Osteocondritis disecante de la cabeza del 2º metacarpiano en un niño: a propósito de un caso

La osteocondritis disecante en articulaciones de la mano es un proceso muy raro, sólo existen dos casos previos publicados en la literatura. Presentamos un paciente de 10 años de edad con dolor e impotencia funcional de la articulación metacarpofalángica de la mano izquierda de semanas de evolución. Con el diagnós - tico final de osteocondritis disecante realizamos una resección del fragmento libre asociadas a perforaciones con aguja fina. Tras el primer año de seguimiento el paciente se encuentra asintomático y se observa remodelación casi completa de la superficie articular.Ostheocondritis in the hand is a rare process. Only two cases were reported in the previous litera - ture. In this report we present a 10 years old boy with pain and a few functional limitation in second metacarpal phalangeal joint for weeks. With the final diagnosis of osteochondritis dissecans we performed surgery. Intraope - ratively the cartilage flap was removed and some drilling was realized. Before one year the patient was asympto - matic and we observed an improvement of articular surface

Advances in the phylogenetic study of the tribe Cinchoneae (Rubiaceae) with emphasis on the genus Cinchona and Ladenbergia

In its current circumscription, the Cinchoneae tribe includes 9 genera of neotropical distribution. Its species occur mostly in the Andes in South America, with few reaching Central America. Preliminary phylogenetic studies have suggested the monophyly of Cinchoneae but intrageneric relationships are still debatable. In this study, we sampled 8 genera of Cinchoneae (with ca 50% of species for Cinchona and Ladenbergia) and obtained multiple single-copy nuclear loci (ca 207 genes) by using the “Angiosperm353 universal probe set”, which was complemented with a taxonomic review of Cinchoneae. Phylogenetic inferences were realized with multispecies pseudo-coalescent (ASTRAL III) and gene concatenation analysis (ML). Our results strongly support the monophyly of the tribe and most of the genera, except for Ladenbergia. Furthermore, Ciliosemina, Ladenbergia, and Remijia formed a clade, although the position of Ciliosemina (= Remijia pedunculata) and Ladenbergia muzonensis is still elusive. The position of Ladenbergia muzonensis is intriguing due to its intermedíate floral morphology, which resembles both Remijia and Ladenbergia species. Additionally, our phylogeny also supports the recognition of a new species in Cinchona. Finally, our results show that sequencing data using the probe set designed for multiple gene capture is a useful tool for phylogenetic reconstructions in taxonomically complex groups

Laser Calibration System for Time of Flight Scintillator Arrays

A laser calibration system was developed for monitoring and calibrating time of flight (TOF) scintillating detector arrays. The system includes setups for both small- and large-scale scintillator arrays. Following test-bench characterization, the laser system was recently commissioned in experimental Hall B at the Thomas Jefferson National Accelerator Facility for use on the new Backward Angle Neutron Detector (BAND) scintillator array. The system successfully provided time walk corrections, absolute time calibration, and TOF drift correction for the scintillators in BAND. This showcases the general applicability of the system for use on high-precision TOF detectors.Comment: 11 pages, 11 figure