Kaposi's sarcoma (KS) is a neoplastic vascular disorder characterized by multiple reddish blue nodules which, according to the original description (Kaposi, 1872), usually present on the skin of the upper and lower extremities. It is not until the disease progresses that nodules appear on the skin of the head and neck, on mucosal membranes and as visceral lesions. However, with the large increase in the incidence of this tumour associated with the acquired immune deficiency syndrome (AIDS) epidemic, there have been increasing numbers of cases of Kaposi's sarcoma presenting primarily on the skin or mucosa of the head and neck. The most common sites reported are within the oral cavity, particularly on the palate. Other mucosal sites are rare. We present an unusual case where the primary manifestation of the Kaposi's sarcoma was in the nasal mucosa and stress the importance of this diagnosis not being overlooked.