Extra-osseous osteochondroma-like soft tissue mass of the patello-femoral space

BACKGROUND: Extraskeletal cartilaginous tumors are uncommon. Osteochondromas usually arise from the metaphyseal region of the growing skeleton. CASE PRESENTATION: A 53 year old man presented with a three years history of anterior knee pain and inability to flex his knee more than 90°. Clinical examination and imaging studies revealed a nodular calcific mass in the anterior portion of the knee, displacing the medial portion of the patellar tendon. Following excision, histopathology confirmed the diagnosis of extra-osseous osteochondroma-like soft tissue mass, with no recurrence 24 months after surgery. CONCLUSION: An integrated clinical-pathologic diagnosis helps to clarify the nature of extraskeletal cartilaginous tumors that can arise at unusual anatomic site. Complete local surgical excision is the management of choice

Activit\ue9 potentielle de m\ue9thanogen\ue8se dans les sols, tourbi\ue8res, s\ue9diments lacustres et du r\ue9servoir hydro\ue9lectrique Robert-Bourassa dans le moyen Nord-Canadien

L\u2019immersion des sols lors de la cr\ue9ation d\u2019un r\ue9servoir hydro\ue9lectrique pourrait augmenter, au moins \ue0 court terme, le flux de m\ue9thane vers l\u2019atmosph\ue8re. Afin d\u2019\ue9valuer la contribution potentielle de tels am\ue9nagements \ue0 la production de m\ue9thane, nous avons \ue9tudi\ue9 l\u2019activit\ue9 potentielle des bact\ue9ries m\ue9thanog\ue8nes dans les sols de la for\ueat bor\ue9ale non immerg\ue9s et immerg\ue9s lors de la mise en eau d\u2019un r\ue9servoir, ainsi que des s\ue9diments lacustres. De cette \ue9tude comparative, il ressort que les tourbi\ue8res inond\ue9es p\ue9riodiquement (zone de marnage) ou en permanence, peuvent contribuer d\u2019avantage \ue0 la production de m\ue9thane que les tourbi\ue8res non inond\ue9es, les sols ou les s\ue9diments de lacs naturels. Toutefois, l\u2019intensit\ue9 et l\u2019\ue9volution temporelle de l\u2019activit\ue9 potentielle des bact\ue9ries m\ue9thanog\ue8nes dans les diff\ue9rents milieux pris en compte ont \ue9t\ue9 sous la d\ue9pendance d\u2019une combinaison de plusieurs facteurs environnementaux, notamment, la quantit\ue9 de la mati\ue8re organique, le niveau d\u2019eau et la pr\ue9sence de certains ions oxydants (SO\u2084\ub2\u207b, Fe\ub3\u207a).Flooding of land associated with the creation of reservoirs may increase, at least in the short term, methane flux to the atmosphere. To evaluate the potential contribution of such land use on methane production, field samples were studied in vitro for the potential activity of methanogenic bacteria in unflooded or flooded boreal forest soils, together with lacustrine sediments. From this comparative study, periodically flooded or flooded peats contribute more to methane production than do unflooded peats, soils, and natural lake sediment. The intensity and temporal changes in the activity of methanogenic archaea in the different systems depended on a combination of environmental factors, such as the amount and quality of organic carbon, the water level, and the concentration of oxidizing ions (SO\u2084\ub2\u207b, Fe\ub3\u207a).NRC publication: Ye

Tests of Lepton Universality Using B-0 -> K(S)(0)l(+) l(-) and B+ -> K*(+)l(+)l(-) Decays

Tests of lepton universality in B-0 -> K(S)(0)l(+)l(-) and B+ -> K*(+)l(+)l(-) decays where l is either an electron or a muon are presented. The differential branching fractions of B-0 -> K(S)(0)e(+)e(-) and B+ -> K*(+)e(+)e(-) decays are measured in intervals of the dilepton invariant mass squared. The measurements are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb(-1). The results are consistent with the standard model and previous tests of lepton universality in related decay modes. The first observation of B-0 -> K(S)(0)e(+)e(-) and B+ -> K*(+)e(+)e(-) decays is reported

Measurement of the CKM angle γ in the B0→DK *0 channel using self-conjugate D→ KS0h+ h- decays

A model-independent study of CP violation in B-0 -> DK (*0) decays is presented using data corresponding to an integrated luminosity of 9 fb(-1) collected by the LHCb experiment at centre-of-mass energies of v s = 7, 8 and 13TeV. The CKM angle. is determined by examining the distributions of signal decays in phase-space bins of the self-conjugate D. K(S)(0)h(+) h(-) decays, where h = p, K. Observables related to CP violation are measured and the angle. is determined to be. = (49+22 -19).. Measurements of the amplitude ratio and strong-phase difference between the favoured and suppressed B-0 decays are also presented