1/32. Complete dentures and the associated soft tissues.Some of the conditions of the soft tissues related to complete dentures encountered during a period of 25 years at a university clinic were presented and discussed from the standpoint of the clinical prosthodontist. During this time, over 1,000 denture patients were treated each year. For some conditions, a method of management was offered with treatment by sound prosthodontic principles rather than unneccessary medication. That denture fabrication involves much more than mere mechanical procedures is an understatement. Complete dentures are foreign objects in the oral cavity that are accepted and tolerated by the tissue to a degree that is surprising. As prosthodontists, we can gain satisfaction from the realization that the incidence of oral cancer due to dentures is less than extremely low. At the same time, we must be ever mindful of the statement by Sheppard and associates. "Complete dentures are not the innocuous devices we often think they are." Every dentist must remember that one of his greatest missions is to serve as a detection agency for cancer. The information discussed indicates (1) the need for careful examination of the mouth, (2) the value of a rest period of 8 hours every day for the supporting tissues, and (3) the importance of regular recall visits for denture patients. Robinson stated that while the dental laboratory technician can be trained to aid the dentist in the fabrication of prosthetic devices, his lack of knowledge of reactions and diseases of the oral tissues limits him to an auxiliary role. Complete prosthodontics is a highly specialized health service that greatly affects the health, welfare, and well-being of the patient. It can be rendered only by the true professional who is educated in the biomedical sciences.- - - - - - - - - - ranking = 1keywords = oral cavity, cavity, mouth (Clic here for more details about this article) |
2/32. Solitary squamous cell papilloma of the lung in a 40-year-old woman with recurrent laryngeal papillomatosis.A rare case of recurrent respiratory papillomatosis (RRP) is reported with a review of the literature. A 40-year-old Japanese woman had suffered from RRP since 1 year of age. She developed a pulmonary squamous papilloma with a thin-walled cavity, which was suspected as being lung carcinoma. The trachea and bronchi around the tumor were intact, and no malignant transformation was present. Two types of human papillomavirus, 6 and 16, were detected, both in the laryngeal and pulmonary papillomas by in situ hybridization and the polymerase chain reaction method. To date, only 40 cases of juvenile laryngeal papilloma with pulmonary involvement have been reported in the English literature.- - - - - - - - - - ranking = 0.13508873897291keywords = cavity (Clic here for more details about this article) |
3/32. Giant benign sinonasal squamous papilloma: report of a case.We treated a patient with a giant squamous papilloma in the nasal cavity and maxillary sinus that extended through a bony defect into the oral cavity. The mass was excised with a combined endoscopic, Caldwell-Luc, and transoral approach. Lesions of this type are rare, but when they do occur, the rate of recurrence is high. Therefore, long-term followup, including endoscopic examination, is important.- - - - - - - - - - ranking = 1.1026330087816keywords = oral cavity, cavity (Clic here for more details about this article) |
4/32. Florid cutaneous and mucosal papillomatosis with acanthosis nigricans revealing a primary lung cancer.This is the report of an 80-year-old patient with diffuse brownish hyperpigmentation and velvety thickening of the skin with onset 1 year before. Warty lesions on his limbs were present as well as papillomatous and verrucous lesions on his lips, mouth and eyelid conjunctivae with hyperkeratosis of the nipples. Biopsies, performed at different sites, showed histological pictures consistent with a diagnosis of acanthosis nigricans (AN) with florid cutaneous and mucosal papillomatosis. This type of AN is frequently associated with internal malignancy. In our patient serum levels of tissue polypeptide antigen, carcinoembryonic antigen, cytokeratin fragment and squamous cell carcinoma antigen were high and chest computed tomography scan indicated a large tumour infiltrating the right lung and extending to the mediastinum. Cytological examination of bronchial drainage revealed the presence of neoplastic cells, non-small cell type carcinoma. The most frequent cancer associated with malignant AN is gastric adenocarcinoma. lung tumour has rarely been reported with AN. Malignant AN is sometimes associated with other cutaneous and mucosal warty lesions, as in our patient. These various skin and mucosal lesions are the expression of a systemic epithelial disorder and may help clinicians to suspect a malignant form of AN.- - - - - - - - - - ranking = 0.032455730191267keywords = mouth (Clic here for more details about this article) |
5/32. Congenital unilateral benign papillomatosis of the mouth.A 29-year old man had an unusual unilateral lesion of the mucous membranes of the mouth, including the lips, buccal mucosa, hard and soft palate, and uvula. The lesion was a conglomerate of tiny papillomas and had been present since birth. At the age of 8 years, a mass extending from the uvula into the pharynx was surgically excised. The histopathological findings showed acanthosis, papillomatosis, and an inflammatory infiltrate. The findings represent a rare case and perhaps a unique one, to my knowledge.- - - - - - - - - - ranking = 0.16227865095634keywords = mouth (Clic here for more details about this article) |
