It is well known that seizures and psychosis are diagnostic criteria for systemic lupus erythematosus (SLE), however, there could be many other neuropsychiatric symptoms. The American College of Rheumatology Nomenclature provides case definitions for 19 neuropsychiatric syndromes seen in SLE (NPSLE), including cognitive impairment, psychosis, mood and anxiety disorders. Lack of specific manifestations difficult diagnosis and treatment.

To address the diagnostic difficulties that involve the appearance of hypomanic symptoms in the course of SLE treated with high doses of corticoids in a patient with a depressive episode history.

Description of case report and literature revision. We report the case of a 22-year-old woman who presented irritable mood, sexual disinhibition, insomnia and inflated self-esteem. The patient was recently diagnosed with SLE and was on treatment with 50 mg/d prednisone. She had familiar history for bipolar disorder and was taking 20 mg/d paroxetine since the last 6 months after being diagnosed with major depressive episode.

We proposed differential diagnosis between psychiatric symptoms secondary to central nervous system SLE involvement, a comorbid bipolar disorder or prednisone-induced mood symptoms. Fluctuation of hypomanic symptoms during hospitalization, poor relationship with variation in corticosteroid doses, findings on brain MRI compatible with vasculitis and positive antibodies, oriented this case to a neuropsychiatric manifestation of LES.

We should keep in mind that symptoms of neuropsychiatric SLE may vary from more established manifestations of NPSLE to mild diffuses ones. More studies are needed to expand knowledge in the relationship between mood disorders and neuropsychiatric SLE.

The authors have not supplied their declaration of competing interest.