Assessment of microvascular flow in human atherosclerotic carotid plaques using ultrasound localization microscopy.

Background: Neovascularisation of carotid plaques contributes to their vulnerability. Current imaging methods such as contrast-enhanced ultrasound (CEUS) usually lack the required spatial resolution and quantification capability for precise neovessels identification. We aimed at quantifying plaque vascularisation with ultrasound localization microscopy (ULM) and compared the results to histological analysis.

Ultrasound-guided needle aspiration of immediate postoperative symptomatic spinal epidural hematoma after lumbar stenosis surgical decompression in the elderly: a proof-of-concept case.

Background: Symptomatic spinal epidural hematoma (SSEH) is one of the most feared complications and source of litigation in spine surgery. Its occurrence rises up to 2% in minimally invasive spine surgery. In parts of the world where the population is aging, more fragile patients are expected to undergo degenerative spine surgery.

A late burst of colour evolution in a radiation of songbirds (Passeriformes: Parulidae) suggests secondary contact drives signal divergence.

Evolutionary radiations provide important insights into species diversification, which is especially true of adaptive radiations. New World wood warblers (Parulidae) are a family of small, insectivorous, forest-dwelling passerine birds, often considered an exemplar of adaptive radiation due to their rapid diversification followed by a slowdown. However, they deviate from the expectations of an adaptive radiation scenario due to the lack of conspicuous morphological and ecological differentiation.