The development of proliferative verrucous leukoplakia in oral lichen planus. A preliminary study

BACKGROUND: Was to describe 14 cases of a proliferative verrucous leukoplakia as a clinical evolution of oral lichen planus. MATERIAL AND METHODS: The clinical and histopathological characteristics of 14 cases of OLP that progress towards a plaque-like and verrucous form were indicated, with monitoring over a period of six to 24.3 years. RESULTS: The female/male ratio was 11/3, (78.6 and 21.4%). The mean age when the first biopsy was undertaken was 56.4 years old. None of the patients smoked during the study. As bilateral reticular was clinically diagnostic criterion, the second most frequent clinical form was the plaque form (n=10; 71.4%), followed by the atrophic (n=6; 42.8%), and erosive forms (n=4; 28.5%). Clinically it spread towards attached gingival mucosa and the hard palate. In the histopathologic study, there were a predominance of hyperkeratosis and verrucous epithelial hyperplasia. Three of the cases progressed to a squamous cell carcinoma, and one patient developed two verrucous carcinoma. CONCLUSIONS: Further research is needed to demonstrate if proliferative multifocal oral lichen planus and proliferative multifocal oral leukoplakia are the same disorder but have different behaviour of malignancy for reasons of origin

Relevance of level IIb neck dissection in oral squamous cell carcinoma

BACKGROUND: The purpose of this study was to determine the prevalence of level IIb metastasis in patients with oral squamous cell carcinomas (OSCCs). MATERIAL AND METHODS: A prospective analysis of 56 patients with OSCC who underwent surgical treatment of the primary lesion with simultaneous neck dissection was performed. During neck dissection, level IIb lymph nodes were separately removed and processed. Neck dissection was bilateral in 26 patients (46%) and unilateral in 30 patients (54%). RESULTS: The mean number of nodes found in the level IIb specimens was 4.7 (range: 0-8 nodes). The prevalence of metastasis at level IIb was 0% in pN0 necks and 3.4% in pN+ necks, with an overall prevalence of 1.8%. A significant association between metastasis to level IIb and type of neck dissection was observed. There were no isolated metastases to level IIb without the involvement of other nodes in the remaining neck specimen. Four regional recurrences were observed during follow-up. CONCLUSIONS: Based on our findings, we suggest that dissection of the level IIb region in patients with OSCC may be required only in patients with multilevel neck metastasis or if level IIa metastasis is found intraoperatively

Prevención de la obesidad infantil. Papel del dentista de Atención Primaria / Prevention of childhood obesity. Role of Primary Care dentist

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Adenoma sebáceo de la glándula parótida / Sebaceous adenoma of the parotid gland

Los tumores de las glándulas salivales constituyen un área importante de la patología oral y maxilofacial. La mayor parte de las neoplasias glandulares salivales son benignas, representando las malignas entre el 15 y el 32% del total. La localización más común de estas entidades es la glándula parótida, en la que asientan hasta el 80% de todos los casos. En este artículo se presenta un caso de adenoma sebáceo salival, de localización parotídea. El tumor, formado por células epiteliales que tapizan conductos, exhibe amplias áreas de diferenciación sebácea y zonas con metaplasia oncocítica. El patrón histológico es predominantemente quístico, observándose cavidades rellenas con material sebáceo. Si bien la presencia de glándulas sebáceas en las glándulas salivales es frecuente, las neoplasias exclusivamente formadas por las mismas son muy infrecuentes. Dada su rareza, este tumor plantea problemas diagnósticos diferenciales con otras entidades benignas y malignas. Su tratamiento implica la extirpación de la lesión, lo que generalmente involucra la eliminación de la glándula en la que ha surgido. El presente caso constituye el séptimo publicado de esta entidad

