For existing classification in psychiatry (DSM-IV and ICD-10) in a foreseeable future syndromatic approach is more pragmatic and consequently demands searches of ways to its perfection. Most often in common medical networks they come out as a hyperventilation syndrome - 2,1%), - 4,7% and irritable colon syndrome 2,8% whereas the total share of other OS makes 1,8%; the similar data at general hospital make 1,8%, 0,6% and 1,0% against 0,5% accordingly, at a polyclinic - 7,3%, 15,6% and 9,7% against 6,1% accordingly. That reflects ambiguity of original attempts of reconciliation with nosologic classification system for studying a phenomenon of somatisation.

Somatoform syndrome within (OS) is presented within the limits of a continuum, where there is the mental pathology, including somatovegetative complex, at the one pole, and somatic infringements, amplificated by functional frustration at the other.

The central part of a continuum is formed actually with OS (functional frustration), on the one hand, masking, pushing aside on a level of facultative symptoms, psychopathological frustration, and on the other - duplicating (in the form of a cliche) symptom complex of somatic disease.

Accepting the increasing distribution the concept of comorbidity, should not simplify our activity, and opposite, definition types of comorbidity within somatoform syndrome, will allow to expand opportunities of studying pathogeny of somatisation. But absence the variants of personal reaction to frustration in ICD-10 complicates integration of psychiatry with internal medicine.