6/32. Unusual presentation of a choroid plexus papilloma.An unusual case of a choroid plexus papilloma which completely isolated the right temporal and occipital horns from the remainder of the ventricular system is presented. The tumor secreted large quantities of cerebrospinal fluid and also bled into this obstructed cavity. A gross total removal was accomplished.- - - - - - - - - - ranking = 0.13508873897291keywords = cavity (Clic here for more details about this article) |
7/32. Malignant conversion of florid oral and labial papillomatosis during topical immunotherapy with imiquimod.We report a case of a 61-year-old woman suffering from florid oral papillomatosis with a squamous-cell cancer of the floor of the mouth, which was removed by scalpel surgery combined with a radical neck dissection in 1996. Between 1996 and 2000 several histologically benign papillomatous lesions of mouth and lips were removed with laser and electrosurgery. However, the lesions recurred. In July 2000 hyperkeratotic, wart-like lesions were present at the lower and upper lips and at the right angle of the mouth and the adjacent oral mucosa. Overnight treatment with a topical 5% imiquimod cream on a Monday-Wednesday-Friday schedule was initiated. However, due to severe irritation and pain the application had to be reduced to 4 h per night, three times a week, followed by a therapy-free interval of 2 weeks. Despite this treatment consisting of four cycles of 3 weeks (1 week treatment and 2 weeks pause), the lesions increased markedly in size. A biopsy taken from the tumorous lesion from the right angle of the mouth proved to be a squamous-cell carcinoma. The tumors of the labial and oral mucosal sites as well as the right submandibular lymph nodes were removed by wide scalpel excision. The lips were reconstructed by plastic surgery. 24 months after surgical intervention no recurrence nor metastasis to lymph nodes or distal sites were observed.- - - - - - - - - - ranking = 0.12982292076507keywords = mouth (Clic here for more details about this article) |
8/32. Transmaxillary-transnasal approach to the anterior clivus: a microsurgical anatomical model.Numerous procedures to expose the anterior clival region have been described, including the transoral, transcervical, transseptal-transsphenoidal, transantral, transnasal, bilateral Le Fort I maxillotomy, transbasal, transpalatal, and modifications of the Caldwell-Luc approach. Despite the large number of surgical options available, it may be necessary to have wider access to the midline skull base than these approaches provide. We have developed a microsurgical transmaxillary-transnasal approach to the anterior clivus that has been studied in both dry skull and cadaveric preparations and used clinically. The surgical technique has four stages: 1) antromaxillary; 2) nasal; 3) sphenoidal; and 4) clival. The wider access of this approach is achieved mainly by an osteotomy of the frontal process of the maxilla, which transforms the nasal cavity and the antrum into a single cavity while preserving the functional anatomy of the nose. Cosmesis is preserved by replacement of the cartilaginous nasal septum and the frontal process at the end of the procedure. The technique provides the good cosmetic results of the sublabial approaches and prevents vascular and neural injury in the same way that other anterior approaches do. This transmaxillary-transnasal technique may be used in combination with other approaches for extensive tumors.- - - - - - - - - - ranking = 0.27017747794581keywords = cavity (Clic here for more details about this article) |
9/32. Squamous papillomatosis of the bilateral nasal cavities.The term "papillomatosis" indicates the tendency towards multicentricity and recurrence that these tumors exhibit (Snyder et al. 1972). A typical squamous papilloma arises from the nasal vestibule and is characterized by the epithelial proliferation growing an exophytic manner. We report a rare case of squamous papillomatosis of the bilateral nasal cavities. A 65-year-old man presented with a 2-year-history of bilateral nasal obstruction. Computed tomographic (CT) scans revealed a soft density mass in the bilateral nasal cavities and ethmoid sinuses. Because the tumors were limited to the nasal cavities and anterior ethmoid sinuses, total removal of the tumors was performed endoscopically. On the basis of the clinicopathological findings, the tumors were diagnosed as squamous papillomas. His post-operative course was uneventful, and he is currently free from disease 13 months after surgery. Nasal papillomas usually arise from the unilateral nasal cavity or paranasal sinus. While some cases of inverted (inverting) papillomas arising from the bilateral nasal cavities have been reported, bilateralism of the nasal squamous papillomas is quite rare. diagnosis, clinical behavior and treatment of squamous papillomatosis of the bilateral nasal cavities are reviewed.- - - - - - - - - - ranking = 0.13508873897291keywords = cavity (Clic here for more details about this article) |
10/32. Cylindrical cell papilloma of the nasal cavity and paranasal sinuses. A histochemical and cytochemical study.A cylindrical cell papilloma occurring in the sino-nasal mucosa of a 61-year-old woman was studied histochemically at both light and electron microscopic levels. The cylindrical cells demonstrated distended intracytoplasmic microcysts with numerous microvillous projections on the apical cell membrane. The retained mucosubstance in the cystic spaces stained intensely with HID-TCH-SP sequence and showed no apparent communication with the extracellular space. These findings indicate that the cylindrical cells may be of mucous-secreting cell derivation, being derived from cells possessing abnormal and/or failed secretory function. The property of sulfated mucin in the 'cylindric' intracytoplasmic cysts is suggested to be the result of endodermal displacement or metaplasia of the Schneiderian epithelium.- - - - - - - - - - ranking = 0.54035495589162keywords = cavity (Clic here for more details about this article) |
| | Next -> |