Bilateral renal sand-like stones

Bilateral renal sand-like stones are a common type of kidney stone composed of small granules, resembling sand in appearance, also known as "fine particle stones." These stones primarily consist of calcium phosphate and a small amount of urate, with calcium phosphate being the predominant component. The shape and size of such stones vary; they may be round, oval, rhombic, trapezoidal, or irregular in form. Some are only a few millimeters in size, while others can grow to several centimeters. The stone surfaces are generally smooth but may have grooves, protrusions, or small pores referred to as "stone eyes." The main symptom of bilateral renal sand-like stones is flank pain, which may be accompanied by hematuria, urinary frequency, urgency, and decreased urine output. If not treated promptly, these stones can lead to renal failure and even end-stage kidney disease.