The patient underwent stereotactic burr hole drainage of the right frontal abscess. Intra-operatively, purulent fluid was aspirated from the cavity and specimen cultures were positive for Steptococcus anginosus. 

A previous wedge resection was performed many years ago for which the patient could not recall the indication but this was likely for a pulmonary arteriovenous malformation. The intracranial abscess was likely the result of a paradoxical embolism due to the underlying right-to-left shunting.