Figure 6.

Diagnostic algorithm for investigating patients with language or visuospatial disturbances. See Figure 7 for flowchart 3. CBS, corticobasal syndrome; GRN, progranulin; LBD, Lewy body disease; LPA, logopenic aphasia; MAPT, micro-tubule associated protein Tau; PCA, posterior cortical atrophy; PET, positron emission tomography; PNFA/AOS, progressive nonfluent aphasia/apaxia of speech; PPA, primary progressive aphasia; PS, presenilin; SD, semantic dementia; SNCA, alpha-synuclein; SPECT, single photon emission computed tomography.