RESUMO
OBJECTIVES: The purpose of this study was to evaluate the utility of positron emission tomography with F18-fluorodeoxyglucose in the preoperative evaluation and staging of malignant mesothelioma in patients who were candidates for aggressive combined modality therapy. METHODS: Eighteen consecutive patients with biopsy-proven malignant mesothelioma underwent positron emission tomographic scanning. The results of positron emission tomographic imaging were compared with results obtained by computed tomography, mediastinoscopy, thoracoscopy, and pathologic examination of surgical specimens. All patients fasted and received an average of 14.5 +/- 2.7 mCi of F18-fluorodeoxyglucose for positron emission tomographic scanning. Attenuation-corrected whole-body and regional emission images of the chest and upper abdomen were acquired and formatted into transaxial, coronal, and sagittal images. RESULTS: All primary malignant mesotheliomas accumulated F18-fluorodeoxyglucose, and the mean standardized uptake value was 7. 6 (range, 3.33-14.85; n = 9). There were no false-negative results of positron emission tomography. Identification of occult extrathoracic metastases by positron emission tomography was the basis for excluding two patients from surgical therapy. There were two false-positive results of positron emission tomography: increased F18-fluorodeoxyglucose uptake in the contralateral chest that was negative by thoracoscopic biopsy (n = 1) and increased abdominal F18-fluorodeoxyglucose uptake after partial colectomy for diverticular disease (n = 1). CONCLUSIONS: Positron emission tomography can identify malignant pleural mesothelioma and appears to be a useful noninvasive staging modality for patients being considered for aggressive combined modality therapy.
Assuntos
Fluordesoxiglucose F18 , Mesotelioma/diagnóstico por imagem , Mesotelioma/patologia , Neoplasias Pleurais/diagnóstico por imagem , Neoplasias Pleurais/patologia , Compostos Radiofarmacêuticos , Tomografia Computadorizada de Emissão , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Cuidados Pré-Operatórios , Reprodutibilidade dos TestesRESUMO
Solitary fibrous tumors of the pleura are rare. Approximately 600 cases have been described in the literature. We report a case of a young man with a giant solitary fibrous tumor of the pleura that filled his entire left hemithorax and anterior mediastinum and extended into the right side of his chest. The diagnostic modalities employed, the operation, and the postoperative management resulting in complete resection of the tumor and full lung reexpansion are described.
Assuntos
Mesotelioma/diagnóstico , Neoplasias Pleurais/diagnóstico , Adulto , Obstrução das Vias Respiratórias/diagnóstico , Biópsia , Broncoscopia , Embolização Terapêutica , Humanos , Imageamento por Ressonância Magnética , Masculino , Mediastino/patologia , Mesotelioma/patologia , Mesotelioma/cirurgia , Mesotelioma/terapia , Neoplasias Pleurais/patologia , Neoplasias Pleurais/cirurgia , Neoplasias Pleurais/terapia , Atelectasia Pulmonar/terapia , Toracotomia , Tórax/patologiaRESUMO
Giant tumors of the chest are rare. These tumors comprise a spectrum of disease from benign lesions to highly aggressive malignant tumors with cells of origin in the pleura, pulmonary parenchyma, blood vessels, thymus, and connective tissues. We report four cases of giant tumors of the thorax treated with preoperative arterial embolization followed by complete surgical resection. Their diagnostic and treatment courses, imaging, and pathology are described.