Hypophosphatasia (HPP) is an uncommon genetic condition that has detrimental effects on the growth and development of bones and teeth. The process of mineralization, which involves the deposition of essential minerals like calcium and phosphorus in developing bones, is crucial for the formation of strong and healthy bones. However, HPP disrupts this process, leading to the development of weakened bones and teeth. The symptoms of HPP can vary significantly, and individuals of all ages are susceptible to this progressive disorder.
Prenatal and Perinatal Hypophosphatasia (HPP)
Detecting signs of prenatal or perinatal hypophosphatasia (HPP) can be done through an ultrasound examination. Perinatal HPP refers to a fatal form of the condition, and in such cases, a fetus may exhibit symptoms like shortened and bowed limbs, as well as underdeveloped ribs. After birth, newborns with perinatal HPP often experience severe respiratory problems due to rib malformations and underdeveloped lungs.
On the other hand, fetuses with prenatal benign HPP generally display bowed limbs, but the malformations tend to improve significantly shortly after birth. As the child grows, their condition begins to resemble that of infantile HPP.
The Presentation of Hypophosphatasia in Infants
While some infants with hypophosphatasia may not display any signs or symptoms at birth, certain indicators may emerge during the first few months of life. Infantile HPP, characterized by these symptoms, commonly manifests in affected children. These infants may struggle with weight gain or fail to grow at the expected rate. Improper development of the skull can occur, potentially resulting in increased pressure on the cerebrospinal fluid surrounding the brain. This elevated pressure may lead to symptoms such as swollen eyes or frequent headaches. Furthermore, deformities in the chest and ribs may develop in the infant’s bones.