Sarcoidosis with multiple organ involvement associated with necrotizing crescentic glomerulonephritis.

We report a case of a young Saudi male who presented with generalized body weakness and easy fatigability associated with fever, night sweating, loss of weight and appetite, and renal impairment. He was diagnosed as a case of sarcoidosis, and renal biopsy report was consistent with necrotizing crescentic glomerulonephritis (GN). Immunosuppressive medication was started to help halting the progression to renal failure and stabilize renal function. To the best of our knowledge, the association between sarcoidosis and crescentic GN has been reported in only few cases in literature.

Recurrent syndrome of inappropriate antidiuretic hormone secretion due to tolterodine in an elderly male patient.

Hyponatremia is defined as serum sodium of <135 mmol/L and equates with a low serum osmolality once translocational hyponatremia and pseudohyponatremia are ruled out. True hyponatremia develops when normal urine-diluting mechanisms are disturbed. In elderly patients, this complication is not uncommon, especially in nursing homes and assisted living facilities. Medications are often the most common cause of hyponatremia in these patients. Herewith, we reported a 65-year-old Saudi male, a known case of benign prostatic hypertrophy and hypertension, who developed recurrent hyponatremia secondary to tolterodine. To our knowledge, this is the fifth case reported in literature of such association.