History A 32-year-old-man presents with a history of strange experiences since last several months. He occasionally experiences dysgeusia (strange metallic taste sensation), which may last for a few seconds up to about a minute. There are times he has a feeling that everything around him is a repeat but at other times even familiar people and features completely baffle him. After some minutes he is himself again but is often slightly disorientated and is often told about his odd behavior, for example, repeating automatic actions such as lip-smacking.
He himself has no memory of this. There is a sense of something having been lost but he is not quite sure what. These episodes are increasing in frequency and his behavior stranger during these episodes, which is the reason for seeking help now. Another feature that has worried him is that recently he has experienced auditory…
