RESUMO
Primary renal angiosarcomas (AS) are uncommon tumors with poor prognosis. Aetiology is unknown but some unproven risk factors have been described. It is difficult to discriminate these masses from renal cell carcinomas or other renal masses with imaging modalities. Immunohistochemistry plays an important role in the diagnosis. Main treatment protocol for primary renal AS is still controversial and nephrectomy with chemotherapy and/or radiotherapy seems the only treatment option. We state a primary renal angiosarcoma case for its rareness and contribution to literature.
Assuntos
Carcinoma de Células Renais/diagnóstico por imagem , Hemangiossarcoma/diagnóstico por imagem , Neoplasias Renais/diagnóstico por imagem , Rim/patologia , Idoso , Antineoplásicos/uso terapêutico , Carcinoma de Células Renais/tratamento farmacológico , Diagnóstico Diferencial , Evolução Fatal , Hemangiossarcoma/tratamento farmacológico , Humanos , Imuno-Histoquímica , Neoplasias Renais/tratamento farmacológico , Masculino , Insuficiência de Múltiplos Órgãos , Nefrectomia , Prognóstico , Tomografia Computadorizada por Raios X , UltrassonografiaRESUMO
We investigated the effects of ethyl pyruvate (EP) on oxidative and endoplasmic reticulum (ER) stress due to experimental testicular ischemia-reperfusion (I-R). Eighteen rats were divided into a control group, a torsion-detorsion (T-D) group and an EP group. For pretreatment of the EP group, 50 mg/kg EP was given intraperitoneally (i.p.) 30 min before detorsion. Tissue 4-hydroxynonenal (4-HNE) and 78-kDa glucose-regulated protein (GRP78) levels were determined using enzyme-linked immunosorbent assay (ELISA) kits. Tissue total oxidant status (TOS) and total antioxidant status were determined using colorimetric methods. Histology of the tissues was evaluated using hematoxylin and eosin staining. In the T-D group, tissue 4-HNE, GRP78, TOS and oxidative stress index levels were significantly higher than for the control group. The increases were reduced significantly by EP pretreatment. Our findings suggest that EP can inhibit I-R induced testicular injury by suppressing oxidative and ER stress. EP may be a useful adjunctive treatment for surgical repair in humans.