Nonsquamous tumors of the nose and paranasal sinuses.

Nonsquamous tumors of the nose and paranasal sinuses are an uncommon group of neoplasms. Information is only available from case reports and short series. Therefore, conclusions concerning natural history and response to therapy are uncertain for tumors in these sites. The need for complete and timely evaluation of new and changing clinical signs must be emphasized. For each tumor, maximal interaction among the clinician, radiologist, and pathologist is needed to reach the correct diagnosis and plan effective therapy. This interaction is especially important for the deceptively benign-appearing tumors listed in Table 2. These tumors behave biologically in an unpredictable fashion, and long-term follow-up is mandatory.