Challenges and Considerations in Treating Negative and Cognitive Symptoms of Schizophrenia Spectrum Disorders
Background: The prototypical patient with schizophrenia spectrum disorders (SSDs) is often thought to possess positive symptoms. However, patients with SSDs can present with predominantly negative and cognitive symptoms, which can create diagnostic and treatment challenges.
Case Presentation: A 33-year-old female veteran presented to the emergency department with diminished speech output, markedly blunted affect, tangential speech, was not oriented to situation, and appeared to be responding to internal stimuli. Following inpatient admission, the veteran was diagnosed with schizoaffective disorder, which was misdiagnosed as major depressive disorder and borderline personality disorder during her military service. She was initially treated with olanzapine injections and psychotherapy but continued to experience worsening symptoms, resulting in multiple hospitalizations. After starting clozapine, she demonstrated marked improvement and continued with outpatient mental health care.
Conclusions: Predominant negative and cognitive symptom presentations of SSDs require unique considerations to accurately identify and provide optimal treatment for the patient. Clozapine is a promising treatment for addressing these symptoms. This case demonstrates how careful multidisciplinary evaluations, review of health records, collateral information from family members, and other diagnostic and treatment considerations in patients with predominant negative and cognitive symptoms of SSDs can refine and enhance the clinical care offered to such patients.
Discussion
As the veteran’s case highlights, a predominantly negative and cognitive symptom presentation may present diagnostic challenges. Since this presentation may not be viewed as representative of SSDs, patients with this presentation may be misdiagnosed. This was evident in the current case, not only in the veteran’s prodromal phase of illness while in the Navy, but also in her reported previous diagnoses of borderline personality disorder and MDD. More than one clinician at the MEDVAMC provisionally considered a diagnosis of MDD before collecting collateral information from the veteran’s family regarding her clear psychotic symptoms. Unfortunately, such misdiagnoses may have prevented early intervention of the veteran’s schizoaffective disorder, which is found to be instrumental in reducing impairment and disability among patients with SSDs.7,8
These misdiagnoses are understandable given the considerable symptom overlap between SSDs and other mental health disorders. For instance, anhedonia and avolition are 2 key symptoms seen in depressive episodes. Both anhedonia and lack of positive emotion are often seen in posttraumatic stress disorder. Additionally, anxiety disorders may induce a lack of positive emotion, loss of interest in previously enjoyed activities, and lack of motivation secondary to primary symptoms of anxiety. Furthermore, schizoaffective disorder requires the presence of a major mood episode. In the absence of apparent positive symptoms (as is the case for patients with a predominantly negative symptom presentation), schizoaffective disorder may be easily misdiagnosed as a mood disorder.
Patients with predominantly negative or cognitive symptoms may also be less accepting of a diagnosis of SSD. A wealth of research points to the clear stigma of SSDs, with many suggesting that these disorders are among the most stigmatized mental health disorders.9 Therefore, patients with predominantly negative and cognitive symptoms may be more likely to attribute their symptoms to another, less stigmatized mental health disorder. This was seen in the current case, as the veteran repeatedly denied a diagnosis of schizoaffective disorder and instead claimed to have severe depression. This reluctance to accept a diagnosis of an SSD, coupled with the diagnostic ambiguity of negative symptoms, is likely to make it challenging for clinicians to accurately identify patients with a predominantly negative and cognitive symptom presentation of SSDs.
Clinicians working within a team-based setting may be less likely to misdiagnose patients as they can consult others. Diagnostic clarity in the current case was undoubtedly facilitated by the multidisciplinary team involved in the veteran’s care; clinicians involved in her care were able to consult with one another to determine that her symptoms were indicative of an SSD rather than a mood disorder. Mental health professionals in private practice are unlikely to have access to such multidisciplinary specialty services and may be particularly vulnerable to misdiagnoses.
