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The greater petrosal nerve stump is cut away so that a 5-mm segment is excised.
At the time of exposure of the greater petrosal nerve and geniculate ganglion, it was not recognized that there was no bone over this area, a finding that in seen in 5% of patients.
All 64 patients had a permanently non-crying eye on the involved side as a result of the excision of the greater petrosal nerve.

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