HIGHLIGHTS
SUMMARY
The past several decades have seen increased use of the term "silent PPGL", presumably reflecting increased discovery of tumors that do not produce the usual signs and symptoms of catecholamine excess consequent to their discovery as incidentalomas or during routine surveillance based on hereditary risk or a previous tumor. In other cases, use of the terms "silent" and "non-functioning" tumors have been employed equivalently to describe patients with PPGL who present without signs and symptoms but in whom it is not always clear whether the tumors produce catecholamines. Appropriate definitions according to the . . .
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