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Postgraduate Institute of Medical Education and Research, Department of Neurosurgery, Chandigarh, India DOI : 10.5137/1019-5149.JTN.9244-13.0 Functional neurological disorders (FND) have been a challenge to treat both for neurologists and neurosurgeons. Various ablative as well as non-ablative techniques have been used to treat these disorders. Gamma knife radiosurgery (GKRS) is also being practised to treat refractory obsessive- compulsive disorder (OCD). The subsequent complications of GKRS reported have been variable, with headache being the most common. We discuss here a rare complication of ‘late onset radiation necrosis in bilateral caudate nuclei’ in a patient after receiving GKRS three years back. This case highlights the need to be more cautious before administering ablative procedures in patients suffering with functional disorders. Keywords : Gamma knife radiosurgery, Caudate nucleus, Radiation necrosis, Obsessive compulsive disorder