Metformin induced acute pancreatitis and lactic acidosis in a patient on hemodialysis / 영남의대학술지

Metformin, commonly prescribed for type 2 diabetes, is considered safe with minimal side-effect. Acute pancreatitis is rare but potentially fatal adverse side-effect of metformin. We report a patient on hemodialysis with metformin-related acute pancreatitis and lactic acidosis. A 62-year-old woman with diabetic nephropathy and hypertension presented with nausea and vomiting for a few weeks, followed by epigastric pain. At home, the therapy of 500 mg/day metformin and 50 mg/day sitagliptin was continued, despite symptoms. Laboratory investigations showed metabolic acidosis with high levels of lactate, amylase at 520 U/L (range, 30-110 U/L), and lipase at 1,250 U/L (range, 23-300 U/L). Acute pancreatitis was confirmed by computed tomography. No recognized cause of acute pancreatitis was identified. Metformin was discontinued. Treatment with insulin and intravenous fluids resulted in normalized amylase, lipase, and lactate. When she was re-exposed to sitagliptin, no symptoms were reported.

Renal Artery Embolization in Patients with Polycystic Kidney Disease / 대한내과학회지

Polycystic kidney disease (PCKD) is the most common life-threatening genetic disease that causes kidney failure worldwide. Patients with autosomal dominant PCKD notice an increase in abdominal size as the kidney cysts grow and present with gastrointestinal and pulmonary symptoms. Surgical therapy, percutaneous drainage, sclerotherapy, cyst decompression, and laparoscopic fenestration have been used to treat the symptoms, but the results are often unsatisfactory. We recruited five patients with PCKD. Each patient complained of severe abdominal discomfort, and had a poor quality of life. In these patients, we performed renal artery embolization. After the procedure, all of the patients were discharged without severe complications. Follow-up abdominal computed tomography was performed 3-6 months after the procedure, and we were able to confirm a reduction in the size of both kidneys. In addition, the clinical symptoms improved in all five patients.

Rupture of a Superior Mesenteric Artery Pseudoaneurysm Presenting with Asymptomatic Anemia / 대한내과학회지

Anemia is a common cause of referrals to gastroenterologists. Only a small number of anemia cases result from vascular abnormalities. Visceral artery aneurysms and pseudoaneurysms are rare forms of vascular disease that have significant potential for rupture, resulting in potentially life-threatening hemorrhaging. We present the case of a 70-year-old female patient with a pseudoaneurysm of the superior mesenteric artery complicated with rupture, who had no abdominal pain and only anemia.