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[Transient hyperphosphatasemia of infancy]
Insights
Transient hyperphosphatasemia of infancy is a temporary condition in young children, marked by high alkaline phosphatase levels that normalize quickly. Recognizing this benign disorder avoids unnecessary medical tests and parental anxiety.
Area of Science:
- Pediatrics
- Biochemistry
- Clinical Medicine
Context:
- Infancy and early childhood represent critical developmental periods.
- Elevated serum alkaline phosphatase (SAP) can indicate various underlying pathologies.
- Distinguishing benign conditions from serious diseases is crucial for appropriate patient management.
Purpose:
- To describe the clinical and biochemical features of transient hyperphosphatasemia of infancy.
- To highlight the diagnostic criteria and typical presentation of this benign condition.
- To emphasize the importance of recognizing transient hyperphosphatasemia to prevent unnecessary investigations.
Summary:
- Transient hyperphosphatasemia of infancy is characterized by a marked, temporary elevation in serum alkaline phosphatase (SAP) levels, often discovered during intercurrent infections in children under five.
- Key features include SAP levels 3-30 times the normal limit (originating from both liver and bone), rapid normalization within weeks, and absence of residual liver or bone disease.
- This condition was observed in 4 hospitalized children over a 6-month period, representing 0.3% of admissions.
Impact:
- Early recognition of transient hyperphosphatasemia prevents extensive and costly laboratory workups.
- Accurate diagnosis alleviates unnecessary anxiety for parents and healthcare providers.
- Understanding this benign condition improves diagnostic efficiency in pediatric care.
Abstract:
Transient hyperphosphatasemia of infancy was diagnosed in 4 children hospitalized during a 6-month period (0.3% of all hospitalized children). The characteristic features of this disorder are: 1. elevation of serum alkaline phosphatase (of both liver and bone origin) up to 3-30 times the upper limit of normal for age (usually discovered during intercurrent infection); 2. return of the serum alkaline phosphatase to normal in a few weeks; 3. no residual clinical or laboratory evidence of bone or liver disease. The child is usually less than 5 years old. Recognition of the benign nature of this disorder prevents extensive laboratory workup and unnecessary anxiety.