Bilodi, AKSSudharsan, PSrinivas, TD2026-07-012026-07-012006https://hdl.handle.net/20.500.14572/6828A.K.S Bilodi Department of Anatomy, Sri Devraj Urs Medical College Kolar, India (e-mail: drbilodi@yahoo.com P. Sudharsan Department of Anatomy, Department of Surgery, Sri. R.L. Jalappa Hospital and Research Center Tamaka,Karnataka, India T.D. Srinivas Department of Anatomy, Department of Surgery, Sri. R.L. Jalappa Hospital and Research Center Tamaka,Karnataka, IndiaAbstract Background: The aim of the present study is to report a case of arterio venous malformation thatwas observed in the scalp - Cirsoid aneurysm Case Study: A. case of cirsoid aneurysm was seen in a male patient aged twenty two years who. Came to surgical out patient department with history of headache & a single large pulsatile swelling over left fronto parietal region. with no history of trauma or infection . Histopathological studies showed arteriovenous aneurysm. Multiple ligation with excision of sac was done. Post operative period was uneventful. This vascular malformation is rare congenital anomaly, This congenital anomaly is of profound clinical importance not only to neurosurgeons but also to vascular surgeons and gastro enterologists hence it was studied and reported. Keywords: Arteriovenous aneurysm, Pulsatile swelling, Cirsoid Aneurysm, Rare congenital anomaly, Vascular Malformationen-USArteriovenous aneurysmPulsatile swellingCirsoid AneurysmRare congenital anomalyVascular MalformationArticle