Unusual localization of Castleman's disease: report of the first case in the nasopharynx.

We describe the first case of isolated nasopharyngeal Castleman's disease mimicking juvenile angiofibroma. Castleman's disease may appear as a local or generalized tumor-like condition, usually in the chest or abdomen, and may involve both the lymph nodes and non-nodal tissues. Since the nasopharyngeal roof is the residence of the pharyngeal tonsils (adenoids) which are rich in lymphoid tissues, such an appearance is predictable. It is emphasized that careful interpretation of radiographs may help to distinguish Castleman's disease from other tumor conditions, such as lymphoma, neurogenic tumor, or even angiofibroma, etc. But the exact diagnosis must be made on the basis of histologic confirmation. In addition to histologic classifications, clinical distinction between the localized and multicentric forms is important in selecting appropriate management. Surgical excision is the first choice and is curative in cases of localized Castleman's disease, but provides little benefit for cases of the multicentric form because of systemic manifestations and rapid deterioration. Thus, antineoplastic agents and steroids may offer an alternative form of therapy for patients with the multicentric form.