RESUMO
Background: Accuracy of intraoperative frozen section diagnosis is an important part of quality control in surgical pathology. In this study we try to evaluate the frozen section diagnosis in our center, a referral center in southern Iran. Materials and Methods: During the four-year-period of study, all the frozen sections in the affiliated hospitals of Shiraz University of Medical Sciences were evaluated. Discrepant cases were studied to find out reasons for their inaccuracies. Results: In the four years, 759 frozen sections have been done, 25 of which showed discordant results. The most common site of frozen section and discrepancy was in central nervous system tumors. The reason for inaccuracy in frozen section diagnosis in 52% of cases was proved to be interpretative, 44% sampling error and the remainder due to lack of clinical information of the pathologist. Conclusion: Accuracy of our intraoperative consultation is comparable with other centers in Western countries. Most of the discrepancies can be prevented by providing more clinical information for the pathologist and more accurate sampling.
RESUMO
CONTEXTO: Hemangiopericitoma é uma neoplasia mensequimal incomum que raramente afeta o canal espinhal. O hemangiopericitoma maligno primário da coluna vertebral é extremamente raro. RELATO DE CASO: Relatamos um caso de hemangiopericitoma maligno epidural primário da coluna vertebral torácica que invade o osso vertebral, causando a compressão do cordão espinhal em um homem de 21 anos. O paciente apresentou-se com dor progressiva nas costas durante quatro meses, que progrediu para paraparesia, parestesia bilateral do pé e incontinência urinária. A intervenção cirúrgica com laminectomia e ressecção do tumor e fixação posterior foi executada. A radioterapia pós-operatória no campo envolvido foi realizada. Marcante melhoria neurológica foi observada subseqüentemente. Descrevemos as características clínicas, radiológicas, e histológicas deste tumor e revemos a literatura.