Bone marrow transplantation for patients with Philadelphia chromosome- positive acute lymphoblastic leukemia

We report the treatment outcome of allogeneic bone marrow transplantation in ten patients with Philadelphia chromosome-positive acute lymphoblastic leukemia. Six patients are alive and well for 6 to 30 months (median 19 months) after transplantation. Four patients died with transplant related complications. In view of the poor prognosis associated with this disease, marrow ablation followed by allogeneic or syngeneic marrow grafting may be the preferred treatment modality if a suitable marrow donor is available.     

Interobserver Delineation Variation Using CT versus Combined CT + MRI in Intensity–Modulated Radiotherapy for Prostate Cancer

Purpose:  

To quantify interobserver variation of prostate and seminal vesicle delineations using CT only versus CT + MRI in consensus reading with a radiologist.     

Elevated expression and altered pattern of activity of DNA methyltransferase in liver tumors of rats fed methyl-deficient diets

DNA methyltransferase (MTase) activity in nuclear extracts from neoplastic and preneoplastic livers of rats fed a methyl-deficient diet (MDD) is elevated compared with that seen in the livers of control rats. Nuclear proteins were prepared in the presence of protease inhibitors including trans-epoxy succinyl-L-leucylamido-(4- guanido)butane and were fractionated by isoelectric focusing. In normal, control liver, two distinct MTase fractions were observed. In MDD-induced malignant liver, a third fraction, in addition to the previous two, was also seen. Both the DNA substrate and the cytosine site specificities of the third MTase fraction differ from those of the other two fractions. The distinct MTase activity in liver tumor has significantly more de novo MTase activity than do the MTase fractions of normal, control liver. Thus, normal and neoplastic rat livers differ in DNA MTase fractionation patterns and site specificities. The altered DNA MTase activity observed in rat liver tumors caused by MDDs may be one of the critical factors contributing to cancer formation through abnormal DNA methylation.      

眩晕的诊断和治疗

眩晕是由于前庭系统（几乎总是周围性）疾病引起的一种旋转幻觉，任病也方面需要与晕厥的状态、癫痫和惊恐发作相鉴别。持续≥1d的急性孤立性自发性眩晕的单次发作通常由前庭神经炎或小脑梗死所致，两者的鉴别需熟练掌握转头试验（head impulse test）。反复发作性眩晕多见丁良性阵发性位置性眩晕（BPPV）、Meniere病和偏头痛。根据可靠的痫史、位置性试验、听力图和温度试验，一股可以鉴别以上3种疾病。BPPV是最常见的反复发作性眩晕的原因，颗粒复位法通常能够使之立即治愈。后循环缺血极少会导致孤立性眩晕发作，其导致的眩晕是短暂和反复发作的，且病程较短。