Elevated Alkaline Phosphatase in Children: An Algorithm to Determine When a "Wait and See" Approach is Optimal

Area of Science:

• Pediatric Gastroenterology
• Clinical Diagnostics
• Biochemistry

Background:

• Elevated alkaline phosphatase (AP) in children often necessitates costly diagnostic workups for potential hepatobiliary or bone diseases.
• A significant portion of these elevated AP cases are benign, identified as transient hyperphosphatasemia (THP).

Purpose of the Study:

• To present a case of transient hyperphosphatasemia (THP) in a pediatric patient.
• To propose a diagnostic algorithm for THP in primary care settings to reduce unnecessary investigations and referrals.

Main Methods:

• Case report of a 27-month-old female with isolated elevated AP following acute gastroenteritis.
• Clinical evaluation in a hepatobiliary clinic, noting absence of gastrointestinal, hepatobiliary, or bone disease symptoms.
• Monitoring of AP levels over time until normalization.

Main Results:

• The patient was diagnosed with transient hyperphosphatasemia (THP).
• Alkaline phosphatase levels normalized spontaneously within four months.
• The case illustrates the benign, self-limiting nature of THP.

Conclusions:

• Transient hyperphosphatasemia (THP) is a common, benign cause of elevated alkaline phosphatase in children.
• A structured diagnostic approach can help identify THP early in primary care.
• Implementing a diagnostic algorithm can prevent costly and unnecessary medical interventions for THP.