000175:diagnosis* / Q000188:drug therapy
D018501:Antirheumatic Agents; D009173:Mycophenolic Acid