Recurring renal lithiasis due to Dent's disease.

Dent's disease is a rare cause of hypercalciuria and recurring urolithiasis. Patients with this disease have elevated bone resorption due to the presence of parathormone (PTH) in the urine. We describe the case of a 21-year-old male with hypercalciuria, elevated bone resorption and recurring bilateral urolithiasis that achieves radiological and clinical stability with percutaneous nephrolithotomy (PNL) and medical treatment with hydrochlorothiazide, potassium-citrate and phytate.

Abdominal metastatic melanoma invading the transverse colon and stomach.

Gastrointestinal melanoma metastases are not uncommon, with the jejunum and ileum being the most common locations (58 %), followed by the stomach (26 %), colon (22 %), duodenum (12 %), and rectum (5 %).