In the renal sinus, there are 7 to 8 funnel-shaped calyces that encircle the renal papillae, 2 to 3 calyces that form a large calyx, and 2 to 3 large calyces that converge to form a flattened, funnel-shaped renal pelvis. The blunted renal calyx is the flattened, funnel-shaped shape of the renal calyx due to some organic condition. So, how can blunted renal calyces be prevented? Here are the preventive measures for blunted renal calyces: Clinically, it is mostly seen in adolescents, whose main manifestations of renal damage are proteinuria, microscopic hematuria edema and hypertension, and occasionally nephrotic syndrome, with a relatively benign course, and only 10% of patients enter renal failure at a late stage. Extra-renal manifestations include dystrophy of the nails, patellar agenesis on one or both sides, elbow deformities, angular pelvis and other skeletal abnormalities. Nail-patellar syndrome is most often noted for difficulty walking due to patellar agenesis and can be diagnosed based on the typical skeletal changes, and most often confirmed in the presence of renal damage. Radiological examination shows the iliac angle as the characteristic change, which has clear diagnostic significance. Nail-patellar syndrome is a genetic disorder with no effective preventive measures. Since the disease may be congenital or hereditary in nature, it is basically impossible to effectively prevent it, except by having appropriate tests done at the time of conception. If you have a family member with the disease, you should pay more attention to your future child. If you are diagnosed with this disease, you should go to the hospital early for relevant treatment, actively cooperate with the doctor on the treatment, and do as the doctor says.