Various versions of this one kicking around ... it seems to be connected with the Thessalonki Necropolis story ... from AP via Yahoo:

Greek archaeologists said Tuesday they have unearthed rare evidence of what they believe was brain surgery performed nearly 1,800 years ago on a young woman — who died during or shortly after the operation.

Although references to such delicate operations abound in ancient writings, discoveries of surgically perforated skulls are uncommon in Greece.

Site excavator Ioannis Graikos said the woman's skeleton was found during a rescue dig last year in Veria, a town some 46 miles west of Thessaloniki.

"We interpret the find as a case of complicated surgery which only a trained and specialized doctor could have attempted," Graikos said.

We've had a couple of trepanation items at rc before ... back in 2006 we had an example from Bulgaria ... back in 2004, a case from Chios was one of our 'top xx archaeological discoveries for 2003' (scroll down for the full item, with what Hippocrates had to say, or click here for the press item from Kathimerini) ... here's an excerpt from a Call for Papers a few years back as well, which might be useful for folks wanting to read more:

This colloquium would be the fourth in a series of interdisciplinary conferences on the general theme of the Archaeology of Medicine organised by the Centre for the History of Medicine of the University of Birmingham Medical School (UK). The first in 1998 was entitled ‘The Archaeology of Medicine’ [published as Robert Arnott (ed.), The Archaeology of Medicine, Oxford, 2002 - BAR International Series 1046]; and the second in 2000 concerned ‘Cranial Trepanation in the Ancient World’ [published as Robert Arnott, Stanley Finger and C. U. M. Smith (eds.), Trepanation: History, Discovery, Theory, Lisse, Swets and Zeitlinger, 2003].

UPDATE: here's a nice photo from National Geographic: