Microfilaria in malignant pleural effusion: an unusual association.

Lymphatic filariasis is common in tropical countries and is endemic in India. Filariasis presenting with pleural effusion is an unusual presentation. Malignancy in association of filarial pleural effusion is extremely rare. We report a case of a 60-year-old female who presented with chest pain, loss of weight and breathlessness for a few months. Pleural fluid examination revealed malignant cells, along with microfilaria of Wuchereria bancrofti.