Résumé
BACKGROUND: Mitotic arrest deficiency protein 2 (MAD2) is a key component of spindle assembly checkpoint function, which mediates cell apoptosis through microtubule kinetics. Aberrant expression of MAD2 is believed to be associated with the development of chromosome instability. MAD2 also has a signihicant role in cellular drug resistance to taxane chemotherapeutic agents. METHODS: Expression of MAD2 and p53 was investigated using immunohistochemistry in 85 cases of ovarian carcinomas. Clinicopathological data including progression-free survival were analyzed. RESULTS: A significant (p=.035) association was observed between the grade of serous carcinoma and the expression level of MAD2. While low-grade serous carcinoma showed a low-level expression of MAD2, high-grade serous carcinoma showed a high-level expression of MAD2. We also determined that low-level expression of MAD2 was associated with reduced progression-free survival (PFS) (p=.016) in high-grade serous carcinoma. CONCLUSIONS: MAD2 expression in ovarian carcinoma is related to the grade of serous carcinoma and PFS of high-grade serous carcinoma. Expression level of MAD2 detected by immunohistochemistry may serve as an indicator in predicting the response of microtubule-interfering chemotherapeutic agents.
Sujets)
Apoptose , Composés pontés , Protéines de liaison au calcium , Points de contrôle du cycle cellulaire , Protéines du cycle cellulaire , Instabilité des chromosomes , Survie sans rechute , Résistance aux substances , Immunohistochimie , Cinétique , Points de contrôle de la phase M du cycle cellulaire , Microtubules , Tumeurs de l'ovaire , Protéines de répression , TaxoïdesRésumé
A previously healthy, 16-month-old boy was admitted to hospital due to fever, vomiting, and persistent gross hematuria for 2 weeks. His imaging studies showed an inhomogeneous mass, in a left dilated renal pelvis and proximal ureter, which was suggestive of a kidney neoplasm. A stage I Wilms tumor limited to the nephrectomised kidney was diagnosed by histology. The margin of ureter and renal vessels were clear. There was no evidence of anaplasia, angiolymphatic invasion, or skeletal muscle differentiation. In addition, there were polypoid protrusions of tumor into the pelvicaliceal system, resulting in such a 'botryoid' appearance. The patient had been treated with adjuvant chemotherapy using 7 cycles of intravenous actinomycin-D and vincristine (NWTS regimen EE4A) for 5 months. During a 22-month follow-up period, there has been no evidence of tumor recurrence.
Sujets)
Humains , Nourrisson , Anaplasie , Traitement médicamenteux adjuvant , Fièvre , Études de suivi , Hématurie , Rein , Tumeurs du rein , Pelvis rénal , Muscles squelettiques , Récidive , Uretère , Vincristine , Vomissement , Tumeur de WilmsRésumé
A previously healthy, 16-month-old boy was admitted to hospital due to fever, vomiting, and persistent gross hematuria for 2 weeks. His imaging studies showed an inhomogeneous mass, in a left dilated renal pelvis and proximal ureter, which was suggestive of a kidney neoplasm. A stage I Wilms tumor limited to the nephrectomised kidney was diagnosed by histology. The margin of ureter and renal vessels were clear. There was no evidence of anaplasia, angiolymphatic invasion, or skeletal muscle differentiation. In addition, there were polypoid protrusions of tumor into the pelvicaliceal system, resulting in such a 'botryoid' appearance. The patient had been treated with adjuvant chemotherapy using 7 cycles of intravenous actinomycin-D and vincristine (NWTS regimen EE4A) for 5 months. During a 22-month follow-up period, there has been no evidence of tumor recurrence.
Sujets)
Humains , Nourrisson , Anaplasie , Traitement médicamenteux adjuvant , Fièvre , Études de suivi , Hématurie , Rein , Tumeurs du rein , Pelvis rénal , Muscles squelettiques , Récidive , Uretère , Vincristine , Vomissement , Tumeur de WilmsRésumé
Congenital pulmonary lymphangiectasia (CPL) is very rare. It shows diffuse pulmonary lymphatic dilatation without lymphatic proliferation. CPL can occur as a primary disorder or arise secondarily from other diseases such as the obstruction of pulmonary veins or lymphatics. The prognosis of CPL is very poor. Approximately 50% of infants are stillborn and most others usually die within the first day of life. The present case showed diffuse lymphangiectasia in the subpleural, interlobular, and peribronchovascular areas. The flat lining cells were immunohistochemically positive for D2-40 and CD31. CPL is usually diagnosed by clinicoradiological or postmortem examinations. However, our case was diagnosed by an antemortem lung biopsy. We report a case of CPL with total anomalous pulmonary venous return.