ABSTRACT
BACKGROUND AND OBJECTIVE: Nasal polyposis is a chronic inflammatory disease with structural modification of the mucosal epithelium and the lamina propria. In one of recent studies related to the lamina propria, the myofibroblast, which is a potent inducer of extracellular matrix (ECM) synthesis, was found to increase the pedicle area of the nasal polyp. In this study, we intended to quantify epithelial cell proliferation of the polyp. We also tried to identify the active area of epithelial proliferation within nasal polyp and to compare it with the active area of ECM synthesis. MATERIALS AND METHODS: During the endoscopic surgery of nasal polyposis patients, anatomically intact polyp, uncinate process, inferior turbinate and middle turbinate were sampled. The normal nasal mucosa of the inferior turbinate and the septum were obtained from patients who underwent septoplasty. The proliferation cell nuclear antigen (PCNA) expression in the samples were quantified by immunohistochemistry. The PCNA index of the two groups were compared. RESULTS: Epithelial proliferation of the nasal polyp was found to be more active than the normal nasal mucosa. The active area of epithelial proliferation within the nasal polyp was the body area. CONCLUSION: The active area of epithelial proliferation was different from the pedicle area, which is the active area of ECM production.
Subject(s)
Humans , Epithelial Cells , Epithelium , Extracellular Matrix , Immunohistochemistry , Mucous Membrane , Myofibroblasts , Nasal Mucosa , Nasal Polyps , Polyps , Proliferating Cell Nuclear Antigen , TurbinatesABSTRACT
BACKGROUND AND OBJECTIVES: Sinonasal inverted papillomas are benign but topographically aggressive neoplasms that have a high recurrence rate and seem to be associated with malignancy. The etiology of inverted papilloma remains unknown, but some hypotheses suggest that nasal polyps proliferation and chronic inflammation are due to allergy or various infectious lesions. This study was to elucidate the biological characteristics and the role of human papillomavirus (HPV) and Ebstein -Barr virus (EBV) and the expression of p53 protein and proliferating cell nuclear antigen (PCNA) in sinonasal inverted papillomas. MATERIALS AND METHODS: We examined 26 specimens from 26 individuals with normal nasal mucosae (n=10) and inverted papillomas (n=16) to determine the occurance of HPV and EBV infection and the expression of p53 protein and PCNA. RESULTS: Of the 16 Inverted papillomas, HPV DNA was detected in eight cases, HPV 18 was detected in two cases (18%), HPV 16 and HPV 33 were both found in every case (6%), HPV 6 and HPV 16 were coinfected in one case (6%), and other types were found in 3 cases. HPV DNA was not detected in the normal nasal mucosae. EBV DNA was detected in 10 cases (62%) out of 16 inverted papillomas ancl in two cases (20%) of 10 normal nasal mocosae. The altered p53 protein expression was observed in four cases (25%), and positive PCNA staining was detected in four cases (25%) out of 16 inverted papillomas. One positive PCNA staining was detected among 10 normal mucosae. The mean PC10 index was 16.0% in the inverted papillomas group and 4.1% in normal nasal mucosae group. CONCLUSION: An inverse correlation may exist between oncogenic HPV infection and p53 alteration in sinonasa1 inverted papillomas.
Subject(s)
Humans , DNA , Epstein-Barr Virus Infections , Herpesvirus 4, Human , Human papillomavirus 16 , Human papillomavirus 18 , Human papillomavirus 6 , Hypersensitivity , Inflammation , Mucous Membrane , Nasal Mucosa , Nasal Polyps , Papilloma, Inverted , Population Characteristics , Proliferating Cell Nuclear Antigen , RecurrenceABSTRACT
Fibrous dysplasia is a developmental disease of bone in which there is replacement of normal spongiosa and filling of the medullary cavity of affected bones by an abnormal fibrous tissue that contains trabeculae of poorly calcified primitive bone formed by osseous metaplasia. Fibrous dysplasia arising in the paranasal sinus is rare and often presents a diagnostic challenge. It is usually secondary to extension of disease from adjacent bones and is rarely limited to the sinuses. We have described two cases of fibrous dysplasia involving the sphenoid sinus and a case of fibrous dysplasia involving the sphenoethmoid sinus with narrowed orbital apex. A brief update of the clinical aspects, radiolographic appearance, diagnosis, and management of craniofacial fibrous dysplasia is proved.