Definition of Carcinomatous myopathy
1. Noun. A disease seen in patients with lung cancer and characterized by weakness and fatigue of hip and thigh muscles and an aching back; caused by antibodies directed against the neuromuscular junctions.
Medical Definition of Carcinomatous myopathy
A condition characterised by muscle weakness that is similar to the symptoms of myasthenia gravis. For this reason, it has been referred to as myasthenic syndrome. This disorder is caused by an insufficient release of neurotransmitter (acetylcholine) by the nerve cells. Unlike myasthenia gravis, as muscle contractions are continued, strength will increase. The cause of Lambert-Eaton syndrome is unknown, but is usually associated with small cell carcinoma of the lung or an autoimmune illness.
(27 Sep 1997)
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