RESUMO
We report a case of tarsal tunnel syndrome (TTS) with focal conduction block across the tarsal tunnel (TT). A 46-year-old woman had pain in the left foot, sensory loss on the plantar surface, and positive Tinel sign over the TT. TTS was confirmed by magnetic resonance imaging (MRI) scan and surgery. Motor nerve conduction studies showed focal conduction block across the TT. Conduction block has rarely been reported in TTS. In this case, conduction block provides evidence for focal demyelination as the primary pathological process in TTS.
Assuntos
Condução Nervosa/fisiologia , Síndrome do Túnel do Tarso/fisiopatologia , Tornozelo/inervação , Tornozelo/patologia , Descompressão Cirúrgica , Doenças Desmielinizantes/etiologia , Doenças Desmielinizantes/patologia , Feminino , Pé/inervação , Pé/patologia , Humanos , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Neurônios Motores/fisiologia , Procedimentos Neurocirúrgicos , Dor/etiologia , Síndrome do Túnel do Tarso/patologia , Síndrome do Túnel do Tarso/cirurgia , Nervo Tibial/cirurgiaRESUMO
BACKGROUND: Chagas' disease is an endemic tropical affliction found from southern United States to Argentina. The acute phase of this disease is difficult to study in man because the symptoms are non-specific and most cases require no medical assistance. Experimental models have been developed for sequential studies, and intense parasitism in all organs and tissues, including the pancreas, have been detected in the acute phase. PURPOSE: To evaluate the involvement of the pancreas in acute experimental Chagas' disease in a mouse model by histopathological characterization. CASUISTIC AND METHODS: Ten BALBc mice, about 20 g, injected i.p. with 100 000 forms of the Y strain of Trypanosoma cruzi were used. The animals were sacrificed after 14 days of infection. Fragments of pancreas were processed by conventional paraffin embedding and hematoxylin-eosin staining. RESULTS: Ruptured pseudocysts and release of parasites to the extracellular medium caused by necrosis of acinar and duct cells and foci of fat were the most striking histopathological features of acute Chagasic pancreatitis. CONCLUSION: Parasitism is the main cause of acute pancreatitis in Chagas' disease.
Assuntos
Doença de Chagas/complicações , Pâncreas/parasitologia , Pancreatite/parasitologia , Doença Aguda , Animais , Doença de Chagas/patologia , Modelos Animais de Doenças , Camundongos , Camundongos Endogâmicos BALB C , Pâncreas/patologia , Pancreatite/patologiaRESUMO
BACKGROUND: Chagas' disease is an endemic tropical affliction found from southern United States to Argentina. The acute phase of this disease is difficult to study in man because the symptoms are non-specific and most cases require no medical assistance. Experimental models have been developed for sequential studies, and intense parasitism in all organs and tissues, including the pancreas, have been detected in the acute phase. PURPOSE: To evaluate the involvement of the pancreas in acute experimental Chagas' disease in a mouse model by histopathological characterization. CASUISTIC AND METHODS: Ten BALBc mice, about 20 g, injected i.p. with 100 000 forms of the Y strain of Trypanosoma cruzi were used. The animals were sacrificed after 14 days of infection. Fragments of pancreas were processed by conventional paraffin embedding and hematoxylin-eosin staining. RESULTS: Ruptured pseudocysts and release of parasites to the extracellular medium caused by necrosis of acinar and duct cells and foci of fat were the most striking histopathological features of acute Chagasic pancreatitis. CONCLUSION: Parasitism is the main cause of acute pancreatitis in Chagas' disease
Assuntos
Animais , Camundongos , Doença de Chagas , Pâncreas , Pancreatite , Doença Aguda , Doença de Chagas , Modelos Animais de Doenças , Camundongos Endogâmicos BALB C , Pâncreas , PancreatiteRESUMO
Os mega-orgaos na Doenca de Chagas sao bem conhecidos, especialmente os desenvolvidos no sistema digestivo. A infeccao aguda apresenta parasitismo de diversas celulas, tecidos e orgaos, dentre eles a bexiga urinaria. Camundongos Balb/c infectados com 100.000 formas sanguineas de cepa Y de T. cruzi mostraram intenso parasitismo de todas camadas da bexiga urinaria na fase aguda. Os parasitas foram encontrados na mucosa, submucosa, lamina propria, muscular, adventicia e tecido adiposo, alem das celulas descamadas para a luz do orgao...
