Final answer:
The autopsy of the patient's brain would most likely reveal Pick's inclusion bodies and gliosis, indicating a diagnosis of frontotemporal dementia (FTD).
Step-by-step explanation:
The symptoms described in the patient's case, including behavioral disinhibition, emotional lability, severe naming and word-finding difficulties, hyperorality, stubbornness, inability to plan, and poor judgment, are consistent with the diagnosis of frontotemporal dementia (FTD). Autopsy of the patient's brain would most likely reveal B. Pick's inclusion bodies and gliosis. Pick's disease is a subtype of FTD characterized by abnormal clumps called Pick bodies that are found in the nerve cells of the frontal and temporal lobes of the brain.