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The authors present the case of a 68-year-old lady with a 35-year history of bipolar affective disorder (BPAD) type I, who developed frontotemporal dementia (FTD). Description of the psychopathology is illustrated with examples of patient's writings in order to demonstrate cognitive abilities at different stages. The diagnosis is supported by MRI and SPECT scans. The authors discuss the difficulties in differentiating the clinical presentation of chronic BPAD and FTD and examine the evidence for two important questions: Is there a relationship between BPAD and FTD and is there a relationship between lithium and risk of dementia? This is, to the best of our knowledge, the first reported SPECT scan finding in a case of frontotemporal dementia following chronic bipolar affective disorder. [ABSTRACT FROM AUTHOR]

This case report describes interaction of trauma, endocrine disorder and infection resulting in a complex psychopathology in an 82-year-old, previously healthy lady. One month after a hip replacement, she developed fluctuating cognitive impairment and delusions, associated with hyponatraemia. Shortly afterwards, development of severe depression resulted in a prolonged psychiatric admission. During this time, she suffered recurring urinary tract infections (UTIs). Delusions and fluctuating cognition persisted. Persistent hyponatraemia prompted regular cortisol monitoring. Gradual decline was detected and primary adrenal insufficiency was confirmed with Synachten test. Starting life-long substitution treatment resulted in a normalisation of serum sodium levels, mood and cognition and disappearance of psychotic features. According to our hypothesis, psychopathology was induced by hypoadrenalism triggered by the hip replacement and perpetuated by recurrent UTIs. Although delirium-type symptoms are well known to be associated with hyponatraemia, affective disorders have been only described in one previous case report.