Magnetic resonance imaging revealed an enhancing anterior fossa skull base mass that displaced the right orbitofrontal lobe (Figure 1). Prior to resection (December 2000), bedside neurologic testing found the patient alert and completely oriented. He scored 25 of 30 on the Folstein Mini-Mental State Examination,6 missing points for delayed recall, impaired copy (Figure 2A), and an inability to write a legible sentence (Figure 2B). His memory, however, was intact according to a 16-item test of enhanced cued recall on which he freely retrieved 6 objects and the remaining 10 with cues. He named the previous 5 presidents. He was able to state digit spans of 7 going forward and 4 in reverse. On the clock-drawing test, he exhibited marked constructional apraxia, and this did not improve with the figure copy test (Figure 2A). Simultanagnosia was absent. Although spontaneous language output, repetition, comprehension, and reading skills were intact, his writing was illegible (Figure 2B). The patient was able to spell, and prosody was normal. During 1-minute intervals he named 5, 7, and 5 words beginning with C, F, and L, respectively (bottom of first percentile). He named 11 animals during 1 minute. He verbally shifted between letter and number sets, conceptualized, performed sequential hand movements, and inhibited motor responses on the Luria go–no go test.7 He was without ideomotor apraxia. Results of olfactory testing appeared normal because the patient correctly identified peanut butter and coffee by scent. He performed normally on a task of visuoperception (Luria figure-ground analysis8).