RESUMO
<p><b>OBJECTIVE</b>To study the effect of Ar(+) laser on human vas deferens and to compare the effects of using different radiation levels with varying thickness of tissue and varying levels of injury.</p><p><b>METHODS</b>After initial tests on animals, four human scrotums were opened and treated directly with Ar(+) laser radiation. Then 58 human individual scrotums were treated with radiation by the method of trans-skin puncture. The rate of sperm reduction and elimination was tested.</p><p><b>RESULTS</b>In 60 cases, the sperms were found to be eliminated completely after six months of radiation treatment. In 2 cases the sperms were found not to be eliminated completely due to the insufficient radiation.</p><p><b>CONCLUSION</b>Ar(+) laser is one of the best forms of radiation for coagulation of vas deferens. It can be used to coagulate vas deferens without any complications or sequelae.</p>
Assuntos
Adulto , Humanos , Masculino , Seguimentos , Fotocoagulação a Laser , Esterilização Reprodutiva , Métodos , Ducto Deferente , Cirurgia GeralRESUMO
<p><b>OBJECTIVE</b>To investigate the significance of detecting chimeric mRNA resulting from t(X;17)(p11.2;q25) in paraffin-embedded tumor tissues of alveolar soft part sarcoma (ASPS).</p><p><b>METHODS</b>Formalin-fixed, paraffin-embedded tumor tissues from 8 cases of alveolar soft part sarcoma and 15 cases of controls (including 6 alveolar rhabdomyosarcomas, 6 renal cell carcinomas, 2 paragangliomas and 1 granular cell myoblastoma) were retrieved from the archival materials. ASPL-TFE3 fusion transcripts were analyzed in all samples by reverse transcriptase-polymerase chain reaction (RT-PCR). The quality of the mRNA was assessed using the house-keeping gene beta-actin.</p><p><b>RESULTS</b>ASPL-TFE3 fusion transcripts were detected in 6 of the 8 ASPS cases (4 being type 2 and 2 being type 1). The remaining 2 cases were negative for both beta-actin and ASPL-TFE3. No ASPL-TFE3 mRNA expression was detected in all the controls. PAX3/7-FKHR fusion transcripts were also detected in 4 of the 6 alveolar rhabdomyosarcoma samples.</p><p><b>CONCLUSIONS</b>The expression of ASPL-TFE3 fusion transcripts in paraffin-embedded tumor tissues can serve as an useful molecular marker in the diagnosis of ASPS. It may also be helpful in elucidating the underlying pathogenesis of ASPS in subsequent retrospective studies.</p>
Assuntos
Adolescente , Adulto , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Fatores de Transcrição de Zíper de Leucina e Hélice-Alça-Hélix Básicos , Genética , Cromossomos Humanos Par 17 , Genética , Cromossomos Humanos X , Perna (Membro) , Proteínas de Neoplasias , Genética , Fusão Oncogênica , Proteínas de Fusão Oncogênica , Genética , Órbita , Inclusão em Parafina , RNA Mensageiro , Genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Sarcoma Alveolar de Partes Moles , Genética , Metabolismo , Patologia , Neoplasias de Tecidos Moles , Genética , Metabolismo , Patologia , Translocação GenéticaRESUMO
<p><b>OBJECTIVE</b>To detect the COL1A1/PDGFB fusion transcripts and discuss its clinicopathological significance in dermatofibroscoma protuberans.</p><p><b>METHODS</b>Formalin fixed, paraffin-embedded tumor specimens from 12 patients with DFSP were reviewed by light microscope and the expression of COL1A1/PDGFB mRNA resulting from the reciprocal translocation t(17;22) (q22;q13.1) was detected by one-step revers transcriptase-polymerase chain reaction. The following tumor specimens were included as controls: 2 fibrosarcoma, 2 malignant fibrous histocytoma, 3 leiomyosarcoma, 1 dermarofibroma and 1 nerve shealth tumor.</p><p><b>RESULTS</b>The COL1A1/PDGFB fusion transcripts were detected in 8 (67%) of 12 samples from patients with DFSP. Nucleotide sequence analysis using the PCR products confirmed that different regions of the COL1A1 gene, respectively, were fused with of PDGFB gene. No COL1A1/PDGFB fusion transcripts were detected in the control tumors.</p><p><b>CONCLUSION</b>Detection of specific COL1A1/PDGFB fusion transcripts in DFSP will help to diagnose the nature of DFSP and research the mechanism of its molecular histogenesis.</p>
Assuntos
Adolescente , Adulto , Idoso , Criança , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Colágeno Tipo I , Genética , Dermatofibrossarcoma , Genética , Genes sis , Inclusão em Parafina , RNA Mensageiro , Proteínas Recombinantes de Fusão , Genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Métodos , Neoplasias Cutâneas , GenéticaRESUMO
<p><b>OBJECTIVE</b>To detect over-expression of AChR-gamma mRNA in rhabdomyosarcoma tissues by duplex RT-PCR and discuss its potential in diagnosis of rhabdomyosarcoma.</p><p><b>METHODS</b>Duplex RT-PCR was applied to the simultaneous detection of AChR-alpha and gamma subunit messenger RNA in 17 cases of rhabdomyosarcoma (9 ERMS, 6 ARMS, 2 PRMS). 20 cases of non-rhabdomyosarcomous small round cell tumors (6 poorly differentiated synovial sarcomas, 6 ES/PNET, 6 lymphomas, 2 neuroblastomas) and three normal muscle samples were also detected for AChR-alpha and gamma mRNA by the same method.</p><p><b>RESULTS</b>AChR-alpha and AChR-gamma mRNA were expressed in all the cases of rhabdomyosarcoma. The rate of quantity in both transcripts was AChR-gamma/AChR-alpha >or= 1, but the rate for three normal muscle samples was < 1. Cases of non-rhabdomyosarcomous small round cell tumors were all negative for AChR-gamma.</p><p><b>CONCLUSION</b>AChR-gamma mRNA expression detected by molecular genetic methods is useful in diagnosis and differential diagnosis of rhabdomyosarcoma.</p>