Primary Progressive Nonfluent Aphasia

**Definition:** A form of frontotemporal lobar degeneration and a progressive form of dementia characterized by motor speech impairment and AGRAMMATISM, with relative sparing of single word comprehension and semantic memory.

**Tree numbers:** - C10.228.140.380.132.600 - C10.228.140.380.266.600 - C10.574.950.300.600 - C10.597.606.150.500.800.100.155.600 - C18.452.845.800.300.600 - C23.888.592.604.150.500.800.100.155.600 - F03.615.400.125.600 - F03.615.400.380.600

**Synonyms:** - Progressive Nonfluent Aphasia - Non-fluent Primary Progressive Aphasia - PPA Syndrome