Ultrasound guided wire localisation to aid surgical biopsy of impalpable parotid oncocytoma.

Ultrasound guided wire localisation (UGWL) is an effective way of helping a surgeon find an impalpable lesion but its use in the head and neck has only recently been described. The authors present an unusual case of bilateral multi-focal parotid oncocytoma, in which UGWL was combined with extracapsular dissection to obtain an impalpable lesion for histological examination following initial equivocal core biopsy.