lymphatic malformations, 1351 –1352 neurofibroma, 1354 perineal lesions, 1356 pilomatricoma, 1353 port-wine stains, 1351 pyogenic granuloma, 1353 salmon patches, 1351 spinal dysraphism, cutaneous manifestations of, 1355 –1356 umbilical granuloma, 1353 , 1353 f Vascular papules and nodules, 638 , 638 f Vasculitis, 162 , 1002 –1003 Vasoactive therapy, for shock, 84 Vasopressin, 80 t Vasopressor therapy, 1295 Vasovagal syncope, 518 , 520 , 523 –524 Vecuronium, 39 t Venoocclusive disease (VOD) of the liver, 931 Ventricular arrhythmias, 520 Ventricular assist devices (VADs), 617 –618 Ventricular septal defect (VSD), 369 Ventricular tachycardia (VT), 424 –425 , 607 f Ventriculoseptal defect, 501 Ventriculostomy, 1254 , 1389 Vertebral compression injuries, 1246 compression injuries, 1245 f unilateral facet dislocation, 1246 f Vertebral defects, 1355 Vertebral discitis, 557 Vertebral infection, 305 Vertebral osteomyelitis, 328 Vertebrobasilar migraine, 520 Vertigo, 1329 acute, 157 benign paroxysmal, 158 chronic, 157 common causes of, 157 , 158 t differential diagnosis of