Actuarial Overall Survival Rates Research Articles

Comparison of d,l -Sotalol and Implantable Defibrillators for Treatment of Sustained Ventricular Tachycardia or Fibrillation in Patients With Coronary Artery Disease

Implantable cardioverter-defibrillators (ICDs) and d,l-sotalol are widely used to treat ventricular tachyarrhythmia and ventricular fibrillation (VT/VF). The purpose of this study was to compare the long-term efficacy of d,l-sotalol and ICDs in patients with coronary artery disease. In a case-control study, 50 patients treated with oral d,l-sotalol were matched to 50 patients treated with ICDs. Both groups were matched for sex (82 men), age (58 +/- 10 years), ejection fraction (40 +/- 12%), extent of coronary artery disease, presenting arrhythmia, and year that treatment began. In all patients in the sotalol group, VT/VF was inducible in the drug-free electrophysiological study. Induction of sustained VT/VF was suppressed by d,l-sotalol (438 +/- 95 mg/d). In the ICD group, either VT/VF was not inducible (n = 5) or inducible sustained VT/VF was refractory to antiarrhythmic drug treatment (n = 45). Sotalol treatment led to a marked reduction in arrhythmic events. Whereas 83% of the patients in the sotalol group were free of sudden death and nonfatal VT at 3 years, only 33% of the ICD patients did not receive appropriate ICD therapies (P < .005). Actuarial rates for absence of sudden death at 3 years were 85% in the sotalol group and 100% in the ICD group (P < .005). Actuarial rates for overall survival at 3 years were 75% in the sotalol group and 85% in the ICD group (P = .02). In this case-control study, ICD therapy was more effective tha electrophysiologically guided antiar-rhythmic treatment with d,l-sotalol in prevention of sudden death and reduction of total morality in patients with coronary artery disease. Prospective studies are needed to confirm these results.

Conservative therapy of breast cancer in Queensland

Primary radiation therapy following breast-conserving surgery has been an accepted alternative to mastectomy in Europe and North America for many years. In Australia, however, the history of breast conservation for early invasive breast cancer is much shorter. The purpose of this study was to evaluate the results of breast conservation in a state-wide Australian radiotherapy service. Between January 1982 and December 1989, 512 patients were treated with primary radiation therapy after breast conserving surgery. This analysis is based on a review of these patients, all of whom had Stage I or II breast cancer. With a median follow-up of 50 months, the 5-year actuarial rate of overall survival was 84% and disease-free survival was 80%. There have been 22 isolated local recurrences in the breast. The time to an isolated breast recurrence ranged from 12 to 83 months (median, 26 months). The 5-year actuarial rate of an isolated breast recurrence was 4%. The recurrence rate was higher for patients with involved margins (15% vs. 2%, p < 0.01). Local recurrence was also more likely in the presence of extensive ductal carcinoma in situ (DCIS), as opposed to no extensive DCIS (10% vs. 2%, p < 0.01). These results affirm that primary radiation therapy after breast conserving surgery in Queensland, has been given with a low rate of local recurrence, comparable to that obtained in other centers.

Nonfunctioning islet cell carcinoma of the pancreas.

Nonfunctioning islet cell carcinoma of the pancreas has a variable and often indolent natural history, which has resulted in a wide range of treatment recommendations. To more clearly define the natural history and appropriate treatment of this disease, we reviewed our institutional experience over the last 39 years. The records of all patients confirmed to have a nonfunctioning islet cell carcinoma of the pancreas were retrospectively reviewed. Kaplan-Meier life tables were constructed and log-rank comparisons were performed. The 73 patients studied had an overall 5-year actuarial survival rate of 50%. Patients with localized disease at presentation (n = 39) had a significantly higher survival rate (p = 0.03) compared with patients with metastatic disease (n = 34). The 19 patients who underwent a potentially curative resection of the primary tumor had a significantly higher survival rate (p = 0.03) compared with the 20 patients with locally advanced, unresectable, nonmetastatic disease. Nine of these 20 patients died of complications of the primary tumor. In contrast, only 2 of 22 cancer-related deaths in the 34 patients with metastatic disease at diagnosis were due to the primary tumor. (1) Surgical resection should be performed in patients with resectable nonmetastatic disease. (2) Resection of the primary tumor in the presence of metastatic disease is rarely indicated. (3) Innovative treatment strategies are needed for patients with locally advanced, unresectable, nonmetastatic tumors of the pancreatic head.

