Olfactory reference syndrome manifests in a variety of psychiatric disorders.

Olfactory reference syndrome (ORS) is a rare psychiatric condition characterized by isolated olfactory hallucinations or illusionary misinterpretations of odours with delusional self-reference and a typical contrite reaction. The aetiopathology of the disorder is unclear. Three cases of ORS are presented, which show the typical clinical symptom constellation, while pointing to various underlying psychiatric illnesses and differing treatment responses. Nosological aspects are discussed on the basis of the available literature.