Publications by authors named "Mark Orloff"

Article Synopsis
  • Humans combine social info and personal preferences when making risky choices, but it's unclear how this works if personal preferences are impaired.
  • The study focused on participants with specific brain lesions while they engaged in a gambling task, involving both solo and observed choices.
  • Results showed that those with lesions were less able to use standard risk calculations and instead relied more on conforming to others' choices, suggesting that social cues can drive decisions when personal risk assessment fails.
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We report a case of a 55-year-old male with intrahepatic cholangiocarcinoma (iCCA) who underwent living donor liver transplantation (LDLT) after complete radiographic response on second-line pemigatinib. LDLT for iCCA is controversial, but recent reports have cited the potential benefit for patients with unresectable disease, especially those with disease stability after 6 months of systemic therapy. Concomitantly, genomic profiling has identified potentially treatable oncologic targets in iCCA.

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Living donor liver transplantation (LDLT) is a treatment option for select patients with unresectable colorectal liver metastasis. We describe our center's experience of patient selection, insurance approval, and outcomes after LDLT after first referral in March 2019. Of the 206 evaluated patients, 23 underwent LDLT.

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Coronavirus disease 2019-related transplant hepatic pseudoaneurysms have not been reported but can be life-threatening. They can be either solitary or multiple and can grow rapidly within weeks. They should be classified as mycotic and treated on an emergent basis.

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Humans construct cognitive maps of the physical, imagined, and abstract world around us based on visually sampled information. A new study shows how the human brain can also use olfactory cues to form and use cognitive maps.

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Introduction: Open transplant nephrectomy for failed renal allograft is an invasive procedure associated with significant perioperative morbidity and mortality. Minimally invasive surgical approaches have improved a variety of patient outcomes for many surgeries. Thus, robotic assisted transplant nephrectomy (RATN) potentially offers significant patient benefit.

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Article Synopsis
  • - The study aimed to assess the presence of hidden cancer deposits in liver transplant specimens from patients treated for colorectal liver metastases (CRLM), challenging the belief that radiographic improvements suggest complete tumor resolution.
  • - It reviewed 14 patients, revealing that despite many achieving a complete radiographic response before liver transplantation, a significant number (78.6%) still had viable tumors upon examination of explant pathology.
  • - The findings suggest that a complete radiographic response does not guarantee the absence of cancer, indicating the need for careful monitoring and treatment strategies in CRLM patients undergoing liver transplants.
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Despite strong public support, organ donor registration rates (RR) continue to lag while need only grows. In the United States, the traditional registration site is the Department of Motor Vehicles (DMV), however Primary care provider (PCP) offices have been considered as alternate locations for increasing RR. Twelve PCP offices across 2 New York Counties were subjected to a control week where participants received only a registration opportunity and an intervention week with the addition of a motivational poster and informational brochure.

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Importance: Colorectal cancer is a leading cause of cancer-related death, and nearly 70% of patients with this cancer have unresectable colorectal cancer liver metastases (CRLMs). Compared with chemotherapy, liver transplant has been reported to improve survival in patients with CRLMs, but in North America, liver allograft shortages make the use of deceased-donor allografts for this indication problematic.

Objective: To examine survival outcomes of living-donor liver transplant (LDLT) for unresectable, liver-confined CRLMs.

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Article Synopsis
  • - Enhanced recovery after surgery (ERAS) protocol for liver resection shows improved outcomes, including significantly shorter hospital stays (5.1 days vs. 7.3 days) without increasing complications or readmissions.
  • - The study found that compliance with specific ERAS components, such as early diet resumption, fluid management, and ambulation, is linked to shorter hospital stays and fewer complications.
  • - Achieving at least six ERAS components by postoperative day three was associated with better recovery, indicating that adherence to these guidelines can be crucial for minimizing length of stay and complications after liver surgery.
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Social influences on decision-making are particularly pronounced during adolescence and have both protective and detrimental effects. To evaluate how responsiveness to social signals may be linked to substance use in adolescents, we used functional neuroimaging and a gambling task in which adolescents who have and have not used substances (substance-exposed and substance-naïve, respectively) made choices alone and after observing peers' decisions. Using quantitative model-based analyses, we identify behavioral and neural evidence that observing others' safe choices increases the subjective value and selection of safe options for substance-naïve relative to substance-exposed adolescents.

