Sometimes there is associated with these anomalies curious terminations of the salivary ducts, either through the cheek by means of a fistula or on the anterior part of the neck.
Microstoma .-- There are a few cases on record in which the mouth has been so small or ill-defined as not to admit of alimentation.

Molliere knew an individual of forty whose mouth was the exact size of a ten-centime piece.
Buchnerus records a case of congenital atresia of the mouth.

Cayley, Smith, Sourrouille, and Stankiewiez of Warsaw discuss atresia of the mouth.

Cancrum oris, scarlet fever, burns, scurvy, etc., are occasional causes that have been mentioned, the atresia in these instances taking place at any time of life.
Anomalies of the Lips .-- The aboriginal tribes are particularly noted for their large and thick lips, some of which people consider enormous lips signs of adornment.

Elephantiasis or other pathologic hypertrophy of the labial tissues can produce revolting deformity, such as is seen in Figure 100, representing an individual who was exhibited several years ago in Philadelphia.