RESUMEN
The posterolateral corner (PLC) of the knee is a complex anatomical-functional unit that includes ligamentous and tendinous structures that are crucial for joint stability. This review discusses the intricate anatomy, biomechanics, and imaging modalities, as well as the current challenges in diagnosing PLC injuries, with an emphasis on magnetic resonance imaging (MRI). Recognizing the normal MRI anatomy is critical in identifying abnormalities and guiding effective treatment strategies. Identification of the smaller structures of the PLC, traditionally difficult to depict on imaging, may not be necessary to diagnose a clinically significant PLC injury. Injuries to the PLC, often associated with cruciate ligament tears, should be promptly identified because failure to recognize them may result in persistent instability, secondary osteoarthritis, and cruciate graft failure.
Asunto(s)
Traumatismos de la Rodilla , Articulación de la Rodilla , Imagen por Resonancia Magnética , Humanos , Articulación de la Rodilla/diagnóstico por imagen , Traumatismos de la Rodilla/diagnóstico por imagen , Imagen por Resonancia Magnética/métodos , Fenómenos Biomecánicos , Ligamentos Articulares/diagnóstico por imagen , Ligamentos Articulares/lesiones , Inestabilidad de la Articulación/diagnóstico por imagenRESUMEN
We present the case of an 80 year old woman with hip pain, caused by a longitudinal femoral insufficiency stress fracture, depicted with radiographs, CT and MR. This type of fracture is very rare, with only a few cases reported. We conducted a literature review and compared the findings with the present case.
RESUMEN
Erdheim-Chester disease is an infiltrative form of histiocytosis characterized by replacement of normal tissues by lipid-laden histiocytes. The disease typically infiltrates the medullary portion of the diaphysis and metaphysis of long bones, producing a characteristic radiological pattern dominated by bone sclerosis. It usually affects adults of 40 years of age with a clinical spectrum ranging from an asymptomatic focal bone lesion to multisystemic disease. This case report documents unique imaging and pathologic findings of Erdheim-Chester disease using close postmortem pathologic-imaging correlation.