A rare presentation of Matrix Stone and a short review of the literature

Abstract

Matrix stones are extremely rare. An unusual case of coexistence of matrix stone with a conventional, calcified stone is reported. A 63-year-old female was admitted to our department because of a sizable, radiopaque, right renal stone. Her medical history included recurrent urinary tract infections. Preoperative Computed Tomography scan demonstrated a 2 cm calculus and a radiolucent, soft tissue mass in the dilated, right renal pelvis, without enhancement after the intravenous administration of contrast agent. The patient underwent right Percutaneous Nephrolithotomy. Intraoperatively, we found that the renal pelvis was occupied by matrix stone with a centrally located core of solid calculus.