RESUMO
Dermatofibroma is a proliferation of spindle cells located in the dermis. We used scanning electron microscopy to examine two histologically confirmed lesions and observed preserved collagen bundles in the perilesional area. In the lesional area, the collagen was denser, without formation of bundles. Higher magnification showed collagen with mesh-like appearance similar to stretched tufts of cotton. Very high magnification evidenced the tufts of cotton and spindle cells measuring 2 to 12 microns.
Assuntos
Histiocitoma Fibroso Benigno/patologia , Neoplasias Cutâneas/patologia , Derme/patologia , Feminino , Humanos , Microscopia Eletrônica de Varredura , Pessoa de Meia-IdadeRESUMO
Abstract: Dermatofibroma is a proliferation of spindle cells located in the dermis. We used scanning electron microscopy to examine two histologically confirmed lesions and observed preserved collagen bundles in the perilesional area. In the lesional area, the collagen was denser, without formation of bundles. Higher magnification showed collagen with mesh-like appearance similar to stretched tufts of cotton. Very high magnification evidenced the tufts of cotton and spindle cells measuring 2 to 12 microns.
Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Neoplasias Cutâneas/patologia , Histiocitoma Fibroso Benigno/patologia , Microscopia Eletrônica de Varredura , Derme/patologiaRESUMO
Várias complicações podem estar relacionadas a procedimentos cirúrgicos na área de cabeça e pescoço. O pneumomediastino, pneumotórax e enfisema subcutâneo estão descritos em menor número de casos, em relação às demais complicações. Nesses procedimentos, constata-se importante o cuidado com a técnica cirúrgica, evitando manobras cirúrgicas agressivas, além de parcimônia no uso de máscaras de oxigênio sob pressão positiva e intubação. Este estudo relata um caso de enfisema subcutâneo, pneumotórax e pneumomediastino, com aparecimento 48 horas após tonsilectomia palatina, e discute possíveis mecanismos, morbidade, formas de prevenção e tratamento
Several complications can be related to surgical approaches of the head and neckareas. Subcutaneous emphysema, pneumothorax and pneumomediastinum are described in a small number of cases, among others. In these surgeries, a careful surgical technique approach is of utmost importance, and aggressive surgical maneuvers should be avoided.Caution should be taken with the use of oxygen masks for positive pressure ventilation during anesthesia recovery and intubation. This study reports a case of pneumomediastinum, pneumothorax and subcutaneous emphysema that appeared 48 hours after palate tonsillectomy and discusses possible mechanisms, morbidity, ways of prevention and treatment
