Atriovenous Malformation of Pinna (A Rare Case) At a Tertiary Care Hospital, Patna, Bihar

Abstract

Introduction: Arteriovenous malformations are vascular abnormalities in which the arterial vasculature connects to the venous, leading to potentially disfiguring and life-threatening complications. Venous malformations (70 %) are the most common CVM (congenital vascular malformation), followed by lymphatic malformations (12 %),arterio-venous malformations (8 %), combined malformation syndromes (6 %) and capillary malformations (4 %).The majority of these lesions are sporadic in nature.Case Report: A 15-year-old male came to E.N.T.OPD at PMCH with a history of swelling and skin discoloration of the right pinna (medial as well as lateral side) since last 2 years.Physical examination Vital signs were normal. Nopallor, no localized lymphadenopathy. A pulsatile swelling with areas of skin discoloration at the right pinna with no necrosis .Ear canal and the tympanic membrane- normal.On palpation Well defined welling, circumscribed margins, soft, non-compressible, spongy, non-tender, and pulsatile with a thrill. Bruit on auscultation.Investigations Routine tests were within normal limits. PTA- bilateral mild S.N.H.L.MRI-High flow vascular malformation seen in right retro auricular region with feeding vessels arising from right superficial temporal artery and branches of right maxillary artery.Treatment- Patient underwent sclerotherapy of the lesion. Postoperatively, the patient was evaluated in the E.N.T OPD at one, two and four weeks following sclerotherapy without recurrence of a mass, pulsation or bruit.