Emergency department presentation of an unusual pleural effusion.

Pleural effusion as a manifestation of malignancy is commonly encountered in clinical practice; most are transudates or exudates of endogenous body fluids. We report a case of pleural effusion that is directly related to the inadvertent infusion of chemotherapeutic agents into the hemithorax of a patient with ovarian carcinoma. With the increasingly common use of outpatient intravenous therapy, emergency department presentations of unusual pleural effusions should be considered.