Patient description: The patient is a 33-year-old woman complained of fatigue, weight gain and abnormal spotting between menses. No hirsutism or nipple discharge was detected. Her BMI was 34. Her lab results were remarkable for high TSH level (13 mU/L) and low free T4 level (0.2 ng/dl). Her anti-TPO levels were extremely high (120 IU/ml). She was diagnosed with Hashimoto's thyroiditis. Her aunt, brother and mother have the same disease. After starting 250 mcg Levothyroxine per day, her symptoms improved significantly and her periods are normal. She is still overweight with BMI of 31. Her most recent thyroid profile revealed all results except for anti-TPO within the normal range: TSH: 2.35 mU/L Free T4: 2.7 ng/dl Anti-TPO: 75 IU/ml

Clinical trial eligibility criteria: eligible ages (years): 18.0-55.0,  Obsessive-Compulsive Disorder Obsessive-Compulsive Behavior Schizophrenia Delusional Disorder Brief Psychotic Disorder Schizo Affective Disorder Other Psychoses Unspecified Psychosis General 1. Diagnostic ICD 10 at least one of the following ICD 10 diagnoses: 1. Obsessive-compulsive disorder ICD F42 or 2. Obsessive-compulsive behavior ICD R46.81 AND/OR 3. Schizophrenia, delusional, and other non-mood psychotic disorders, namely F20 Schizophrenia F22 Delusional disorders F23 Brief psychotic disorder F25 Schizoaffective disorders F28 Other psychotic disorder not due to a substance or known physiological condition F29 Unspecified psychosis not due to a substance or known physiological condition 2. Age: 18-55 3. Severity: Clinical Global impression (CGI): Minimum score of "4 = Moderately ill" 4. Swedish or English proficiency 5. The patient has tried at least 2 standard psychiatric medications at maximal tolerable or maximal recommended dosage for his/her current condition over a period of 6 months, but has not improved significantly 6. Medication has been unchanged for at least one month prior to study start 7. Signed informed consent 8. Use of adequate contraception 9. Radiological evidence of brain atrophy and scarring are absent 10. The clinical picture indicates active inflammatory activity (see specific below), potential for rehabilitation and time from disease and/or episode debut is no longer than 10 years. Specific 11. Acute (<12 weeks) or atypical debut, or episodes of any of the following: 1. Symptoms of encephalopathy: psychotic symptoms, including hallucinations, delusions, paranoia, disorganized speech, disorganized behavior agitation, confusion sudden change in personality as perceived by the social environment drowsiness loss of functions in daily Life cognitive problems (memory, speech, learning) emotional dysregulation 2. Focal neurological symptoms, e.g. ataxia, dystonia, myoclonus, sensory losses, paresthesia 3. Psychomotor anomaly, e.g.retardation, catatonic symptoms, parkinsonism 4. Loss of drive (sleep, appetite, libido, motivation) 5. Obsessions, compulsions (OCD/OCB), 6. Hypo or hypervigilance (for e.g sounds, emotions, other peoples´ or own behavior) 7. Sleeping disorders, AND 12. At least one of the following 1. Prodromal phase with infection or symptoms of infection (fever, malaise, etc) 2. Clinical improvement of psychiatric symptoms after treatment with anti-inflammatory medications other than antibody therapy (such as steroids, NSAIDs IVIG, plasmaphereses), or antibiotics 3. Radiological evidence of neuroinflammation (MR) 4. EEG pathology or witnessed epileptic seizure 5. Biochemical evidence of inflammation, autoimmunity or blood-brain barrier dysfunction in blood or CSF samples, such as one of the following: presence of oligoclonal bands elevated CSF cell count elevated albumin quotient, or elevated albumin in CSF elevated Immunoglobulin G (IgG) ratio elevated levels of neurofilament 6. Patient history of autoimmune disorder not associated with neuroinflammation, such as type 1 diabetes, rheumatoid arthritis, Sjögren´s syndrome, inflammatory bowel disease (IBD, comprising Crohn´s disease and ulcerative colitis), celiac disease, Grave´s disease, Hashimoto's thyroiditis 7. Biochemical indication of autoimmunity such as elevated serum anti-thyroid peroxidase (TPO) antibody, antinuclear antibody (ANA), anti-neutrophil cytoplasmic antibody (ANCA), rheumatoid factor (RF) or glutamic acid decarboxylase (GAD) antibodies, panel with relationship to symptom development  Concomitant malignancies or previous malignancies within the last five years 14. Cannot comply with vaccination recommendations 15. History of severe allergic or anaphylactic reactions in conjunction with prior treatment with monoclonal antibodies 16. Prior antibody therapy including Rituximab (MabThera®/Rituxan®) 17. Patient has been treated with clozapine (which may have immunosuppressant effect), systemic corticosteroids or IVIG within 60 days prior to screening visit 18. Prior treatment with immunosuppressant medications (not including systemic corticosteroids and IVIG) for other medical condition 19. History of or positive screening for HIV, Tuberculosis, Hepatitis B and/or Hepatitis C (ever) 20. Heart disease such as previous heart attack, arrhythmia or heart failure, coronary insufficiency 21. Current drug, alcohol, or chemical abuse 22. Pregnancy at any time during the study 23. Known chronical significant bacterial/viral/fungal infections at infusion date 24. Diagnosis of well-established neuroinflammatory disease such as Multiple Sclerosis (MS) (ICD codes G00-G09, G35-G37) or systemic lupus erythematosus (SLE) (M32) 25. Tested positive for autoantibodies in serum or CSF associated to known and treatable neuroinflammatory disease (such as neuroborreliosis, treatable autoimmune encephalitis). Patients having completed recommended treatment without significant improvement may still be included in this study. 26. History of any illness that in the opinion of the investigator may jeopardize the ability of the patient to participate in the study. 27. Patient is enrolled in another medical trial