Understanding Complex PTSD (cPTSD) in the ICD-11: Symptoms, Distinctions, and Overlap with Other Disorders

This podcast episode, hosted by Dr. Donnelly Snipes, delves into Complex Post-Traumatic Stress Disorder (cPTSD) as recognized by the ICD-11, contrasting it with the DSM-5-TR, which currently does not include cPTSD as a distinct diagnosis. The core criteria for cPTSD involve exposure to prolonged or repetitive, extremely threatening or horrific events from which escape is difficult or impossible, with the severity of 'horrific' being age-dependent. Crucially, individuals must also exhibit all three core elements of PTSD (re-experiencing, avoidance, and hypervigilance) for at least several weeks. A key distinction highlighted is that, unlike typical PTSD, the startle reaction in cPTSD may be diminished rather than enhanced, attributed to prolonged HPA axis activation leading to reduced sensitivity.

Beyond the core PTSD symptoms, cPTSD is characterized by severe and pervasive problems in affect regulation, dissociative symptoms under stress, and emotional numbing, particularly an inability to experience positive emotions. These are also linked to HPA axis dysregulation, causing shifts from emotional flatness to furious outbursts. Individuals with cPTSD often harbor persistent negative self-beliefs, feeling diminished, defeated, or worthless, accompanied by deep shame, guilt, or failure related to the trauma. Furthermore, they experience persistent difficulties in sustaining relationships and feeling close to others, often stemming from betrayal or abandonment in past traumas. The ICD-11 uniquely acknowledges that even if functioning is maintained, it is only through 'significant additional effort,' likening it to running a marathon with an 80-pound rucksack.

The episode emphasizes that cPTSD symptoms are generally more severe and persistent than those of singular-event PTSD, due to the chronic nature of the trauma, which leads to more widespread triggers and neurological changes like amygdala strengthening and vagus nerve weakening. Children and adolescents are particularly vulnerable to developing cPTSD, as their brains are more malleable, making them susceptible to neurodegeneration. This often manifests as cognitive difficulties (attention, planning, organizing), frequently misdiagnosed as ADHD, and pervasive affect dysregulation, appearing as regression or aggressive behavior. When caregivers are the source of trauma, disorganized attachment often develops, leading to intense, unstable relationships.

Dr. Snipes extensively discusses the significant overlap between cPTSD and other diagnoses, especially personality disorders (particularly Cluster B traits like those seen in Borderline Personality Disorder), depression, eating disorders, sleep-wake disorders, ODD, and separation anxiety. The ICD-11 provides clear guidance for differential diagnosis, stating that co-occurring diagnoses should only be made if symptoms are not fully accounted for by cPTSD. This suggests that many individuals previously diagnosed with personality disorders, especially with a history of chronic trauma, might be more accurately diagnosed with cPTSD, offering a more trauma-informed perspective on their challenges and pathways to healing.

the icd-11 which is the manual if you will that many other countries use has included complex ptsd as a legitimate indi independent diagnosis independent of bpd independent of ptsd

in order to qualify for complex ptsd a person has to have experienced exposure to prolonged or repetitive events that are extremely threatening or horrific from which escape is difficult or impossible

in complex post-traumatic stress disorder unlike post-traumatic stress disorder the startle reaction may in some cases be diminished rather than enhanced

they have to have severe and pervasive problems in affect regulation dissociative symptoms went under stress and emotional numbing particularly with regard to an inability to experience positive emotions

the person also has persistent beliefs about themselves as diminished defeated or worthless accompanied by deep and pervasive feelings of shame guilt or failure related to the trauma

if functioning is maintained it is only through significant additional effort so the icd-11 recognizes that people can have these symptoms and they can be experiencing extreme distress however they may still be quote high functioning but they're having to work twice three times four times as hard to be high functioning than people who aren't dealing with this

compared to ptsd complex ptsd symptoms are supposed to be more severe and persistent

children and adolescents are more vulnerable than adults to developing cptsd when exposed to severe and prolonged trauma their brain is more malleable their brain is not finished forming yet

the good news is and i i mention this a lot because i don't want people to feel helpless or hopeless our brain is regularly undergoing what's called neurogenesis

the icd-11 is very clear additional co-occurring diagnoses like adhd depression borderline personality should only be made if the symptoms are not fully accounted for by complex ptsd and all diagnostic requirements for each disorder are met