Brentuximab vedotin plus AVD for Hodgkin lymphoma: incidence and management of peripheral neuropathy in a multisite cohort.

Brentuximab vedotin (BV) in combination with doxorubicin, vinblastine, and dacarbazine (AVD) is increasingly used for frontline treatment of stage III/IV classical Hodgkin lymphoma (cHL). Peripheral neuropathy (PN) was the most common and treatment-limiting side effect seen in clinical trials but has not been studied in a nontrial setting, in which clinicians may have different strategies for managing it. We conducted a multisite retrospective study to characterize PN in patients who received BV + AVD for newly diagnosed cHL. One hundred fifty-three patients from 10 US institutions were eligible. Thirty-four patients (22%) had at least 1 ineligibility criteria for ECHELON-1, including stage, performance status, and comorbidities. PN was reported by 80% of patients during treatment; 39% experienced grade (G) 1, 31% G2, and 10% G3. In total, BV was modified in 44% of patients because of PN leading to BV discontinuation in 23%, dose reduction in 17%, and temporary hold in 4%. With a median follow-up of 24 months, PN resolution was documented in 36% and improvement in 33% at the last follow-up. Two-year progression-free survival (PFS) for the advanced-stage patients was 82.7% (95% confidence interval [CI], 0.76-0.90) and overall survival was 97.4% (95% CI, 0.94-1.00). Patients who discontinued BV because of PN did not have inferior PFS. In the nontrial setting, BV + AVD was associated with a high incidence of PN. In our cohort, which includes patients who would not have been eligible for the pivotal ECHELON-1 trial, BV discontinuation rates were higher than previously reported, but 2-year outcomes remain comparable.

Evolution of abdominal pigmentation differences across species in the Drosophila dunni subgroup.

The Drosophila dunni subgroup displays a nearly perfect latitudinal cline in abdominal pigmentation that likely resulted from selective forces acting in the habitat of each species during speciation. Here we characterize the nature of this clinal variation by developing a quantitative measure to assess variation in abdominal pigmentation within and between the D. dunni subgroup species. Using discriminant analysis, we confirm the existence of a cline and find that our quantitative measure of pigmentation distinguishes each of the species with singular efficacy. We then combine our quantitative phenotypic analysis of pigmentation with the phylogeny of the D. dunni subgroup species and map the species relationships into the three-dimensional morphological space defined by our pigmentation measures. In this manner, we can visualize how the species have traversed the morphological pigmentation space during the course of speciation. Our analysis reveals that natural selection has caused overall intensity of pigmentation among the northernmost species of the cline to converge. Along with this convergence in phenotype has been a relaxation in expression of sexual dimorphism in these species, indicating a possible shift in the relative intensity of natural and sexual selection. Our analysis indicates an accelerated rate of change in pigmentation for the darkest species in addition to this species evolving a novel abdominal pigmentation trait.

Genetic and developmental analysis of abdominal pigmentation differences across species in the Drosophila dunni subgroup.

Abdominal pigmentation pattern varies dramatically among the species of the Drosophila dunni subgroup across the islands of the Caribbean. Previously, we developed a quantitative measure of abdominal pigmentation to assess phenotypic variation within and between species of this group. In this paper, we use this quantitative measure in an interspecific genetic analysis to decipher the underlying genetic basis of pigmentation differences between one of the lightest and the darkest species in the group. Our analysis shows that pigmentation expression in different areas of the abdomen is under separate genetic control. For these different abdominal regions, we detected a wide range of genetic effects, including X-linked, autosomal additive, near single-gene dominant, and sex-specific effects. Combining these genetic results with our earlier phenotypic and phylogenetic analyses, we present a simple conceptual model to explain how change in the control of expression of pigmentation has evolved throughout the D. dunni subgroup.

Practical screening priorities for hearing impairment among children in developing countries.

Routine screening for hearing impairment in childhood is now widespread in industrial countries, although there is considerable controversy over the most efficient techniques and procedures. In most developing countries, however, routine screening programmes for hearing impairment do not currently exist. The problems involved in implementing screening programmes in developing and industrial countries are very different, and in selecting screening procedures for a particular population the following factors have to be taken into consideration: the environmental test conditions; the availability of resources for equipment and the training of testers; the local attitudes towards disability; the level of hearing impairment that may cause handicaps; and the major types of pathology causing hearing impairment. We suggest that in developing countries children should be screened at school entry using a simple field audiometer and that the external ear be inspected for the presence of a discharge. There is an urgent need to develop reliable and simple screening procedures for infants and young children; where possible, all children should be screened for severe or significant hearing impairment before the age of 2 years. No screening should, however, be implemented until appropriate follow-up services are available.

PIP: Routine screening for hearing impairment in childhood is now widespread in industrial countries, although there is considerable controversy over the most efficient techniques and procedures. In most developing countries, however, routine screening programs for hearing impairment do not currently exist. The problems involved in implementing screening programs in developing and industrial countries are very different, and in selecting screening procedures for a particular population the following factors have to be taken into consideration: the environmental test conditions; the availability of resources for equipment and the training of testers; the local attitudes towards disability; the level of hearing impairment that may cause handicaps; and the major types of pathology causing hearing impairment. The author suggest that in developing countries, children should be screened at school entry using a simple field audiometer and that the external ear be inspected for the presence of a discharge. There is an urgent need to develop reliable and simple screening procedures for infants and young children; where possible, all children should be screened for severe or significant hearing impairment before the age of 2 years. No screening should, however, be implemented until appropriate follow-up services are available. (author's)