Unsuspected subdural hematoma as a differential diagnosis in elderly patients

A Plausible Historical and Forensic Account of the Death of Thomas Aquinas

Thomas Aquinas (1225-1274) was an influential medieval Christian theologian and arguably one of the greatest scholastic philosophers. He produced more than 60 works in his 48 years, including his magnum opus, the Summa Theologica. The Catholic Church regards him as a canonized saint and one of 37 Doctors of the Church. On his way to an ecumenical council in 1274, he was "struck with sudden illness" requiring rest at a monastery where he was cared for until death several weeks later. An obscure Latin text describes an incident where he hit his head violently on an overhanging branch. Becoming progressively ill, he arrived at a Cistercian abbey where he died on March 7. Through an analysis of his final illness as documented in key Latin and Italian historical texts, and careful observation of the reputed skull relic in Priverno, Italy, the authors postulate that Aquinas may have suffered a traumatic brain injury and that his death at age 48 was occasioned by a chronic subdural hematoma. Examination of the skull was inconclusive; however, the historical textual analysis supports this theory. A more in-depth forensic analysis of the skull may help confirm the diagnosis.

Diagnostic yield of cerebral imaging in patients with acute confusion

OBJECTIVE

Acute confusion (AC) is a frequent reason for hospital admission in elderly patients. Although in majority of cases the cause is a systemic disorder (e.g., dehydration or septicaemia), patients are frequently subjected to cerebral imaging. This study was undertaken to find clinical predictors of normal cerebral computed tomography (CCT) or magnetic resonance imaging (MRI) scans in AC.

METHODS

Retrospective study of 294 patients admitted with AC of unknown origin, of whom 178 received cerebral imaging.

RESULTS

The rate of pathological imaging studies was 14%. The best single predictor of a normal brain scan was the absence of focal signs. Patients without focal abnormalities and either fever or dehydration had a probability of 0.96 of having a normal CCT or MRI. In demented patients without focal signs, the predictive value for a normal brain scan was 0.98, and if either patients with drowsiness were excluded or the existence of fever or dehydration was added as a selection criterion, all patients had normal scans.

CONCLUSIONS

Patients with AC without focal signs and with either evidence for a medical aetiology of delirium or prediagnosed dementia are at a very low risk of having focal lesions in their CCT or MRI.

Neurosurgery in the elderly: brain tumors and subdural hematomas

Primary malignant brain tumors present a formidable challenge to surgeons, patients, and families. Although the prognosis in elderly patients approaches only 6 months, aggressive resection and adjuvant treatment may be indicated in a select group of patients who have preserved functional status. Subdural hematomas in the geriatric population usually are chronic. Patients often benefit from evacuation but their advanced age and significant comorbidities often increase perioperative morbidity and mortality. Minimally invasive evacuation, possibly under local anesthesia, often is indicated as an initial treatment.

Differential diagnosis of dementia. The clinical process

Dementia as a syndrome must be differentiated from nondementing conditions. Dementia itself must also be differentiated as to cause, as in certain cases reversible conditions may be responsible. This article examines the clinical process of such differentiation, providing a decision free for diagnosis and a summarizing algorithm for thinking through individual cases, with a focus on the most frequent cause of dementia, Alzheimer's disease. Also outlined are the stages of Alzheimer's disease, with the admonition that variations from the expected progression may represent a dementia diagnosis other than Alzheimer's disease or the co-occurrence of some other contributing factors.