Voltage-Gated Calcium Channel (VGCC) Type N Antibo

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The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

VOLTAGE GATED CALCIUM

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The Voltage-Gated Calcium Channel (VGCC) Type N Antibo test contains 1 test with 1 biomarker.

Voltage-Gated Calcium Channel (VGCC) Type N Antibody

Clinical Significance

N-type calcium channel antibodies are more highly associated with primary lung cancer than P/Q-type. One or all of the autoantibodies in the myasthenia gravis (MG)/LEMS evaluation can occur with neoplasia without evidence of neurological impairment. One or both calcium channel antibodies (P/Q and N) can occur with paraneoplastic and idiopathic cerebellar ataxia, encephalomyeloneuropathies, and autonomic neuropathy. Classical symptoms of LEMS include proximal muscle weakness, fatigability, dry mouth and impotence. When presentation is further complicated with oculobulbar weakness, these symptoms can easily be misinterpreted as MG. However, because VGCC antibodies are positive in only approximately 5% of MG patients, the measurement of these antibodies is very useful in distinguishing LEMS from MG.

Alternative Name(s) 

N-VGCC,NCC

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