RESUMO
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Assuntos
Humanos , Masculino , Idoso , Colite Isquêmica , Leucócitos , Compostos RadiofarmacêuticosRESUMO
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.
Assuntos
Extravasamento de Materiais Terapêuticos e Diagnósticos/diagnóstico por imagem , Articulação do Joelho/diagnóstico por imagem , Articulação do Joelho/metabolismo , Compostos Radiofarmacêuticos/farmacocinética , Líquido Sinovial , Medronato de Tecnécio Tc 99m/análogos & derivados , Medronato de Tecnécio Tc 99m/farmacocinética , Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cintilografia , Estudos RetrospectivosRESUMO
Five cases of patients with gynecological neoplasm (four cervix carcinoma and one endometrial sarcoma) who underwent pelvic external radiotherapy and intracavitary brachytherapy in whom pathologic pelvic uptake was found in the bone scan are presented. The diagnosis was pelvic insufficiency fractures due to radiotherapy adverse effects on the skeletal system confirmed by CT and by the favorable scintigraphy and clinical outcome. Both bone metastases and insufficiency fractures must be considered in the differential diagnosis of bone pain in irradiated pelvises. The bone scintigraphy detects these insufficiency fractures early and can show a typical symmetric uptake pattern. In asymmetric lesions, the CT and clinical follow-up as well as the scintigraphic evolution of the lesions should confirm the findings of the bone scintigraphies.
Assuntos
Neoplasias Ósseas/secundário , Braquiterapia/efeitos adversos , Carcinoma de Células Escamosas/secundário , Carcinoma/secundário , Neoplasias do Endométrio/radioterapia , Fraturas Espontâneas/diagnóstico por imagem , Ossos Pélvicos/diagnóstico por imagem , Lesões por Radiação/diagnóstico por imagem , Teleterapia por Radioisótopo/efeitos adversos , Sacro/diagnóstico por imagem , Fraturas da Coluna Vertebral/diagnóstico por imagem , Neoplasias do Colo do Útero/radioterapia , Idoso , Neoplasias Ósseas/diagnóstico por imagem , Reabsorção Óssea/etiologia , Carcinoma/diagnóstico por imagem , Carcinoma/radioterapia , Carcinoma de Células Escamosas/diagnóstico por imagem , Carcinoma de Células Escamosas/radioterapia , Diagnóstico Diferencial , Feminino , Fraturas Espontâneas/etiologia , Humanos , Pessoa de Meia-Idade , Osteoblastos/efeitos da radiação , Ossos Pélvicos/patologia , Ossos Pélvicos/efeitos da radiação , Lesões por Radiação/etiologia , Cintilografia , Sacro/patologia , Sacro/efeitos da radiação , Fraturas da Coluna Vertebral/etiologiaRESUMO
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.
