Inverting papilloma of the nose and paranasal sinuses

Computed tomography of the face and paranasal sinuses: Part II. Abnormal anatomy and pathologic conditions

Computerized tomography is extremely useful in delineating abnormal anatomy and pathologic conditions of the face and paranasal sinuses. The familiarity with normal anatomy is essential. Expert interpretation of CT scanning allows superior diagnosis of and treatment planning for lesions of the face and paranasal sinuses.

Computed tomography of the face and paranasal sinuses: Part I. Normal anatomy

Computed tomographic (CT) scanning of the face and sinuses has improved markedly with modern equipment and methods. Expertise in facial and sinus anatomy as seen by CT is invaluable to the clinician. A review of normal CT anatomy is presented as a basis for diagnosing pathologic conditions.

Demonstration of secretory component, IgA, and IgM by the peroxidase-antiperoxidase technique in inverted papillomas of the nasal cavities

Fifteen inverted papillomas were examined by the peroxidase-antiperoxidase method for their ability to synthesize secretory component (SC) and to take up IgA and IgM. In each case, SC and IgA could be localized to the apical cytoplasm of some tumor cells. In addition, secretory component, IgA, and IgM were observed as the main constituents of hyaline globules lying in the intracytoplasmic lumina of one columnar cell variant of inverted papilloma, suggesting an intact transepithelial transport mechanism of polymeric immunoglobulins. Goblet cells, found only in the transitional cell variant of inverted papilloma, did not react with anti-SC, anti-IgA, or anti-IgM. Since SC can be utilized as a marker to differentiate columnar cells from goblet cells, transitional cell papillomas may originate from undifferentiated reserve cells, which retain their capacity to differentiate into both columnar cells and goblet cells. In contrast, in columnar cell papillomas only differentiated columnar cells are integrated into the neoplastic process.

Malignant inverted papilloma characterized by proptosis

An inverted papilloma, presumably originating in the ethmoid sinus, was characterized by proptosis in a 67-year-old man. Clinically and radiologically it simulated a primary orbital tumor. Squamous carcinoma appeared in this lesion; irradiation and exenteration, 3 1/2 years after onset of symptoms, failed to prevent fatal intracranial extension.