Central core disease and malignant hyperthermia syndrome

Area of Science:

• Neuromuscular Disorders
• Genetics
• Anesthesiology

Background:

• Central Core Disease (CCD) is a congenital myopathy often associated with musculoskeletal abnormalities.
• Understanding the genetic and clinical links between CCD and other neuromuscular conditions is vital for patient management.

Observation:

• A four-generation family study revealed musculoskeletal abnormalities in multiple members.
• The proband and his mother exhibited central and multicore myopathy on muscle biopsy.
• A sibling experienced a malignant hyperthermic reaction during surgery, and the proband had intraoperative ventricular dysrhythmias.

Findings:

• Histochemical and electron microscopic analyses confirmed central and multicore myopathy.
• In vitro muscle contracture studies demonstrated susceptibility to malignant hyperthermia in the proband and his mother when exposed to halothane or caffeine.
• While malignant hyperthermia reactions were not reported in other family members, ventricular dysrhythmias were noted in the proband.

Implications:

• Physicians and dentists must recognize the potential association between Central Core Disease and Malignant Hyperthermia susceptibility.
• Comprehensive evaluation of CCD patients, particularly those requiring surgery for musculoskeletal defects, should include in vitro muscle contracture testing for Malignant Hyperthermia.
• Early identification of Malignant Hyperthermia susceptibility can prevent life-threatening anesthetic complications.