RESUMEN
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Asunto(s)
Humanos , Masculino , Anciano , Colitis Isquémica , Leucocitos , RadiofármacosRESUMEN
In the presence of extraosseous activity seen in the late phase of the bone scintigraphy (BS) localized in the distal femur of patients prior to radiation synovectomy, we decided to review the frequency of this finding in 20 patients (24 joints) and its relationship with scintigraphic and clinical parameters. Mild soft tissue accumulation was seen in the late phase of the BS in 14 out of 24 joints, without association between this finding and knee uptake in vascular blood pool and late phases of the BS. However, a significant association with synovial effusion was found, and patients with higher degree of effusion presented extraosseous activity more frequently. In conclusion, we think that soft tissue accumulation in the late phase of the BS is a sign of synovial effusion.
Asunto(s)
Extravasación de Materiales Terapéuticos y Diagnósticos/diagnóstico por imagen , Articulación de la Rodilla/diagnóstico por imagen , Articulación de la Rodilla/metabolismo , Radiofármacos/farmacocinética , Líquido Sinovial , Medronato de Tecnecio Tc 99m/análogos & derivados , Medronato de Tecnecio Tc 99m/farmacocinética , Adolescente , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Cintigrafía , Estudios RetrospectivosRESUMEN
We describe a 14 year old male, diagnosed of Ewing sarcoma in left astragalus. We performed two 201-Thallium scan for evaluating the response to chemotherapy (before and after the treatment). The scan performed after chemotherapy showed patchy uptake in astragalus, calcaneus and some joints of the foot. The following radiology and scintigraphy diagnosed a reflex sympathetic dystrophy in the left foot due to disuse of the limb. The 201-Thallium overestimated viability of the tumour for this reason. We must discard the presence of this kind of associated pathology in order that they could be cause of false positives.
