PRES in Anuric Patient with WT1 Mutation and Renal Graft Failure: A Case Report

A case report published in Cureus describes a patient with a WT1 mutation and chronic renal graft failure who developed Posterior Reversible Encephalopathy Syndrome (PRES), a neurological condition characterized by brain swelling that typically occurs in the posterior regions of the brain. The patient, who was anuric—meaning they produced no urine—experienced the syndrome as a complication of severe kidney dysfunction and systemic instability.

According to the report, PRES often manifests as seizures, headache, visual disturbances, and altered mental status. In this specific instance, the patient’s underlying genetic mutation in the WT1 gene and the failure of a transplanted kidney created a high-risk environment for the development of the syndrome.

The Role of WT1 Mutation and Renal Failure in PRES

The WT1 gene provides instructions for making a protein that is critical for the normal development of the kidneys and the genital system. Mutations in this gene can lead to various renal disorders and an increased predisposition to certain cancers, according to the Cureus report.

In the reported case, the patient suffered from chronic renal graft failure, leading to an anuric state. When the kidneys fail to remove excess fluid and toxins from the blood, the resulting imbalance can trigger a breakdown in the blood-brain barrier. The report indicates that this breakdown allows fluid to leak into the brain tissue, causing the vasogenic edema associated with PRES.

Medical literature cited in the case report suggests that hypertension and acute kidney injury are common triggers for PRES. The inability to regulate fluid volume in an anuric patient significantly increases the risk of hypertensive crises and cerebral edema.

Diagnosis and Clinical Manifestations

Diagnosis of PRES typically relies on Magnetic Resonance Imaging (MRI), which can identify the characteristic swelling in the posterior cerebral regions. The Cureus report notes that the “reversible” nature of the syndrome means that the neurological deficits and imaging findings can resolve if the underlying cause—such as kidney failure or high blood pressure—is treated promptly.

The patient in this report presented with symptoms consistent with the syndrome’s typical progression. These often include:

• Acute onset of seizures or tremors.
• Visual impairment, including cortical blindness or blurred vision.
• Severe headaches.
• Confusion or decreased levels of consciousness.

The report emphasizes that because PRES can mimic other conditions, such as stroke or metabolic encephalopathy, rapid imaging is necessary to differentiate the swelling from a permanent infarct or bleed.

Management of PRES in Anuric Patients

Management of the condition focuses on stabilizing the patient’s systemic health to allow the brain swelling to subside. For an anuric patient, this primarily involves aggressive fluid management and blood pressure control.

The Cureus report highlights the necessity of dialysis or ultrafiltration to remove excess fluid from the body, which helps reduce the pressure within the cranium. Controlling blood pressure is equally critical to prevent further leakage through the blood-brain barrier.

The report indicates that once the primary trigger—in this case, the complications of renal graft failure—is managed, the neurological symptoms of PRES typically improve. However, the long-term prognosis for the patient is heavily dependent on the stability of their renal function and the management of the WT1-related complications.

Clinical Significance of the Case

This case adds to the medical understanding of how rare genetic mutations, like those in the WT1 gene, can intersect with organ transplant failure to produce acute neurological emergencies. It underscores the need for clinicians to consider PRES in patients with severe kidney dysfunction who present with sudden neurological changes.

The report concludes that early recognition and the immediate correction of fluid and pressure imbalances are the most effective ways to prevent permanent neurological damage in patients suffering from this syndrome.