RESUMO
The pattern of the focal bone lesion which consists partly or wholly of rounded holes with comparatively smooth edges is discussed. Twenty-two bone lesions were studied by angiography. The "hypervascular pattern" occurred in five cases of widely different histology, all with strong intraosseous hypervascularity. Different pathogenic mechanisms in the creation of this pattern are discussed. It is probably the result of both destructive and reparative processes in the bone.
Assuntos
Neoplasias Ósseas/irrigação sanguínea , Neoplasias Ósseas/diagnóstico por imagem , Adolescente , Adulto , Idoso , Osso e Ossos/diagnóstico por imagem , Criança , Feminino , Humanos , Linfoma Difuso de Grandes Células B/irrigação sanguínea , Linfoma Difuso de Grandes Células B/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , RadiografiaRESUMO
Prolonged injection angiography (PIA), in which large amounts of contrast material are administered for three or four seconds, was used to visualize the vasculature of 70 intracranial neoplasms. Tumor stains were demonstrated better with or solely by PIA in all pituitary adenomas with suprasellar extension and in most meningiomas. PIA was less effective in tumors with marked arteriovenous shunts or in low-grade gliomas. PIA is especially indicated when avascular or hypovascular masses are encountered on conventional angiography or when contrast enhancement is encountered on computed tomography (CT). PIA is also indicated to demonstrate neoplasms which are not enhanced with contrast media on CT since PIA demonstrates the venous anatomy surrounding the tumors especially well.
Assuntos
Neoplasias Encefálicas/diagnóstico por imagem , Angiografia Cerebral/métodos , Adenoma/irrigação sanguínea , Adenoma/diagnóstico por imagem , Neoplasias Encefálicas/irrigação sanguínea , Meios de Contraste/administração & dosagem , Craniofaringioma/irrigação sanguínea , Craniofaringioma/diagnóstico por imagem , Glioblastoma/irrigação sanguínea , Glioblastoma/diagnóstico por imagem , Glioma/irrigação sanguínea , Glioma/diagnóstico por imagem , Hemangioma/irrigação sanguínea , Hemangioma/diagnóstico por imagem , Humanos , Linfoma Difuso de Grandes Células B/irrigação sanguínea , Linfoma Difuso de Grandes Células B/diagnóstico por imagem , Meningioma/irrigação sanguínea , Meningioma/diagnóstico por imagem , Metástase Neoplásica , Pinealoma/irrigação sanguínea , Pinealoma/diagnóstico por imagem , Neoplasias Hipofisárias/irrigação sanguínea , Neoplasias Hipofisárias/diagnóstico por imagem , Tomografia Computadorizada por Raios XAssuntos
Linfoma Difuso de Grandes Células B/diagnóstico por imagem , Linfoma não Hodgkin/diagnóstico por imagem , Linfoma/diagnóstico por imagem , Neoplasias Esplênicas/diagnóstico por imagem , Diagnóstico Diferencial , Feminino , Humanos , Linfoma/irrigação sanguínea , Linfoma Difuso de Grandes Células B/irrigação sanguínea , Linfoma não Hodgkin/irrigação sanguínea , Masculino , Pessoa de Meia-Idade , Radiografia , Neoplasias Esplênicas/irrigação sanguíneaRESUMO
Pretreatment biopsy material of 82 cases of follicular lymphoma of lymph node origin was reviewed. According to the amount of small lymphocytes in the parafollicular lymphoid tissue (PSL), tumors were classified: PSL++, abundant lymphocytes with prominent postcapillary venules; PSL+, a number of lymphocytes readily recognizable, postcapillary venules present but not prominent; PSL+/-, lymphocytes barely appreciable or absent. Five-year actuarial survival rates were 82.7% in PSL++, 42.3% in PSL+, and 0% in PSL+/-. Ten-year actuarial survival rates were 51.5% and 4.7% in PSL++ and +, respectively. The PSL++ pattern was often associated with localized disease. Patients surviving more than 5 years with disseminated disease had either PSL++ or +. Survival was better correlated with PSL patterns than histologic tumor types or clinical stages. Transition of the pattern from nodular to diffuse occurred in 17 of 26 cases observed and was concomitant with the progressive loss of parafollicular (or interfollicular) components, namely small lymphocytes and lymphocyte-associated vasculature. Classification of follicular lymphoma based on parafollicular small lymphocytes (PSL) offers a new set of prognostic criteria and a guide to improved clinical management.
