Given an abstract, generate a keyword (a noun phrase) that best describes the focus or contribution of the paper. Such keywords can be directly from the given abstract or outside it.

[EX Q]: Abstract: One hundred twelve patients who developed acute leukemia or a myelodysplastic syndrome (MDS) after chemotherapy or irradiation for another malignancy were reviewed. The median time from initial therapy to development of secondary leukemia or MDS was 71 months (range, 7 to 331 months). The initial malignancy was hematologic in 43%. An MDS presentation occurred in 57 patients (51%), 55% of whom subsequently transformed to acute leukemia. Chromosomal abnormalities were documented in marrow specimens from 70 of 89 patients with analyzable metaphases (79%; 69% of the total group). Compared with 34 patients with metachronous secondary leukemia without prior chemotherapy or irradiation, those with therapy-related leukemia exhibited a significantly higher frequency of abnormalities of chromosomes 5 and/or 7 (43% v 18%), and lower incidence of diploid karyotypes (18% v 50%). Chromosome 5 and/or 7 abnormalities were also significantly higher in patients previously treated with alkylating agents, procarbazine, and nitrosoureas (72% to 83%), compared with those who had received cyclophosphamide-based regimens (29%), other chemotherapies (14%), or irradiation alone (29%). The median overall survival from diagnosis of the secondary leukemia or MDS was 30 weeks. Survival was significantly shorter for patients with acute leukemia compared with MDS presentation (21 v 45 weeks); in the latter category, it was similar whether evolution to acute leukemia occurred or not. Of 72 patients treated with antileukemia therapy, 29% achieved complete remission (CR). A multivariate analysis of prognostic factors demonstrated the cytogenetic pattern to be the most important characteristic determining remission rate and survival. Other important prognostic features were the morphologic presentation (MDS v acute leukemia) for probability of achieving remission, and patient age and marrow blasts percentage for survival.
[EX A]: Antineoplastic Agents, Combined

[EX Q]: Abstract: A national survey of pain in the United States has been conducted, using a sample of 1254 persons 18 years of age or more, statistically constructed so as to permit projections to be made to the entire adult population of 174 million with a predicted accuracy of +/- 2-3%. Pain prevalence and severity, and its impact on work and other activities were obtained and correlated with demographic variables. This paper reports the portion of the study examining the association of pain with stress, daily hassles, measures of health locus of control, and various health habits. There was a very strong association between stress and pain and hassles and pain. The greater the stress and hassles, the greater the incidence, frequency and severity of all pains reported. Those with high internal health locus of control are more likely to have healthy behavior, are less likely to have all kinds of pain, and have less severe pain. Stress was voluntarily mentioned by respondents as a major cause of pain in headaches, backaches, stomach pains, and menstrual pains, but not for muscle, joint or dental pains.
[EX A]: Adult

[EX Q]: Abstract: Coronary dissection and total coronary occlusion leading to emergency coronary surgery are the most frequent complications of percutaneous transluminal coronary angioplasty (PTCA) and their occurrence usually is unpredictable. To identify angiographic characteristics of coronary stenoses that may affect the incidence of these complications, the diagnostic pre-PTCA coronary angiograms of 38 consecutive patients (group I) undergoing emergency coronary surgery for dissection or occlusion were reviewed and compared with the angiograms of a random sample of 38 patients (stratified for left anterior descending and right coronary arteries) from a group of 1151 who did not need emergency coronary surgery (group II). Stenosis morphology before angioplasty was considered "complicated" if at least one of the following criteria was present: irregular borders, intraluminal lucency, and localization of stenosis in curve or at bifurcation. Baseline characteristics, maximum inflation pressures, types of balloon catheters used, and routinely registered angiographic stenosis properties (severity, length, eccentricity, and calcification) were similar in both groups. Irregular borders before PTCA were present in 22 of 38 patients in group I vs 10 of 38 in group II (p less than .05), intraluminal lucency in 22 of 38 vs nine of 38 (p less than .05), localization in curve in 27 of 38 pts vs 16 of 38 (p less than .05), and localization at bifurcation in 11 of 38 vs 15 of 38 (NS). Complicated angiographic morphology of coronary stenosis may represent a risk factor for dissection or occlusion. Therefore, although the predictive value of these findings is low, detailed evaluation of angiographic morphology of coronary stenoses may improve patient selection and reduce complication rates of PTCA.
[EX A]:
Angioplasty, Transluminal

