<prompt> All of the following are features of SVC Syndrome except -Facial swellingDilatation and congestion of neck veinsHeadacheHoarseness of voice  <response>: Answer- D. Hoarseness of voiceSuperior vena cava syndrome SVCS, is a group of symptoms caused by obstruction of the superior vena cava.Shoness of breath is the most common symptom, followed by face or ium swelling.Following are frequent spnptoms:Diftculty breathingHeadacheFacial swellingVenous distention in the neck and distended veins in the upper chest and armsUpperlimb edemaLightheadednessCoughEdema swelling of the neck called the collar of Stokes 