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Causal inference for treatments with many versions requires a careful specification of the versions of treatment. Specifically, the existence of multiple relevant versions of treatment has implications for the selection of confounders. To illustrate this, we estimate the effect of organ transplantation using grafts from donors who died due to anoxic drug overdose, on recipient graft survival in the US.

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Outcomes for adult-to-adult living liver donors (LDs) are largely based on short-term data drawn from single-center studies. The aim of this study was to determine how living liver donation (LLD) impacts self-reported quality-of-life (QOL) up to 6 years after donation in a sample of residents from New York State. New York transplant programs are state-mandated to track LDs as part of a quality assurance and patient safety effort.

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Context: Liver cancers (including hepatocellular carcinoma [HCC] and cholangiocarcinoma) are the fifth most common cause of cancer death. The most powerful independent histologic predictor of overall survival after transplantation for HCC is the presence of microscopic vascular invasion (VI).

Aims: Given that VI is known to have somewhat high interobserver variability in both HCC and other tumors, we hypothesized that pathologists with special interest and training in liver pathology would be more likely to identify and report VI in HCC than would general surgical pathologists.

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Introduction: Understanding living organ donors' experience with donation and challenges faced during the process is necessary to guide the development of effective strategies to maximize donor benefit and increase the number of living donors.

Methods: An anonymous self-administered survey, specifically designed for this population based on key informant interviews, was mailed to 426 individuals who donated a kidney or liver at our institution. Quantitative and qualitative methods including open and axial coding were used to analyze donor responses.

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Purpose: Biliary complications following liver transplantation are a significant source of morbidity, potentially leading to graft failure necessitating retransplantation. We sought to evaluate smoking as an independent risk factor for post-transplant biliary complications.

Methods: The clinical course of all adult primary deceased donor liver transplants at our center from 1992 to 2012 was reviewed.

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Purpose: To evaluate and compare outcome of stereotactic body radiation therapy (SBRT), yttrium-90 radioembolization, radiofrequency ablation (RFA), or transarterial chemoembolization (TACE) as bridge to liver transplant (LT) in patients with hepatocellular carcinoma.

Methods And Materials: We retrospectively reviewed patients treated at our institution with SBRT, TACE, RFA, or yttrium-90 as bridge to LT between 2006 and 2013. We analyzed radiologic and pathologic response and rate of failure after bridge therapy.

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Background: In 1994, the authors reported their experience with radical esophagogastrectomy for bleeding esophagogastric varices due to unshuntable extra-hepatic portal hypertension. Since then, the series has expanded from 22 to 44 patients. The aim of this study was to assess the validity of the previous observations and conclusions in the largest series with the longest follow-up.

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Background: Diabetes mellitus (DM) is identified as a negative prognostic indicator in hepatocellular carcinoma (HCC), though the basis for this is unknown.

Methods: This is a retrospective analysis of a prospectively collected database of 191 HCC patients treated at the University of Rochester Medical Center (URMC) with orthotopic liver transplantation between 1998-2008. Clinical characteristics were compared between patients with and without DM prior to liver transplantation and logistic regression analyses were conducted to assess the effect of DM on clinical outcomes including vascular invasion.

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Invasive fungal infections (IFIs) are associated with a high mortality rate for liver transplantation (LT) recipients. To study the incidence of and risk factors for IFIs in LT recipients and the associated mortality rates, we retrospectively reviewed the records of first-time deceased donor LT recipients (January 2003 to December 2007). The incidence of IFIs was 12%.

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Hepatitis C virus (HCV) chronic infection is characterized by low-level or undetectable cellular immune response against HCV antigens. HCV proteins affect various intracellular events and modulate immune responses, although the mechanisms that mediate these effects are not fully understood. In this study, we examined the effect of HCV proteins on the differentiation of human peripheral blood monocytes to dendritic cells (DCs).

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Natural killer (NK) cells are a component of innate immunity against viral infections through their rapid cytotoxic activity and cytokine production. However, intra-hepatic NK cells' ability to respond to virus is still mostly unknown. Our results show that the synthetic dsRNA polyinosinic-polycytidylic acid (poly I:C), a mimic of a common product of viral infections, activates NK cells directly in the context of cytokines found in the liver, i.

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Background: Hepatitis C virus (HCV) recurrence is universal after liver transplantation (LT). Whether the progression of recurrent HCV is faster after live-donor LT (LDLT) compared with deceased-donor LT (DDLT) is debatable.

Methods And Results: We retrospectively examined 100 consecutive LTs (65 DDLTs and 35 LDLTs) performed between July 2000 and July 2003.

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