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[Hypomagnesemia and chondrocalcinosis].

J P de Filippi1, P P Diderich, J M Wouters

  • 1Afd. Interne Geneeskunde, Sint Franciscus Gasthuis, Rotterdam.

Nederlands Tijdschrift Voor Geneeskunde
|January 18, 1992
PubMed
Summary
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A rare cause of chondrocalcinosis in a 45-year-old female was identified as hypomagnesaemia due to excessive renal magnesium loss. Magnesium supplementation effectively treated the condition, highlighting the importance of screening for metabolic disorders.

Area of Science:

  • Nephrology
  • Endocrinology
  • Rheumatology

Background:

  • Chondrocalcinosis, a condition characterized by calcium pyrophosphate dihydrate crystal deposition in cartilage, can be associated with various metabolic derangements.
  • Hypomagnesaemia, or low magnesium levels, is a recognized but uncommon cause of chondrocalcinosis.
  • Renal tubular dysfunction can lead to excessive loss of essential minerals, including magnesium and potassium.

Observation:

  • A 45-year-old female presented with chondrocalcinosis.
  • Laboratory investigations revealed significant hypomagnesaemia and hypokalemia.
  • The patient exhibited impaired renal conservation of magnesium and potassium, suggesting idiopathic renal tubular dysfunction.

Findings:

  • Excessive renal loss of magnesium was identified as the primary cause of hypomagnesaemia and subsequent chondrocalcinosis.

Related Experiment Videos

  • The patient's hypokalemia was attributed to impaired renal potassium handling.
  • Magnesium supplementation was initiated and successfully resolved the patient's symptoms.

    • Implications:

    • This case underscores the importance of investigating treatable metabolic disorders in patients presenting with chondrocalcinosis, particularly in younger individuals.
    • Early diagnosis and management of hypomagnesaemia can prevent the progression of chondrocalcinosis and associated complications.
    • Screening for electrolyte imbalances and renal tubular function is crucial in the etiological workup of chondrocalcinosis.