Table 2

Presenting features and investigations

Patient	Presenting symptom	EEG diffuse slowing	EEG triphasic	CT	SPECT abnormality	SPECT emphasis
+, abnormality present; −, abnormality absent.
1	Visual disorder	+	+	Normal	Multiple	Posterior
2	Anomia	+	+	Normal	Multiple	Left anterior
3	Agraphia	+	+	Normal	Multiple	Left
4	Personality change	+	−	Atrophy	Patchy	Left anterior
5	Poor concentration	+	+	Normal	n.a.	n.a.
6	Unsteadiness, poor memory	+	+	Atrophy	n.a.	n.a.