Hypophosphatemic rickets are a heterogenic group of diseases, caused by phosphate metabolism disorders. The most widespread and the best known type is the X- linked hypophosphatemia (XLH). Its initial clinical symptoms usually appear in the first two years of the patient's life. Predominant manifestations include deformation of, usually lower, extremities, growth disturbances, distorted body proportions (short limbs), and teeth abnormalities (dental abscesses, decreased mineralization of dentin). Patients affected by XLH exhibit hypophosphatemia, regular calcemia, a normal or low level of 1.25(OH)2D3. Other types of rickets are less frequent; these include autosomal dominant hypophosphatemic rickets (ADHR), autosomal recessive hypophosphatemic rickets (ARHR), paraneoplastic syndrome and rickets connected to McCune-Albright syndrome. The present article discusses the case of a 7-year-old girl, currently undergoing endocrinological treatment due to the diagnosed hypophosphatemic rickets. The patient has been treated at Orthopedic Clinic since she was 11 months old, because of varus deformity of legs. Due to the fact that treatment with vitamin D3 supplements proved to be unsuccessful, the child was directed to Endocrinology Clinic when she was 4 years and 3 months old. Following the proper diagnosis and the thorough modification of the treatment, the parameters of calcium-phosphate metabolism enhanced and the rate of growth was moderately improved. Lower limbs have remained severely deformed. The current state of research does not allow for full clinical recovery in patients with diagnosed hypophosphatemic rickets. The therapy is long and requires cooperation from the patient, who has to take medicines multiple times a day and present for control tests several times a year. In spite of the early onset of therapy, deformation of lower limbs and insufficient growth cannot be prevented in every case. It appears that the ready therapeutic regimens fail in treating the disease and may also lead to serious side effects, manifesting as secondary hyperparathyroidism, and nephrocalcinosis; moreover, they fail in alleviating limb deformations and growth disturbances. [ABSTRACT FROM AUTHOR]