Tumors and pseudotumors of foot and ankle: Bone lesions.

Bone tumors and tumor-like lesions (pseudotumors) are not uncommonly encountered as asymptomatic findings on imaging, or as symptomatic lesions clinically. Radiographic imaging is the first diagnostic tool for their management strategy, since the symptoms are commonly non-specific, such as pain, swelling, and redness. Image findings must be analyzed with attention to the specific features such as lesion location, margination, zone of transition, mineralization, size and multifocality, soft tissue component and/or loco-regional extent. Cross-sectional imaging including CT and MRI serve as complementary methods, providing additional information with respect to the lesion characterization, mineralization, extent and involvement of the adjoining soft tissues. Clinical and/or key imaging features aid in limiting the differential diagnostic possibilities and serve as a guide in determining the benignity or malignancy of the tumor as well as to exclude pseudotumors. This article reviews the key imaging features of foot and ankle lesions. Benign bone lesions include simple and aneurysmal bone cysts, lipoma, hemangioma, chondroblastoma, enchondroma, osteoid osteoma, osteoblastoma, and giant cell tumor. Locally aggressive intermediate category lesion includes hemangioendothelioma. Malignant lesions include osteosarcoma, Ewing's sarcoma, chondrosarcoma. Pseudotumors such as fibrous dysplasia, hemophilic pseudotumor, gout and Madura foot are also discussed with illustrative case examples.

"Periosteum: An imaging review".

Periosteum is a fibrous sheath, coating the external bone, except in the articular surfaces, tendon insertions and sesamoid bone surface¹. It changes its aspects and characteristics with aging, becoming progressively less elastic and more firm. It is composed of two different layers: outer fibrous (firm, collagen-filled) and inner proliferative (cambium, containing osteoprogenitor cells)². Four vascular systems are responsible for the blood supply of the periosteum: the intrinsic periosteal system, located between fibrous and proliferative layer; the periosteocortical, the main nutritional arteries of the periosteum; the musculoperiosteal, responsible for the callus formation after fractures; the fascioperiosteal, specifically for each bone.³ It is crucial to bone formation and resorption, reacting to insults in the cortical bone, such as tumors, infections, traumas, medications and arthritic diseases. The aggressiveness of the reaction can be suggested by its radiological aspect and appearance4. The periosteum in children is looser compared to adults, resulting in earlier and more exuberant reactions. All these aspects will be detailed, so the essential information all radiologists need to know will be discussed.

Achados histopatológicos de produtos de ressecção em mamaplastias redutoras / Histopathological findings in tissue specimens from reduction mammaplasties

INTRODUÇÃO: A mamoplastia redutora está entre as cinco cirurgias estéticas mais realizadas no Brasil. Não há consenso na literatura sobre a necessidade do exame de rotina dos tecidos ressecados durante o procedimento. Esse trabalho apresenta a estatística dos espécimes obtidos de mamoplastias redutoras e discute a relevância do detalhamento histopatológico dessas peças. MÉTODO: Resultados de 96 peças cirúrgicas de reduções mamárias, realizadas durante o período de 2006 a 2010, foram obtidos de uma única instituição e analisados retrospectivamente. RESULTADOS: Alterações histopatológicas foram observadas em 83,3 por cento dos espécimes. As lesões não-proliferativas benignas foram os principais achados, sendo fibrose, adenose e cistos as mais frequentes. Alterações proliferativas foram encontradas em percentual significativo das pacientes (13,54 por cento). Uma paciente (1,16 por cento), com 50 anos de idade, apresentou carcinoma lobular in situ. Pacientes na faixa etária menor que 40 anos não apresentaram lesões malignas ou pré-malignas. CONCLUSÕES: A prática rotineira de rastreamento histopatológico de peças de mamoplastias redutoras em pacientes jovens parece discutível, embora tenha sido benéfica em uma paciente com idade superior a 40 anos. Trabalhos adicionais são necessários para definir um grupo em que medidas preventivas teriam melhor relação custo-benefício.

BACKGROUND: Reduction mammaplasty ranks among the top five aesthetic surgical procedures performed in Brazil. No standard pathology assessment for reduction mammaplasty exists. This study presents the reduction mammaplasty specimens findings statistic, and a review about the real relevance of this exam. METHODS: Findings of 96 reduction mammaplasty specimens over a 5 years period at a single institution were retrospectively examined. RESULTS: Pathologic findings were present in 83.3 percent. Non proliferative benign findings are the most frequent lesions, such as fibrosis, adenosis and cists. Proliferative findings are present in 13.54 percent. A fifth years old patient (1.16 percent) presented lobular carcinoma in situ. Patients younger than 40 years old did not present maligns and pre-maligns lesions. CONCLUSIONS: Routinely practice of histopathological analysis of reduction mammaplasty in young people seems arguable. But this routine was benefit for a patient older than 40 years old. Others studies are need to define a group where preventive measures have a better cost-benefit.