Patients who suffer from blunted renal calyces should learn more about the diagnosis and treatment of finger (toe) nail patellofemoral syndrome. The features of typical finger (toe) nail patellofemoral syndrome are mainly abnormal in four areas: finger (toe) nail, knee, elbow and iliac bone, in addition to other body systems; such as the kidneys, eyes, etc. The main diagnosis of nail-patellar syndrome is based on family history, and the typical clinical signs are X-ray signs of the bones and proteinuria. A renal biopsy is performed if necessary. The main clinical manifestations of renal damage are proteinuria, microscopic hematuria edema and hypertension, and occasionally nephrotic syndrome. The course of the disease is relatively benign, and only 10% of patients enter renal failure at a late stage. Extra-renal manifestations are nail dystrophy, patellar agenesis on one or both sides, elbow deformity, angular pelvis and others.