UNASSIGNED: A 77-year-old @entity1 presented with a pulsatile blue-tinged mass over the left parotid, present for 5   years, and slowly enlarging. The size of the mass fluctuated during this period and there was no associated @entity158 . The @entity1 reported no history of surgery or @entity130 . @entity455 are rarely encountered within parotid glands in adults. MRI with contrast demonstrated a soft tissue lesion; despite the presence of feeding vessels it was thought unlikely to be an @entity455 or aneurysmal change. The appearance was thought to be in keeping with an enlarged lymph node or sebaceous cyst. Fine-needle aspiration was obtained using ultrasound guidance and yielded bloody fluid. The lesion was closely related to the superficial temporal artery and a diagnosis of a thrombosed @entity2849 was made. The vessel had thrombosed and the decision was made to enact a watchful waiting policy. The @entity1 will be monitored in the outpatient setting.

Idiopathic XXXX : a rare cause of parotid mass.

@entity1 :: ('9606', 'Species') :: ['woman', 'patient'] @entity455 :: ('MESH:D014652', 'Disease') :: ['arterial venous malformation', 'Vascular lesions'] @entity158 :: ('MESH:D010146', 'Disease') :: ['pain'] @entity2849 :: ('MESH:D017541', 'Disease') :: ['pseudoaneurysm'] @entity130 :: ('MESH:D014947', 'Disease') :: ['trauma']
@entity2849 :: (MESH:D017541,Disease) :: ['pseudoaneurysm']
