<prompt> Platypilea is seen inDiaphragmatic palsyPleural effusionpulmonary embolismLt atrial tumor  <response>: platypnea ohodeoxia is typically an ove symptom when the patients posture changes from the supine to the upright position. .Especially when a significant pleural ef- fusion hydrothorax is present, the intrathoracic effusion spreads diffusely over the posterior space of the thorax in the supine position. Ref Davidson 23rd edition pg 619 