Heightened perception of sounds generated by the body—for example, hearing their own footsteps abnormally loudly, altered perception of own voice. Feeling dizzy on hearing loud sounds, feeling dizzy ...

Mast cell tryptase (tryptase) is an enzyme produced almost exclusively by mast cells that is easy to measure using a widely available test. In this article we discuss the physiology of the mast cell ...

Correspondence to Dr Dipak Ram, Department of Paediatric Neurology, Royal Manchester Children’s Hospital, Manchester M13 9WL, UK; dipak.ram{at}cmft.nhs.uk Developmental regression is an important red ...