RESUMO
Photodynamic therapy (PDT) is a site-specific tumor treatment involving the administration of a photosensitizer activated by the local application of light. In interstitial PDT (IPDT), multiple laser fibers are inserted into the depth of the tumor. Image guidance is essential for accurate, safe, and uniform light delivery. We report a novel technique of IPDT for advanced head and neck tumors involving an open interventional MR system. Initial results are encouraging, with minimal procedural morbidity, successful palliation of symptoms, and prolongation of expected survival time.
Assuntos
Neoplasias de Cabeça e Pescoço/patologia , Neoplasias de Cabeça e Pescoço/terapia , Terapia a Laser , Imageamento por Ressonância Magnética , Recidiva Local de Neoplasia/patologia , Recidiva Local de Neoplasia/terapia , Fotoquimioterapia , Adulto , Idoso , Terapia Combinada , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cuidados PaliativosRESUMO
Nodular fasciitis is a reactive, non-neoplastic, myofibroblastic lesion that is thought to be a response of tissue to injury. Microscopically it mimics sarcoma, so accurate diagnosis is important to avoid over treatment. It has been reported at all anatomical sites, but is most common in the upper extremities. We present a rare case of nodular fasciitis of the soft tissues of the cheek.
Assuntos
Fasciite/patologia , Doenças da Boca/patologia , Mucosa Bucal/patologia , Adulto , Feminino , HumanosRESUMO
PURPOSE: The aims of the study were to assess the degree of accuracy of model surgery performed manually using the Eastman technique and to compare it with model surgery performed with the aid of a robot arm. PATIENTS AND METHODS: Twenty-one patients undergoing orthognathic surgery gave consent for this study. They were divided into 2 groups based on the model surgery technique used. Group A (52%) had model surgery performed manually, whereas group B (48%) had their model surgery performed using the robot arm. Patients' maxillary casts were measured before and after model surgery, and results were compared with those for the original treatment plan in horizontal (x-axis), vertical (y-axis), and transverse (z-axis) planes. RESULTS: Statistical analysis using Mann-Whitney U test for x- and y-axis and independent sample t test for z-axis have shown significant differences between both groups in x-axis (P =.024) and y-axis (P =.01) but not in z-axis (P =.776). CONCLUSIONS: Model surgery performed with the aid of a robot arm is significantly more accurate in anteroposterior and vertical planes than is manual model surgery. Robot arm has an important role to play in orthognathic surgery planning and in determining the biometrics of orthognathic surgical change at the model surgery stage.