BETWEEN TRAITS, STATES, AND DIAGNOSES: DIFFERENTIATING AUTISM, BIPOLAR DISORDER, AND BORDERLINE PERSONALITY DISORDER IN ADULT WOMEN WITH COMPLEX PSYCHIATRIC TRAJECTORIES

Abstract

Late autism spectrum disorder (ASD) diagnosis in adult women may occur within extensive psychiatric trajectories involving early suffering, affective crises, self-injury, suicidality, trauma, pain, exhaustion, and apparently preserved functioning. This evidence-based professional-practice article presents a critical narrative synthesis on the differential diagnosis among ASD, ASD with borderline personality disorder (BPD), and ASD with bipolar disorder. A trait–state–context–functional cost framework, supplemented by diagnostic-provenance analysis, is proposed as a non-validated heuristic structure to organize longitudinal reasoning without replacing current diagnostic criteria. The literature indicates that emotional dysregulation, irritability, self-injury, sleep changes, interpersonal difficulties, and variable productivity have low specificity when examined in isolation. Clinical discrimination depends on developmental continuity, change from baseline, episodicity, interpersonal reactivity, sensory processing, identity, rejection sensitivity, sleep need, goal-directed activity, context, and subsequent functional impact. Hypothetical clinical scenarios illustrate differential-reasoning problems without constituting research data. Conclusions should be interpreted in light of the narrative nature of the synthesis, study heterogeneity, and the scarcity of evidence specifically addressing autistic adult women with bipolar disorder. Late ASD recognition should reorganize, rather than erase, the previous psychiatric history.