Signs and symptoms of an effusion vary depending on the underlying disease, but dyspnea, cough, and pleuritic chest pain are common. Chest examination of a patient with pleural effusion is notable for dullness to percussion, decreased or absent tactile fremitus, decreased breath sounds, and no voice transmission.
Medical Definition of velamentous insertion. : attachment of the umbilical cord to the chorion beyond the margin of the placenta.
Definition. Homologous recombination is the exchange of DNA strands of similar or identical nucleotide sequence. It can be used to direct error-free repair of double-strand DNA breaks and generates sequence variation in gametes during meiosis.