PHOTORECEPTOR DAMAGE IN TERSON SYNDROME.

PURPOSE: To describe photoreceptor damage in patients with Terson syndrome as a potential cause for inconsistent clinical outcomes. METHODS: Clinical evaluation and retinal imaging in six patients. RESULTS: Four patients were women and two men, with an average age of 46.8 years (SD 8.9). Four patients suffered aneurysmal subarachnoid hemorrhage, one vertebral artery dissection, and one superior sagittal sinus thrombosis. In 11 eyes, a consistent pattern of outer retinal changes within the central retina affecting the ellipsoid zone and the outer nuclear layer was observed, indicating photoreceptor damage. Areas of photoreceptor damage showed poor spatial correlation with intraocular hemorrhage, particularly subinternal limiting membrane hemorrhage. The observed retinal abnormalities demonstrated incomplete recovery over long-term follow-up 3.5 to 8 years posthemorrhage, irrespective of surgical or conservative treatment strategy, and had variable impact on the patients' visual function. CONCLUSION: The observations suggest that photoreceptor damage in Terson syndrome likely represents a distinct manifestation of this condition, which could be caused by transient ischemia of the outer retina secondary to acute rise in intracranial pressure.

At the limits of patient autonomy: an ethical re-evaluation of coroner's postmortems.

Patient autonomy is one of the four pillars of modern medical ethics. In some cases, however, its value is not absolute and autonomy may be overridden by sufficiently important matters of public interest. Coroner's autopsies represent an example of when the wishes of the deceased and their family may come in conflict with the benefits of knowledge gained from understanding the cause of death. Current legislation governing coroner's autopsies relies on the assumption of their obvious public benefit, hence consent for them need not be sought. This interpretation has attracted controversy, as exemplified by the case of Rotsztein vs HM Senior Coroner and a recent study questioning the prevalent use of invasive autopsy. However, this issue has received little recent attention in ethical literature. In this essay, the ethical nature of coroner's autopsies in cases of natural deaths with unexplained causes is examined as a balance between patient autonomy and the value of knowledge gained from them. This is done by analysing a case which under current legislation warrants coroner's autopsy, however, its ethical justification remains contentious. This discussion is expanded by discussion of non-invasive alternatives and comparison to another situation which balances individual autonomy with public benefits-organ donation. The conclusion of this analysis is a moral middle ground in which objection to invasive autopsy could be respected once issues of overriding public interest are excluded, or at least non-invasive alternatives should be considered, with coroners left responsible for demonstrating specific public needs that could override objection.

The Gut Microbiome and Schizophrenia: The Current State of the Field and Clinical Applications.

Schizophrenia is a debilitating psychiatric disorder, leading to both physical and social morbidity. Despite its importance, the etiology of schizophrenia remains poorly understood. Furthermore, its mainstream treatments fail to address all aspects of the disorder and are associated with significant side-effects. Recently, there has been growing interest in the relationship between the gut microbiome and mental health, including in schizophrenia. In this article, we review the existing evidence implicating dysbiosis in schizophrenia and discuss how the presumed dysbiosis could fit within known hypotheses of its pathogenesis, focusing on inflammation, tryptophan metabolites, and BDNF levels. We also evaluate the clinical potential of manipulating the gut microbiome with probiotics and prebiotics as adjunctive treatments in schizophrenia, based on existing clinical and pre-clinical studies. Overall, the current data showing microbiome alterations in schizophrenia are highly discrepant and insufficient to conclude whether microbiome changes are associated with increased risk of the disorder, or are simply the result of external factors or treatment. Despite some encouraging results of pro/prebiotic supplementation, there is also inconclusive evidence for their efficacy in schizophrenia. Thus, further research and more clinical trials are needed to test the validity of manipulating the gut microbiome to improve the treatment of this disorder.