The objective of the present report is to describe the case of a patient with delusional parasitosis comorbid with bipolar disorder. The patient had been diagnosed with bipolar disorder over 30 years ago and her mental state was stable without any mood disturbances detected during psychiatric visits. During one of her periodic evaluations, the patient started to complain that worms were infesting her body, which had been occurring for the past 8 years. She was taking lithium carbonate and refused to use an antipsychotic because she had experienced side effects after using this class of drugs. The association between delusional parasitosis and bipolar disorder is rare, and we found only one similar case described in the literature.
Delusional disorder; Ekbom's syndrome; bipolar disorder