CARDIAC TUMORS
Primary
cardiac tumors are rare. The majority are benign; the malignant tumors are
sarcomas. Treatment is excision.
·
Cardiac myxoma is a benign tumor usually arising
within the left atrium nearthe fossa ovalis in decades 3-6 of life; it can
present like mitral valve disease. In 10% of cases there is an autosomal
dominant condition known as Carney complex (myxomas with endocrine
abnormalities and lentigines or pigmented nevi). Cardiac myxoma is
characterized microscopically by stellate-shaped cells within a myxoid
background. Complications include tumor emboli and “ball-valve” obstruction of
the valves.
·
Cardiac rhabdomyoma is a
benign tumor usually arising within the myocardium that is associated with
tuberous sclerosis.
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