-Medulloblastoma is a brain tumor of neuroepithelial origin, which represents 15 to 30% of all pediatric brain tumors, and less than 1% of CNS adult neoplasms. We report the imaging findings of 8 adult patients with medulloblastoma. The mean age was 35 years, ranging from 20 to 65 years, and the male:female rate was 3:5. The tumors were predominantly lateral (63%), hyperdense on CT scans (83%), and on the MRI, hypointense on T1 (100%) and hyperintense on T2 (80%) weighted images. It was seen intratumoral necrosis and cysts in six cases and calcifications in three. Hydrocephalus was observed in 5 cases and brain stem invasion in four. The imaging findings of medulloblastomas in adults are different of those in child, and also nonspecific. Although these tumors are uncommon in adults, they must be considered in the differential diagnosis of cerebellar masses in the posterior fossa of this age group.KEY WORDS: medulloblastoma, adults, computed tomography, magnetic resonance imaging.Meduloblastoma cerebelar em adultos: achados de TC e RM em oito casos Meduloblastoma cerebelar em adultos: achados de TC e RM em oito casos Meduloblastoma cerebelar em adultos: achados de TC e RM em oito casos Meduloblastoma cerebelar em adultos: achados de TC e RM em oito casos Meduloblastoma cerebelar em adultos: achados de TC e RM em oito casos RESUMO -O meduloblastoma é um tumor de origem neuroepitelial, que representa entre 15 e 30% dos tumores cerebrais em crianças e menos de 1% das neoplasias intracranianas em adultos. Apresentamos os achados de imagem de 8 pacientes adultos com meduloblastoma. A média de idade foi 35 anos, variando entre 20 e 65 anos, e a relação homem:mulher foi 3:5. Os tumores foram predominantemente laterais (63%), hiperdensos na tomografia computadorizada (83%), e, na ressonância magnética, hipointensos nas imagens ponderadas em T1 (100%) e hiperintensos nas ponderadas em T2 (80%). Necrose e cistos intratumorais foram observados em seis casos e calcificações em três. Cinco pacientes apresentavam hidrocefalia e quatro tinham invasão neoplásica do tronco cerebral. Os achados de imagem dos meduloblastomas em adultos são inespecíficos e diferentes daqueles que acometem crianças. Apesar destes tumores serem incomuns em adultos, eles devem sem considerados no diagnóstico diferencial de massas cerebelares na fossa posterior de pacientes neste grupo etário.
Os styloideum is an accessory ossicle located dorsally on the wrist that represents an anatomic variant. Association between the os styloideum and wrist pain is clinically known as "carpal boss syndrome". The authors report a case of bone marrow edema in the os styloideum diagnosed by magnetic resonance imaging in a young tennis player, and present a literature review on this finding. Keywords: Os styloideum; Bone marrow edema; Magnetic resonance imaging.Os styloideum é um ossículo acessório, imóvel, localizado dorsalmente no carpo, que representa uma variante anatômica. A associação entre os styloideum e dor no punho é conhecida clinicamente como "carpal boss syndrome". Os autores relatam um caso de os styloideum com edema ósseo trabecular no estudo por ressonância magnética em atleta jovem tenista, com revisão da literatura deste achado. Unitermos: Os styloideum; Edema ósseo trabecular; Imagem por ressonância magnética. AbstractResumo
citation: gomes af, paganella Vc, zapparoli m, zanoni eK, Lucaski ff, aguiar r. simultaneous "bucket-handle" tear of both menisci on the same knee. acta ortop bras.
Objectives To evaluate the tomographic distance between the sternoclavicular joints and the nearest hilar structures.Methods Computed tomography images (axial and sagittal slices) in 120 healthy individuals (60 men and 60 women) between 18 and 60 years old were prospectively analyzed. The distances from both sternoclavicular joints to the respective brachiocephalic veins, trachea, esophagus, and lung apexes were measured and related to age, sex, and body mass index.Results Statistically significant differences were found in the distance from the right and left sternoclavicular joint distances and the corresponding brachiocephalic vein, esophagus, and lung apexes. In women, both sides were closer to the noble structures. In patients with body mass index <25, the distances were significantly less than in heavier patients.Conclusion The left sternoclavicular joint is closer to the hilar structures than the contralateral side. In women, both sternoclavicular joints are closer to the brachiocephalic veins, esophagus, and lung apexes than in men. Patients with body mass index <25 have shorter distances between these joints and the brachiocephalic veins and esophagus. Level of Evidence II; Prognostic studies – Investigating the effect of a patient characteristic on the outcome of disease.
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