The disease is rare, and consists usually of one or several (exceptionally numerous), variously-sized tumors of the skin, made up of smooth muscular fibres. They are flat, rounded, oval or pedunculated, and have a smooth surface and a pale-red color; as a rule, they are painless. The growth is benign, and consists essentially of a new formation of unstriped muscular fibres; but it may also be composed largely of connective tissue (_fibromyoma_); or it may contain an abundance of bloodvessels (_myoma telangiectodes_, _angiomyoma_); or there may be lymphatic involvement (_lymphangiomyoma_). #Angioma.# (_Synonyms:_ Naevus Vasculosus; Naevus Sanguineus.) #Give a definition of angioma.# Angioma is a congenital hypertrophy of the vascular tissues of the corium and subcutaneous tissue. Exceptionally it makes its appearance a few weeks or a month after birth. #Into what two classes may angiomata be roughly grouped?# The flat (or non-elevated) and the prominent (or elevated). #Describe the flat, or non-elevated, variety of angioma.# The flat, or non-elevated, angioma (_naevus flammeus_, _naevus simplex_, _angioma simplex_, _capillary naevus_) may be pin-head- to bean-sized; or it may involve an area of several inches in diameter, and, exceptionally, a whole region. It is of a bright- or dark-red color, and is met with most frequently about the face. In some instances it extends after birth, reaches a certain size and then remains stationary; occasionally, when involving a small area, it undergoes involution and disappears. The so-called _port-wine mark_ is included in this group. #Describe the prominent, or elevated, variety of angioma.# The prominent variety (_venous n[oe]vus_, _angioma cavernosum_, _n[oe]vus tuberosus_) is variously-sized, often considerably elevated, clearly-defined, compressible, smooth or lobulated, and of a dark, purple color; it may, also, be erectile and pulsating. The growth is usually a single formation, and is met with upon all parts of the body. #What is the pathology of angioma?# It is a new growth, consisting of a variable hypertrophy of the cutaneous and subcutaneous arterial and venous bloodvessels, with or without an increase of the connective tissue. #Give the treatment of angioma.# In some instances, especially in infants, painting the parts repeatedly with collodion or liquor plumbi subacetatis will act favorably. For well-established, small, capillary naevi electrolysis or puncturing with a red-hot needle or with a needle charged with nitric acid may be employed; for "port-wine mark" frequent and closely contiguous electrolytic punctures are occasionally followed by a slight diminution in color. For the _prominent growths_, vaccination, the ligature, puncturing with the galvano-cautery, and excision are variously resorted to. In recent years applications of liquid air and carbon dioxide have proved of service in some cases.