Microinvasive ductal carcinoma of the breast treated with breast-conserving surgery and definitive irradiation

An analysis was performed of 39 consecutive women with microinvasive ductal carcinoma of the breast treated with breast-conserving surgery and definitive irradiation during the period 1977 to 1988. Microinvasive ductal carcinoma was defined as predominantly intraductal carcinoma with microscopic or early invasion. Surgical treatment of the primary tumor included excisional biopsy or wide resection. Axillary lymph node staging showed that 37 patients were pathologically node negative and two patients were pathologically node positive, each with only one positive lymph node. The median follow-up was 55 months (mean = 65 months; range = 25–135 months). The 5-year actuarial rate of overall and cause-specific survival were both 970%. The 5-year actuarial rate of freedom from distant metastases was 93%. Nine patients developed a recurrence in the breast; eight of the nine patients had isolated local only first failures, and one of the nine patients had a local recurrence simultaneously with distant metastases. The median time to local failure was 42 months (mean = 53 months; range = 20–116 months). Of the eight patients with local only first failure, seven patients have been salvaged with further treatment and remain free of disease at the time of last follow-up, and one patient has died of subsequent distant metastatic disease. Median follow-up after salvage treatment was 29 months (mean = 27 months; range = 0–54 months). Comparison of the patients with microinvasive ductal carcinoma with two control groups of intraductal carcinoma and invasive ductal carcinoma was performed. Although the rate of local failure was significantly higher for patients with microinvasive ductal carcinoma as compared to the two control groups, the rates of survival and freedom from distant metastases for patients with microinvasive ductal carcinoma were intermediate to the two control groups. Because of the high rates of survival and freedom from distant metastases and because of the ability to salvage patients with local recurrence, breast-conserving surgery and definitive irradiation should continue to be considered as an alternative to mastectomy for appropriately selected and staged patients with microinvasive ductal carcinoma of the breast.

Results of Contemporary Radical Cystectomy for Invasive Bladder Cancer: A Clinicopathological Study With an Emphasis on the Inadequacy of the Tumor, Nodes and Metastases Classification

We reviewed 261 patients who underwent a radical operation at a single institution as definitive treatment of invasive bladder cancer to evaluate the survival and accuracy of the tumor, nodes and metastasis system in characterizing the prognosis. Between January 1979 and June 1987 the 261 evaluable patients underwent 1-stage radical cystectomy with pelvic node dissection and urinary diversion. No chemotherapy and/or radiation therapy was given before or after the operation. The postoperative mortality rate was 1.8%. The over-all staging error between clinical and pathological stages was as high as 44%.The over-all actuarial 5-year survival rate was 54.5%. The 5-year survival rates were 75% for stage pTl, 63% for stage pT2, 31% for stage pT3 and 21% for stage pT4 disease. A significant difference in the survival (p <0.002) was observed in stage pT3 by dividing tumors confined within the bladder wall (pT3a, 50%) from those extending throughout the bladder wall (pT3b, 15%).A careful evaluation of transitional cell involvement of the prostate in stage pT4a cancer led to the identification of 2 different patterns: 1) contiguous when a bladder tumor extended directly into the prostate through the bladder wall and 2) noncontiguous when a bladder tumor and a transitional cell carcinoma of the prostate were found simultaneously. These patterns had completely different (p <0.05) survival rates (6 versus 37%).The patients with high grade tumors had a worse prognosis in comparison with those with grades 1 and 2 tumors (41 versus 56%, p <0.005). The over-all 5-year survival of patients with positive nodes was 4% in comparison with 60% of those without nodal involvement (p <0.001).Despite current optimal surgical treatment, nearly 50% of all patients with invasive bladder cancer continue to die. The need for a modification of the current tumor, nodes and metastasis tumor classification to provide the clinician a more reliable staging system for planning treatment modalities is indeed mandatory.

