Search results for "CAS"
showing 10 items of 26112 documents
A large ameloblastic fibro-odontoma of the right mandible
2007
The ameloblastic fibro-odontoma is a rare mixed odontogenic tumor. It occurs predominantly in children and young adults with no sex predilection and locates most often in the posterior segment of the mandible. A painless swelling is the most common clinical sign. Radiologically, ameloblastic fibro-odontoma shows a circumscribed radiolucency, which contains radio-opaque foci of various sizes and shapes. Histological examination reveals a fibrous soft tissue, islands of odontogenic epithelium and a disordered mixture of dental tissues. The tumor produces enamel or enamel matrix, dentin and cementum. The treatment of ameloblastic fibro-odontomas usually consists of enucleation or surgical cure…
Oral manifestations of Cowden?s disease : presentation of a clinical case
2006
Cowden?s disease, or multiple hamartoma syndrome, is an autosomal dominant genodermatosis, characterized by the presence of multiple cutaneous hamartomas, oral fibromas and benign acral keratosis. It affects multiple organs (breast, thyroids, stomach, colon), with the strong possibility of malignant neoplasia developing in these organs. We present a case of this rare syndrome, highlighting the presentation of some clinical characteristics that, in suspected cases, can help to establish an early diagnosis of this disease, this being of great importance given the high frequency of tumors in people with this clinical picture.
Evolución del germen dental trasplantado heterotópicamente en la dermis: un estudio histológico en la rata
2004
En este estudio hemos analizado la potencialidad de desarrollo del germen dental en fase de corona. Para ello, los gérmenes dentales de rata recién nacida fueron trasplantados en las bolsas dérmicas de la oreja de ratas isogénicas. Siete y catorce días después del trasplante, se desarrollaron las estructuras morfológicas dentales típicas, con ameloblastos y odontoblastos bien diferenciados. Ulteriormente, los procesos de reacción inflamatoria del tejido huésped con infiltración celular abocaron a la desaparición de los tejidos dentales. Desde el primer momento de nuestro análisis, los trasplantes desarrollaron una dentina anómala u osteoide cuyo tamaño fue paulatinamente incrementando con e…
Gastroesophageal reflux diagnosed by occlusal splint tintion
2006
The gastroesophageal reflux (GER) disease is a very frequent digestive disorder, mainly characterised by the reflux of the gastric acidic content to the esophage in abnormal quantities. There are different situations that favour this situation but almost in all of them rely an incompetence of the esophagic sphincter. The clinical consequences are many, including oral manifestations. Among all of them the most frequent is the esophagitis followed by symptoms at the pharynx or larynx and finally, the oral cavity. At this level fundamentally we will find enamel and oral mucosa erosions. We report the case of a patient who was indirectly diagnosed of her esophague disease by the observation of …
Expression of ?-catenin in carcinoma in pleomorphic adenoma, pleomorphic adenoma and normal salivary gland : An immunohistochemical study
2006
Objetives. Pleomorphic adenomas are the most frequent type of epithelial salivary gland neoplasms, and their malignant counterpart, the carcinoma in pleomorphic adenomas, is much less common. ?-catenin is a cell adhesion molecule associated with the invasion and metastasis of carcinomas of the head and neck, esophagus. The objective of this study was to detect the expression of ?-catenin in pleomorphic adenomas, carcinomas in pleomorphic adenomas and normal salivary glands to discuss its role in the development of these two lesions. Study Design. The expression of ?-catenin (BD Transduction Laboratories) was analyzed by immunohistochemistry in formalin-fixed, paraffin embedded specimens by …
Asociación entre alteraciones psicológicas y la presencia de Liquen plano oral, Síndrome boca urente y Estomatitis aftosa recividante
2004
OBJETIVO: El propósito de este estudio fue determinar la relación existente entre el Liquen Plano Oral (LPO),Estomatitis Aftosa Recividante (EAR), Síndrome de Boca Urente (SBU) y las alteraciones psicológicas del paciente, tales como el estrés, la ansiedad y la depresión. DISEÑO DEL ESTUDIO : Fueron estudiados 18 pacientes con EAR , 9 pacientes con LPO y 7 pacientes con SBU, que presentaron la lesión en el momento del examen, más un grupo control de 20 pacientes sanos. Ambos grupos fueron extraídos de centros hospitalarios y docentes, donde el diagnóstico clínico fue realizado por un equipo de patólogos orales. A los pacientes se les aplicó dos instrumentos de medición del estado psicológic…
Florid cemento-osseous dysplasia: A case report
2007
Cemento-osseous dysplasias are a group of disorders known to originate from periodontal ligament tissues and involve, essentially, the same pathological process. They are usually classified, depending on their extent and radiographic appearances, into three main groups: periapical (surrounds the periapical region of teeth and are bilateral), florid (sclerotic symmetrical masses) and focal (single lesion) cemental dysplasias. Florid cemento-osseous dysplasia clearly appears to be a form of bone and cemental dysplasia that is limited to jaws. Patients do not have laboratory or radiologic evidence of bone disease in other parts of the skeleton. For the asymptomatic patient, the best management…
Epstein-Barr virus in oral proliferative verrucous leukoplakia and squamous cell carcinoma : a preliminary study
2008
The aim of this study was to analyze proliferative verrucous leukoplakia (PVL) and oral squamous cell carcinoma (OSCC) for the possible presence of Epstein-Barr virus (EBV). We studied three groups: Sub-Group 1 was composed of 10 patients with PVL, (6 of whom had developed OSCC); Sub-Group 2 comprised 5 patients with OSCC but no preceding PVL; and Sub-Group 3 were 5 controls with clinically normal oral mucosa. Oral biopsies from all cases were examined for Epstein-Barr virus (EBV) by nested PCR. EBV was detected in 60% of Sub-Group 1 patients (PVL ) and in 40% of Sub-Group 2 (OSCC), but in 0% of SubGroup 3 (controls).
Manifestaciones orales de la infección por VIH en la infancia: artículo de revisión
2004
La gran mayoría de niños con infección por VIH presentan, dentro de sus primeros signos de enfermedad, manifestaciones orales. Estas lesiones orales no están producidas directamente por dicho virus, son manifestaciones asociadas a la infección por VIH, ya que no son patognomónicas de la infección. Algunas de estas lesiones orales tienen un valor pronóstico de cara a la evolución de la infección y la aparición de SIDA, independientemente de otros marcadores de uso más común. Los factores de riesgo esenciales que predisponen al desarrollo de dichas manifestaciones orales son el bajo número de linfocitos T CD4+, xerostomía y la ausencia de tratamiento antiretroviral. Infecciones oportunistas c…
A boy with oral hair: Case report
2007
In personal communication we have never seen or heard of hair being detected in the oral cavity. Even Julia Pastrana, the famous ?Bearded Lady? of the 1800?s, had no record of oral hair, although her entire body was covered with hair. Extensive records of her oral condition, including plaster models of her teeth have been preserved in the Odontological Museum of the Royal College of Surgeons in London city. She suffered from excessive gingival hyperplasia, but apparently no hair existed within the mouth. Some rodents have oral hair as a normal occurrence, but the condition is apparently limited in the animal kingdom. A case of hair occurring naturally in the mouth has been reported only twi…