Dandy, Walter Edward (1866–1946): American neurosurgeon especially remembered for his introduction of ventriculography in 1918, and air encephalography in 1919, and for his surgical treatment of trigeminal neuralgia. References: An operation for the cure of tic douloureux: Partial resection of the sensory root at the pons. Arch Surg 1929; 18:687–734; Treatment of trigeminal neuralgia by cerebellar route. Ann Surg 1932; 96:787–795.