Hypocalcemia. Differential diagnosis and mechanisms.

Area of Science:

• Endocrinology
• Nephrology
• Biochemistry

Background:

• Hypocalcemia exhibits significant individual variability in clinical presentation.
• The speed of hypocalcemia development dictates symptom presence.
• Symptoms range from neurological (seizures, mental changes) to physical (tetany, skin changes).

Purpose of the Study:

• To outline the diverse clinical manifestations of hypocalcemia.
• To identify the various etiological factors contributing to hypocalcemia.
• To highlight key laboratory tests for evaluating hypocalcemia.

Main Methods:

• Review of clinical signs and symptoms associated with hypocalcemia.
• Categorization of etiological factors based on calcium and hormone metabolism.
• Identification of essential laboratory parameters for diagnosis.

Main Results:

• Clinical signs include tetany (Chvostek's, Trousseau's), seizures, altered reflexes, papilledema, mental status changes, and skin alterations.
• Etiologies encompass gastrointestinal issues, parathyroid hormone dysfunction, vitamin D metabolism defects, and magnesium imbalances.
• Laboratory evaluation is crucial, involving measurements of total/ionic calcium, magnesium, parathyroid hormone, vitamin D metabolites, and nephrogenous cyclic adenosine monophosphate.

Conclusions:

• Hypocalcemia's presentation is highly variable and depends on the rate of calcium decline.
• A comprehensive understanding of etiological factors is essential for effective management.
• Targeted laboratory testing is critical for accurate diagnosis and guiding treatment strategies.