[Some aspects of focal infections of the head and neck region].

The so-called focal infections are today considered to be poly-etiologic manifestations, in which there is a summation of various aggressions. The concept of focal infection is still not exactly defined. Bacterial products, toxic or antigenic substances originating from different foci are but one of the elements susceptible of unleashing the disease. This explains why there are so many foci and so few results after their elimination. The diagnosis of chronic tonsillitis or occult sinusitis especially concerning a focal disease is sometimes difficult. The ENT-specialist is responsible for both the detection of a focus in the head and neck region and its operative treatment. The interrelationship between a focal infection and its actual secondary disease must be diagnosed by the primarily inquired doctor. The diagnosis and the treatment of focal infections of the head and neck region are an interdisciplinary problem.