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[A case of hypophosphatasia in an infant]
Insights
Hypophosphatasia is a rare genetic disorder causing skeletal abnormalities and low alkaline phosphatase. This case study details an infant with rickets, highlighting diagnostic findings and therapeutic challenges.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Hypophosphatasia is a rare inherited metabolic disorder.
- It is characterized by defective bone mineralization.
- Key biochemical markers include low serum alkaline phosphatase and elevated phosphorylethanolamine.
Observation:
- A 4-month-old infant presented with clinical signs of rickets.
- Laboratory tests revealed normal calcium and phosphorus, but low alkaline phosphatase activity.
- Elevated plasma and urine phosphorylethanolamine (PEA) levels were detected.
Findings:
- Skeletal X-rays showed poor bone mineralization and skull defects.
- The findings are consistent with a diagnosis of hypophosphatasia.
- The underlying biochemical basis for inadequate bone calcification remains unclear.
Implications:
- This case highlights the diagnostic challenges of hypophosphatasia in infants.
- Early diagnosis and management are crucial for skeletal health.
- Further research into the biochemical mechanisms is needed for effective therapeutic strategies.
Abstract:
Hypophosphatasia is a rare familial disease characterized by abnormalities of the skeleton, low serum alkaline phosphatase level and presence of abnormal quantities of phosphorylethanolamine in plasma and urine. The biochemical bases of inadequate calcification of the bone matrix are unknown. We report the case of a 4 month-old infant who presented symptoms of rickets. Laboratory analysis showed normal serum Ca and P levels, low serum alkaline phosphatase activity, PEA level increased in plasma and urine. X-ray examination of the bones disclosed poor mineralization and the presence of focal defects of the skull. The therapeutic problems are discussed.