Keyword: PRES

ABSTRACT: Posterior reversible encephalopathy syndrome (PRES) is a neurological condition characterized by seizures, encephalopathy, visual disturbances, and headache, often occurring in the context of hypertension and immunosuppressive therapy after solid organ transplantation. Although classically presenting with vasogenic edema in the parieto-occipital regions, atypical patterns may also occur. Here we report our experience with a case of cyclosporine-related PRES after liver transplant and summarize PRES clinical features through a literature review.
The case was a 53-year-old man who received a deceased donor liver transplant. His initial immunosuppressive therapy comprised cyclosporine/mycophenolate mofetil/prednisolone. Five months after transplantation, he was admitted to our center with altered mental status. The patient was diagnosed with PRES based on neurological symptoms and neuroimaging findings and recovered after switching from cyclosporine to everolimus. In addition, the lowering of blood pressure with drugs reported in the literature for use in PRES proved to be effective but challenging, requiring the use of multiple agents and only slowly leading to adequate control of hypertensive peaks. Nonetheless, hypertension management and supportive therapy allowed for a complete neurological recovery of the patient.
In conclusion, cyclosporine-associated PRES has a generally favorable prognosis with early diagnosis and prompt treatment, including altering or discontinuing CNIs and controlling blood pressure. CNI-associated PRES should be considered in patients exhibiting acute neurological symptoms after transplantation. Early diagnosis and immediate treatment are critical for a favorable prognosis.

ABSTRACT: Minimal residual disease (MRD) has become a significant predictor of relapse and survival in acute myeloid leukemia (AML), indicating the extent of remission beyond traditional morphological evaluation. Although multicolor flow cytometry and quantitative PCR are essential methodologies in minimal residual disease identification, both are constrained by immunophenotypic variability, the necessity for stable molecular targets, and limited sensitivity. Advancements in next-generation sequencing (NGS) have revolutionized the minimal residual disease (MRD) field by enabling highly sensitive, mutation-driven identification of leukemic clones across a broad genomic landscape. Contemporary error-suppressed next-generation sequencing techniques—such as unique molecular identifiers, duplex sequencing, and single-molecule molecular inversion probes—have enhanced analytical sensitivity to the 10⁻⁵ to 10⁻⁶ range, enabling the detection of ultra-low-frequency variations with greater specificity. These techniques improve clinical risk classification, refine prognostication within genetically defined AML subtypes, and guide therapeutic options, including post-remission therapy, targeted inhibition, and the timing and intensity of allogeneic stem cell transplantation. Innovative applications, such as single-cell sequencing, cell-free DNA studies, and integrative multi-omic MRD evaluation, enhance the capabilities of genomics-based monitoring. Nonetheless, obstacles remain, such as differentiating cancer mutations from clonal hematopoiesis, standardizing analytical pipelines, establishing clinically relevant thresholds, and incorporating NGS MRD into standardized treatment protocols. This review encapsulates contemporary NGS methods for AML MRD diagnosis, assesses their clinical ramifications and constraints, and suggests future pathways necessary for comprehensive clinical integration. With advancements in the area, NGS-based MRD is set to become a pivotal element of precision-guided AML control.