Classification by Course Type (A.V. Snezhnevsky)
Depending on the presence and quality of remissions, three main types of course are distinguished (coded by the fifth character in ICD-10).
Continuous type [F20.*0]
Characterized by the complete absence of remissions. Psychotic symptoms may fluctuate in intensity, but never disappear completely.
- Malignant forms (simple, hebephrenic, catatonic): early onset and rapid development of apathy-abulia syndrome.
- Paranoid form: manifests later, with delusions dominating the clinical picture. The prognosis is somewhat better, patients remain in society longer, but complete symptom reduction does not occur.
- Mild forms: patients can maintain working capacity for a long time.
Episodic-progredient (shub-like) type [F20.*1]
Characterized by alternating acute psychoses and remissions. Insomnia, anxiety, and fear of going insane are often noted in the prodrome.
- Features of the attack: lasts up to 6–8 months. Delusions are mostly sensory, unsystematized (ideas of staging, reference), accompanied by bewilderment and affective fluctuations.
- Dynamics: from attack to attack, personality defect increases in a stepwise manner. At later stages, the quality of remissions declines, and the course approaches a continuous one.
Periodic (recurrent) type [F20.*3]
The most favorable variant. Long lucid intervals—intermissions—are possible, during which personality changes are minimal.
- Attacks develop very acutely; affective disorders predominate over delusions. At the peak, oneiroid catatonia is possible.
- The defect does not reach emotional dullness; some patients experience only 1–2 attacks in their entire life.
- Nosological status: due to a minor defect and the dominance of affect, ICD-10 suggests classifying such conditions as acute transient psychotic disorders.
Psychopath-like schizophrenia
This form manifests with antisocial behavior, disinhibition of drives, strange hobbies, and unmotivated cruelty.
Key differences from personality disorders (psychopathies):
- Behavior is not related to parenting defects and family relationships.
- The disease manifests after a period of normal, well-adjusted development in childhood.
Course features:
- Sudden hatred towards parents arises, and old connections are severed.
- Patients are prone to vagrancy and psychoactive substance use (while addiction treatment yields no results).
- Shocking philosophical, misanthropic, or nationalist ideas are expressed.
- Short episodes of psychosis that are difficult to distinguish from intoxication are possible.
- As progression occurs, aggression and unruliness are replaced by total laziness, passivity, and autism.
Febrile schizophrenia and "fatal catatonia"
Febrile schizophrenia is an exceptionally rare psychosis manifesting during the first attack or after several delusional episodes. It is characterized by detachment, difficulty in communication from the first days, and oneiroid catatonia (stupor alternates with senseless chaotic excitement).
The outcome of severe psychoses can transition into a state of profound clouding of consciousness up to amentia. Gross somatic disorders develop:
- Fever above 40 °C;
- Tachycardia and dehydration;
- Petechiae and incipient cerebral edema.
Before the advent of ECT (electroconvulsive therapy) and antipsychotics, the majority of such patients died (hence the term "fatal catatonia"). Today, patients are successfully rescued, and upon emerging from psychosis, they usually develop a high-quality remission.
Prognostic factors
Prognosis assessment is composed of the patient's premorbid features and the nature of the disease itself.
| Criterion | Favorable prognosis | Unfavorable prognosis |
|---|---|---|
| Onset and rate | Late, acute, against the background of stress | Under 20 years old, slow, spontaneous |
| Symptoms | Productive (vivid emotions, delusions, mania) | Negative (impoverishment of emotions) |
| Consciousness | Confused | Alert |
| Medical history | Harmonious childhood, no burden | Cases of schizophrenia in the family, withdrawal in childhood |
| Physique | Pyknic, normosthenic | Asthenic, dysplastic |
| Social status | Family, profession, treatment adherence | No profession and family, refusal of antipsychotics |
Briefly: answers to topical questions
What types of catatonia can be observed in schizophrenia besides oneiroid?
Besides oneiroid catatonia, lucid catatonia is distinguished in schizophrenia.
- Lucid catatonia (lucidus — clear, bright, transparent) develops against the background of clear consciousness, characteristic of malignant variants of schizophrenia occurring without remissions, prognosis is unfavorable.
- Oneiroid catatonia — catatonic symptomatology is combined with dream-like clouding of consciousness, acute transient psychosis, prognosis is favorable.
The term "shub-like" originates from the German *Schub* — "push, shift". Imagine that each psychotic attack is a strong "push" that leaves behind a new step of defect, shifting the patient's personality ever closer to disability.
Class and exam questions
Do negative symptoms in schizophrenia always mean dementia?
No, negative symptoms (autistic withdrawal, indifference) do not reach the degree of true dementia; however, they lead to disability due to the patient's complete lack of motivation to cope with life's difficulties.
Why is psychopathy-like schizophrenia difficult to treat in addiction medicine settings?
Because psychoactive substance use in this form is part of the disinhibition of drives and the endogenous process, rather than mere addiction. Treatment solely by a narcologist does not affect the underlying disease and yields no results.
What is the difference between remission and intermission?
Intermission is a concept used in recurrent schizophrenia. It refers to a prolonged, high-quality lucid interval during which positive symptoms are absent and personality changes are minimal.
What else to study on this topic
- Features of apathy-abulia syndrome in malignant forms
- Differential diagnosis of intoxication psychoses and schizophrenia
- Oneiric catatonia: clinical picture of stupor and excitement
- Rationale for ECT in febrile schizophrenia
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