RESUMO
Detection of microcalcifications is important in detecting early breast cancer. We present a case of screening mammogram in which calamine lotion mimics intramammary calcifications.
Assuntos
Artefatos , Doenças Mamárias/diagnóstico por imagem , Calcinose/diagnóstico , Compostos Férricos , Glândulas Mamárias Humanas , Mamografia/métodos , Fenóis , Óxido de Zinco , Adulto , Diagnóstico Diferencial , Combinação de Medicamentos , Reações Falso-Positivas , Feminino , Humanos , Aumento da Imagem/métodos , Compostos de ZincoRESUMO
We describe the treatment of an uncommonly late presentation of a recurrent parosteal osteosarcoma of the distal femur. The osteosarcoma had originally been detected 20 years earlier, and had been treated with wide excision and mega-prosthesis to reconstruct the femur. The tumour recurred in close proximity to the femur prosthesis and encased half the femoral stem. Because there was a large piece of metal at the site of recurrence, which might have interfered with computed tomography and magnetic resonance imaging, ultrasonography was used to locate the lesion. The tumour was successfully treated with wide local re-excision. This case emphasises the importance of the long-term follow-up of patients with parosteal osteosarcoma.
Assuntos
Neoplasias Femorais/patologia , Neoplasias Femorais/cirurgia , Osteossarcoma/patologia , Osteossarcoma/cirurgia , Próteses e Implantes , Adulto , Feminino , Neoplasias Femorais/diagnóstico por imagem , Humanos , Recidiva Local de Neoplasia , Osteossarcoma/diagnóstico por imagem , RadiografiaRESUMO
The development of rapid prototyping has evolved from crude milled models to laser polymerized stereolithographic models of excellent accuracy. The technology was advanced further with the recent introduction of fused deposition modelling and a three-dimensional ink-jet printing technique in stereo-model fabrication. The concept of using a three-dimensional model in planning the operation has amazed maxillofacial surgeons since its first application in grafting a skull defect in 1995. It was followed by many bright ideas for applications in the field of facial reconstructive surgery. Stereo-models may assist in diagnosis of facial fractures, joint ankylosis and even impacted teeth. The surgery can be simulated prior the operation of complex craniofacial syndromes, facial asymmetry and distraction osteogenesis. The stereo-model can be used for preparation of reconstructive plate or joint prostheses. It is of enormous value for educational teaching and as a patient information tool when obtaining the consent for surgery.