Conservative Surgery for Renal Cell Carcinoma: A Single-Center Experience with 100 Patients

From January 1956 to March 1987, 100 patients underwent a conservative (parenchyma-sparing) operation as curative treatment for renal cell carcinoma at our clinic. This series includes 56 patients with bilateral (28 synchronous and 28 asynchronous) and 44 with unilateral renal cell carcinoma; in the latter category the contralateral kidney was either absent or nonfunctioning (17 patients), functionally impaired (17), involved with a benign disease process (6) or normal (4). The pathological tumor stage was I in 75 patients, II in 9, III in 10 and IV in 6. A nephron-sparing operation was performed in situ in 86 patients and ex vivo in 14.Postoperatively, 93 patients experienced immediate function of the operated kidney, while 7 required dialysis (4 temporary and 3 permanent). The incidence of dialysis was greater after ex vivo than in situ surgery (p equals 0.0005). The mean postoperative serum creatinine level in 97 patients with renal function was 1.7mg. per dl. (range 0.9 to 4.6mg. per dl.).The over-all actuarial 5-year patient survival rate in this series is 67 per cent including death of any cause and 84 per cent including only deaths of renal cell carcinoma. Survival was improved in patients with stage I renal cell carcinoma (p less than 0.05). Survival also was improved in patients with unilateral renal cell carcinoma (p less than 0.05) and fewer patients in this category had recurrent disease postoperatively (p less than 0.0005). Nine patients (9 per cent) had local tumor recurrence postoperatively and 5 of these were rendered free of tumor by secondary surgical excision. Conservative surgery provides effective therapy for patients with localized renal cell carcinoma in whom preservation of renal function is a relevant clinical consideration.

Can the results of live donor kidney transplantation be improved?

According to an analysis of 100 consecutive kidney transplants from live donors performed at our center over a 25-month period beginning in June 1980, only two patients have died, and five other patients had graft loss from acute or chronic rejection; this resulted in an overall actuarial 2-year patient survival rate of 98% and a graft survival rate of 90%. Eighty-five of the 93 patients with functioning grafts have excellent renal function, with serum creatinine levels less than or equal to 2 mg/dl. Complications occurred in 24 patients but rarely jeopardized the patients' lives or grafts or resulted in permanent disability. The functional capacity of most of the patients was improved by transplantation or was excellent both before and after transplantation. Forty-three transplants were possible through the use of the original or Imuran-modified donor-specific transfusion protocol, so that the lack of compatible donors rarely limited the availability of this therapy. New therapies that might improve graft or patient survival rate cannot reasonably be evaluated in recipients of live donor kidney transplants, because these results are already good. We have estimated that as much as $3.6 million in health care funds could be saved every 2 years at our center if we offered kidney transplants from healthy willing donors to all recipients before instituting dialysis. From our study we conclude that live donor kidney transplantation is an available, highly effective, and cost-efficient form of therapy for patients with end-stage renal disease.

HODGKIN'S DISEASE: TEN YEARS' EXPERIENCE OF A COMBINED LYMPHOMA CLINIC

The fate of 193 patients with Hodgkin's disease treated by The Prince of Wales Hospital Cooperative Oncology Group (Lymphoma) over a ten-year period is presented. Over-all actuarial survival rates of 54% and 41% at five and 10 years respectively are obtained. Five years' survival rates for patients with Stages I, II, III, and IV of disease are 76%, 55%, 51% and 35% respectively. Lower survival figures than those observed overseas for patients with Stage II and Stage III of Hodgkin's disease appear to be related to the extent of therapy given. New treatment policies for the Cooperative Group in line with overseas experience are formulated.