<prompt> Which is the most common clinical feature of pheochromocytoma?Profuse sweatingPalpitationsDiarrheaHeadaches  <response>: The most common clinical feature is headaches due to paroxysmal hypeension. The mnemonic to remember triad for suspecting pheochromocytoma is PHD- Palpitations, Hypeension,Hypercalcemia Diaphoresis. Note: Remember it is a mnemonic and does not imply that most common feature is palpitations. 