The present case report describes a juvenile xanthogranuloma in a five-month-old girl. A circumscribed papule was located below the right nasal ala and above the right vermilion border. The lesion was histologically diagnosed as a juvenile xanthogranuloma after surgical resection of the mass. Juvenile xanthogranuloma is an uncommon diagnosis, with the head, neck and trunk being the most common ...

rate of animal populations oft en require estimates of adult survival and juvenile survival to breeding age. Estimates of adult survival currently exist for many migratory passerines (e.g. DeSante et al. 1998), yet estimates of juvenile survival remain elusive. Accurate estimation of the population growth rate, critical for assessing metapopulation dynamics, is dependent upon an accurate estima...

Current tests of the bright male hypothesis focus on assays of adult disease resistance and their relation to male trait development and female choice. We suggest that if parasites have significant harmful effects on juvenile stages of a host, then females selecting males that effectively signal juvenile parasite resistance may gain a significant ‘‘good genes’’ benefit. Currently, there is no i...

For species with complex life histories such as scleractinian corals, processes occurring early in life can greatly influence the number of individuals entering the adult population. A plethora of studies have examined settlement patterns of coral larvae, mostly on artificial substrata, and the composition of adult corals across multiple spatial and temporal scales. However, relatively few stud...

We address the hypothesis that fish that grow rapldly as larvae also grow rapidly as juveniles. Winter flounder Pleuronectes amerlcanus were reared from hatching through the larval period and up to 2 mo into the juvenile period. Successive cohorts of fish which metamorphosed on the same day were pooled and measured at weekly intervals during the early juvenile period. Growth rates of larvae and...

BACKGROUND Investigating gonadal gene expression is important in attempting to elucidate the molecular mechanism of sex determination and differentiation in the model species zebrafish. However, the small size of juvenile zebrafish and correspondingly their gonads complicates this type of investigation. Furthermore, the lack of a genetic sex marker in juvenile zebrafish prevents pooling gonads ...

Comparisons of protein composition between juvenile and adult organs of olive trees were made by SDS-polyacrylamide gel electrophoresis analysis. Plant material included leaves, bark and bud tissues obtained from juvenile and adult organs within the same plant as well as from separate plants of both the same and different genetic origin. The amount of protein loaded onto the gels was standardiz...

Surprisingly little research has evaluated how habitat size may limit the population size of species that use different habitats at different stages of their lives. Here we develop simple discrete-time models to describe the population dynamics of species that use separate juvenile and adult habitats. Analytic solutions, model simulations, and elasticity and sensitivity analyses show that adult...

Chief Inspector Cottam told us about the scheme; he had been in at its inception nine years ago under Sir Charles Martin. At this time research showed that 40 per cent of all children appearing before the Liverpool Juvenile Courts had previous police records. This fact and the heavy increase in juvenile crime generally, finally decided the police to start an experiment which was to be a system ...