Tumors of the salivary glands constitute an important field of oral and maxillofacial pathology. The majority of salivary gland neoplasms are benign, with malignant salivary tumors accounting for 15 to 32 percent. The most common site for salivary gland tumors is the parotid gland, accounting up to 80 percent of all cases. This article reports the pathologic picture in a case of sebaceous adenoma of the parotid gland. The tumor was composed of epithelial cells lining ducts and closely associated with broad areas of sebaceous differentiation. The growth pattern was predominantly cystic, with cavities filled with sebaceous material. Areas of oncocytic metaplasia were also seen. The presence of sebaceous glands in salivary neoplasms is frequent, however, and in spite of this, salivary neoplasms constituted partially or entirely of these cells are rarely observed. To the surgeon and pathologist, the major problem in dealing with sebaceous adenoma is the recognition of this rare entity, avoiding confusing with other more aggressive neoplasms. The treatment involves surgical excision. The addition of the current case to the previously published data brings the total number of parotid sebaceous adenoma to seven

Treatment with removable prosthesis in hypohidrotic ectodermal dysplasia. A clinical case

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Ectodermal dysplasias form part of a wide range of syndromes presenting abnormal development of two or moretissues derived from the ectoderm.Hypohidrotic ectodermal dysplasia is a congenital syndrome, characterized by hypotrichosis (hair is sparse, fine and weak; anomalies in the skin and nails), hypohidrosis (due to the paucity of sweat glands which in turn gives rise to sweat disorders) and hypodontia (partial, and occasionally total, absence of primary and/or permanent dentition). A case of a child with hypohidrotic ectodermal dysplasia with oligodontia and marked resorption of the maxillary and mandibular alveolar ridges is presented. A prosthetic rehabilitation in the form of a removable acrylic prosthesis was made, achieving excellent esthetics, functionality and adaptation, thanks to which a considerable improvement in self-esteem has been obtained

Motilidad y daño acrosomal del semen caprino congelado en pajillas de 0.25 ml y 0.5 ml y descongelado a dos diferentes ritmos de temperatura / Motility and acrosomal damage of buck semen frozen in 0.25 ml and 0.5 ml straws and thawed at two different temperature rates

Se colectaron 16 eyacuaciones de 4 sementales caprinos por medio de la vagina artificial y se evaluaron las siguientes características: volumen, concentración espermática, motilidad progresiva y morfología acrosomal. Cada eyaculado se dividió en dos partes y se diluyó con Tris-Yema de huevo. El semen diluido se envasó en pajillas de 0.25 y 0.5 ml, cada una conteniendo 100millones de espermatozoides mótiles. Las pajillas se congelaron en vapores de nitrógeno líquido y se descongelaron a 37ºC/15 seg. o a 55ºC/8 seg. En las muestras descongeladas se determinó la motilidad progresiva, la recuperación de espermatozoides mótiles y el daño acrosomal. La motilidad progresiva al descongelar las pajillas de 0.5 ml fue de 62.8 por ciento (37ºC/15 seg) y 58.7 por ciento (55ºC/8 seg) y en la pajilla de 0.25 ml de 59 por ciento (37ºC/15 seg) y 60 por ciento (55ºC/8 seg) (P> 0.05). El daño acrosomal fue mayor (12.3 por ciento) en las pajillas de 0.5 ml descongeladas a 55ºC/8 seg que en los demás tratamientos (P < 0.05). La descongelación del semen caprino a 37ºC/15 seg es una técnica más sencilla a nivel de campo e implica menor riesgo. La motilidad progresiva y el porcentaje de daño acrosomal del semen caprino obtenidos en este trabajo, se encuentran dentro de los criterios establecidos para su aplicación en la inseminación artificial

Carcinoma fusocelular de la cavidad oral. A propósito de un caso / Spindle cell carcinoma of the oral cavity. Report of a case

El carcinoma fusocelular es una variedad del carcinoma de células escamosas, de infrecuente presentación e histogénesis controvertida. Aunque puede afectar a cualquier parte de la economía, se localiza más frecuentemente en las vías aerodigestivas superiores. La mayoría de los ubicados en la cavidad oral son invasores y tienen mal pronóstico.Presentamos un caso de carcinoma de células fusiformes que afectaba al espacio masticador, encontrándose la mucosa supraadyacente libre de neoplasia. Hacemos especial hincapié en la metodología histológica e inmunohistoquímica (positividad para las citoqueratinas de bajo peso molecular y, con menor intensidad, para las citoqueratinas de alto peso molecular y la vimentina) empleada para su diagnóstico, así como una valoración de los factores pronósticos y las posibilidades terapéuticas que ofrece esta infrecuente neoplasia (AU)