Analysis of the genetically tractable crustacean Parhyale hawaiensis reveals the organisation of a sensory system for low-resolution vision.

Background: Arthropod eyes have diversified during evolution to serve multiple needs, such as finding mates, hunting prey and navigating in complex surroundings under varying light conditions. This diversity is reflected in the optical apparatus, photoreceptors and neural circuits that underpin vision. Yet our ability to genetically manipulate the visual system to investigate its function is largely limited to a single species, the fruit fly Drosophila melanogaster.

Surgical and prosthetic treatment in an elderly patient affected by unilateral idiopathic gingival fibromatosis: a case report.

Objectives: The aim was to present the diagnosis and treatment of a case of unilateral idiopathic gingival fibromatosis (IGF) in a geriatric patient.

Background: IGF is a rare condition characterised by an enlargement of the attached and marginal gingivae with no obvious association to any causative factor. Gingival overgrowth causes inaesthetic changes and clinical symptoms such as speech disturbances, tooth movement, and occlusal problems.