Melanoma de escroto en un paciente de mediana edad / Scrotum melanoma in a middle-age patient

Se describe el caso clínico de un paciente de 42 años de edad, de piel negra, que asistió a la consulta de Cirugía de Tumores Periféricos en el Hospital Oncológico Docente Provincial Conrado Benítez García de Santiago de Cuba, por presentar una lesión oscura hiperpigmentada en el lado izquierdo del escroto, próxima a la región del rafe, de aproximadamente 4 mm y bordes irregulares, que no elevaba la piel ni dolía. Se realizó exéresis de la lesión y el estudio histopatológico reveló la existencia de un melanoma, sin ulceración ni satelitosis, con crecimiento radial, por lo que se profundizó en el área operada en busca de márgenes sin afectación y se resecaron los ganglios linfáticos inguinales bilaterales de manera profiláctica. Luego se indicó quimioterapia e inyecciones de interferón. El paciente mantenía una evolución favorable hasta el año y medio después de operado.

The case report of a 42 years, black skin patient is described, he attended the Peripheral Tumors Surgery Service in Conrado Benítez García Teaching Provincial Cancer Hospital in Santiago de Cuba, due to a hyperpigmented dark lesion in the left side of the scrotum, next to the raphe region, of approximately 4 mm and irregular borders that didn't elevate the skin or hurted. An excision of the lesion was carried out and the histological and pathological study revealed the existence of a melanoma, without ulceration or satelitosis, with radial growth, reason why there was a deep examination of the operated area in search of margins without affectation and the bilateral groin lymph nodes were dried up in a prophylactic way. Then chemotherapy and interferon injections were indicated. The patient maintained a favorable clinical course until a year and a half after the surgery.

Shaping ability of Pathfile and WaveOne in simulated root canals / 口腔疾病防治

Objective @# This study aims to evaluate the shaping capability of Pathfile and WaveOne in simulated root canals. @*Methods@#A total of 20 simulated resin blocks were divided randomly into two groups, group W prepared with WaveOne alone. Group PW prepared with WaveOne and Pathfile. Preparation time and number of separated instruments were measured respectively. Pre-and post-operative images were obtained with a scanner and superimposed through Photoshop and ImageJ2X. The changes in canal bending curvature and material removal from the inner and outer canal walls at 10 points beginning at 1mm from the end point of the canal were measured with ImageJ2X. Centering capability was determined accordingly by comparing and analyzing the material removal from the inner and outer canal walls.@*Results @# Two groups have no occurrence of instrument separation, no statics significance in root canal preparation and the changes of root canal working length differences (P > 0.05). But at position of root canal point 4 to 5 mm, the misalignment of group W were 0.085 ± 0.05 mm and -0.312 ± 0.068 mm, the misalignment of group PW were -0.071 ± 0.042 mm, -0.26 ± 0.103 mm (P < 0.05).@*Conclusion@#Conclusion