25,064 research outputs found
Neurofibromatosis type 1 with external genitalia involvement Presentation of 4 patients
No full textGenitourinary neurofibromas with clitoral involvement in neurofibromatosis type 1 are rare, and even more infrequent are the neurofibromas involving genitalia in males. The most frequent presenting sign of neurofibroma in females is clitoromegaly with pseudopenis, and enlarged penis is the most common sign in males. Labium majus neurofibroma not associated with clitoral involvement is extremely rare. Magnetic resonance imaging demonstration of the neurofibromas has seldom been reported. We report 4 children, 3 girls and I boy, with plexiform neurofibromas involving the external genitalia. Three of the 4 patients had histologic confirmation of neurofibroma. Two girls with clitoral hypertrophy had a neurofibroma that infiltrated the clitoris and extended unilaterally to the lower bladder wall. One girl had a plexiform neurofibroma that affected a labium. One boy with asymmetric Penile hypertrophy since 2 years of age and ipsilateral gluteal hypertrophy had plexiform neurofibromas that extended between the left lumbogluteal and Penile regions, infiltrating the left rectum wall and bladder with compression of both structures. the left prostate, and the left hall of the cavernous corpi with hypertrophy of this part and asymmetry of file penis. Magnetic resonance imaging demonstrated in all patients that external genitalia and plexiform neurofibroma formed images of nondetachable Structures. However, hermaphroditism was discarded by chromosomal study in all 3 girls before ratifying the diagnosis of external genitalia neurofibroma. (C) 2008 Elsevier Inc. All rights reserved
Mrs. Matheson Present Award to Dany Lopez
No full textMrs. Matheson Presenting The Leading Open Jumper Rider Sash and Award to Danny Lopez. Photograph. b/w. 20.3 cm. x 24.5cm.https://digitalcommons.liu.edu/post_equestrian/1030/thumbnail.jp
Mrs. Merrill Presents Award to Danny Lopez
No full textMrs. Merrill Presenting the Chanticleer Perpetual Trophy for Open Jumper Championship to Danny Lopez. Photograph. b/w. 20.3 cm. x 24.5 cm.https://digitalcommons.liu.edu/post_equestrian/1028/thumbnail.jp
The politics and economics of regulatory impact assessment
No full textThis is the author accepted manuscript. The final version is available from the publisher via the link in this record
Current constraints on early and stressed dark energy models and future 21 cm perspectives
No full textDespite the great progress of current cosmological measurements, the nature of the dominant component of the Universe, coined dark energy, is still an open question. Early dark energy is a possible candidate which may also alleviate some fine-tuning issues of the standard paradigm. Using the latest available cosmological data, we find that the 95% C.L. upper bound on the early dark energy density parameter is Tau(eDE) < 0.009. On the other hand, the dark energy component may be a stressed and inhomogeneous fluid. If this is the case, the effective sound speed and the viscosity parameters are unconstrained by current data. Future omniscopelike 21 cm surveys, combined with present cosmic microwave background data, could be able to distinguish between standard quintessence scenarios from other possible models with 2 sigma significance, assuming a non-negligible early dark energy contribution. The precision achieved on the Omega(eDE) parameter from these 21 cm probes could be below O(10%)
Dark matter microphysics and 21 cm observations DARK MATTER MICROPHYSICS and 21 CM OBSERVATIONS LOPEZ-HONOREZ, MENA, and VILLANUEVA-DOMINGO
No full textDark matter interactions with massless or very light standard model particles, as photons or neutrinos, may lead to a suppression of the matter power spectrum at small scales and of the number of low mass haloes. Bounds on the dark matter scattering cross section with light degrees of freedom in such interacting dark matter (IDM) scenarios have been obtained from e.g. early time cosmic microwave background physics and large scale structure observations. Here we scrutinize dark matter microphysics in light of the claimed 21 cm EDGES 78 MHz absorption signal. IDM is expected to delay the 21 cm absorption features due to collisional damping effects. We identify the astrophysical conditions under which the existing constraints on the dark matter scattering cross section could be largely improved due to the IDM imprint on the 21 cm signal, providing also an explicit comparison to the WDM scenario.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
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