Asubspecialty orsubspeciality (seespelling differences) is a narrow field of professionalknowledge/skills within a specialty oftrade, and is most commonly used to describe the increasingly more diversemedical specialties. Asubspecialist is a specialist of a subspecialty.
Inmedicine, subspecialization is particularly common ininternal medicine,cardiology,neurology andpathology,psychiatry and has grown as medical practice has: