Marked Metabolic Acidosis Due to a Transverse Stoma after Urethroplasty for Congenital Epispadias.

A 58-year-old woman was admitted to our hospital. At 10 years old, she had undergone bilateral uretero-sigmoid anastomosis for congenital epispadias, and at 57 years old, she had received transverse colostomy. Biochemical tests showed marked metabolic acidosis. Computed tomography showed urine stagnation in the sigmoid colon, leading to a diagnosis of metabolic acidosis associated with transverse stoma after bilateral uretero-sigmoid anastomosis. Her bone mineral density was below normal, and the bone metabolic marker levels were high, indicating high-turnover osteoporosis. Both metabolic acidosis and bone metabolism were stabilized by treatment with a transanal urinary catheter, sodium bicarbonate, and vitamin D.