Supersymmetric Ruijsenaars-Schneider model.

An integrable supersymmetric generalization of the trigonometric Ruijsenaars-Schneider model is presented whose symmetry algebra includes the super Poincaré algebra. Moreover, its Hamiltonian is shown to be diagonalized by the recently introduced Macdonald superpolynomials. Somewhat surprisingly, the consistency of the scalar product forces the discreteness of the Hilbert space.

Relapse in the skull after myeloablative therapy for high-risk neuroblastoma.

Patterns of relapse were determined for 20 high-risk neuroblastoma patients treated with chemotherapy, surgery, primary and metastatic site radiation (21 Gray), myeloablative chemotherapy, peripheral blood stem cell rescue, and 13-cis-retinoic acid. The median follow-up duration after transplant is 21 months (range, 8-34 months). The event-free survival and overall survival at 2 years were 45 and 75%, respectively. There were 2 primary site recurrences. Metastatic sites that became MIBG-scan negative on induction chemotherapy were not irradiated. Four patients relapsed in irradiated metastatic sites, 3 in the skull, 1 in the liver. Failure also occurred at 2 skull sites treated with chemotherapy only, and at 5 new sites: 1 skull, 2 distant lymph nodes, and 2 bones other than skull. Eight of 20 patients had skull metastasis at presentation; 6 were irradiated and 3 were controlled. Skull metastasis warrants more aggressive evaluation and treatment.

Disordered eating, body mass, and glycemic control in adolescents with type 1 diabetes.

OBJECTIVE: To examine the relationship between disordered eating attitudes and behaviors, BMI, and glycemic control in adolescents with type 1 diabetes. RESEARCH DESIGN AND METHODS: In a cross-sectional design, 152 adolescents (ages 11-19 years) completed three scales from the Eating Disorders Inventory (EDI): Body Dissatisfaction, Drive for Thinness, and Bulimia. All subjects had diabetes for > 1 year. Glycemic control was assessed by glycosylated hemoglobin (HbA1c). Height and weight were measured to assess BMI. RESULTS: Adolescents with type 1 diabetes did not report more disordered eating attitudes and behaviors than the normative comparison sample. Male subjects with type 1 diabetes reported fewer symptoms of bulimia and female subjects with type 1 diabetes reported greater body satisfaction than the normative group. A higher BMI was a significant predictor of greater body dissatisfaction, more so for female than male subjects. Symptoms of bulimia were associated with older adolescence and female sex. Those with more symptoms of bulimia were also more likely to have a higher BMI. Sex (female) and body dissatisfaction (more dissatisfied) predicted a stronger desire to be thin. Longer duration of disease, more symptoms of bulimia, and obesity all predicted poorer glycemic control. CONCLUSIONS: Female patients aged 13-14 years seem to be at greatest risk for developing disordered eating patterns. Using the clinical cutoff score (> or = 5) of the EDI Bulimia subscale as a screener in diabetes clinics may help identify adolescents whose disordered eating patterns are likely to compromise their glycemic control.

New techniques in the radiotherapeutic treatment of gynecological malignancies.

The management of patients with gynecological malignancies serves as a prominent example of the importance of multi-modality oncologic therapy. Optimal treatment of these patients requires the skillful implementation of surgery, radiation therapy and chemotherapy. The decision to use simple versus combined modality therapy is crucial and best carried out in centers in which an experienced and coordinated multidisciplinary team is available. In this article, we have reviewed the most recent data regarding the role of radiation therapy in gynecological malignancies and have pointed out those areas where additional confirmatory studies are needed.

Choriocarcinoma metastatic to the lung. A cytologic study with identification of human choriogonadotropin with an immunoperoxidase technique.

A case of choriocarcinoma metastatic to the lung following a previous hydatidiform mole is presented. It was possible to make definitive identification of trophoblastic elements on a needle aspiration biopsy using an immunoperoxidase staining technique, thus avoiding diagnostic thoracotomy prior to therapeutic intervention. A method of immunoperoxidase staining of previously fixed and Papanicolaou-stained needle aspiration biopsy specimens is also described, and other uses of the immunoperoxidase technique on needle biopsy specimens are discussed.

Giant-cell carcinoma of the lung. A cytologic study.

A case of giant-cell carcinoma of the lung, confirmed at autopsy, is presented. The cytologic features seen in sputum samples, bronchial washings and brushings and fine needle aspiration biopsy material as well as the histologic findings are described. The possible relationship to bronchioloalveolar carcinoma is discussed. The cytologic features of giant-cell carcinoma of the lung, when seen in the context of the clinical and radiologic setting, should allow the cytologic identification of the tumor prior to surgical intervention.

Antenatal assessment of fetal age and maturity using fetal fat staining cells in amniotic fluid.

A cross sectional retrospective study of 400 cases of amniocentesis was performed to evaluate the reliability of using fetal fat staining cells as a method for assessment of fetal age and maturity. A sharp rise in the percentage of these cells in amniotic fluid occurred after 37 weeks of gestation and a level of 20 per cent or more indicated fetal age of 38 weeks or more, corresponding to maturity by our definition. The false positive and negative rates were 3.5 per cent and 14 per cent respectively. The pre-eclamptics, diabetics and Rh sensitized groups fell within the distribution of the normal population. The dysmature group, however, showed an earlier rise (20% at 36 weeks). The origin of the fetal fat staining cells and the reasons for the early rise in dysmaturity are discussed. Estimation of fetal fat staining cells in the amniotic fluids using the 20 per cent level is a reliable test for maturity in normal and some abnormal pregnancies, excluding dysmaturity.