Publications by authors named "Hans F Schoellhammer"

Background: Melanoma of unknown primary (MUP) accounts for approximately 3% of melanoma diagnoses. This study sought to evaluate treatment and outcomes for a modern MUP cohort.

Methods: A retrospective review of MUP was performed at a tertiary referral cancer center.

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Purpose: Enhanced recovery after surgery (ERAS) protocols for gastric cancer patients have shown improved outcomes in Asia. However, data on gastric cancer ERAS (GC-ERAS) programs in the United States are sparse. The purpose of this study was to compare perioperative outcomes before and after implementation of an GC-ERAS protocol at a National Comprehensive Cancer Center in the United States.

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Liver resection for noncolorectal, nonneuroendocrine metastases remains controversial. Here, we evaluate a single institutional experience with hepatic resection for metastatic urologic malignancies. A single-institution review of patients who underwent hepatic resection for metastatic urologic tumors between the years of 2000 and 2013 was performed.

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The impact on survival of a second primary melanoma (SPM) is unclear. We used our melanoma center's database to examine clinicopathologic risk factors and outcomes of stage 0 to IV cutaneous melanoma in patients with one versus two primaries. Among 12,325 patients with primary melanoma, 969 (7.

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Aim: To predict node-positive disease in colon cancer using computed tomography (CT).

Methods: American Joint Committee on Cancer stage I-III colon cancer patients who underwent curavtive-intent colectomy between 2007-2010 were identified at a single comprehensive cancer center. All patients had preoperative CT scans with original radiology reports from referring institutions.

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Pancreatic adenocarcinoma is the most common pancreatic malignancy, and it occurs most commonly in the pancreatic head. It has a relatively low incidence; however it is a deadly disease and is the fourth most common cause of cancer deaths for males and females in the United States. Surgical resection in the form of pancreaticoduodenectomy is the mainstay of treatment and can lead to improved overall survival as well as the possibility of a cure, although only 10 % of patients are resectable at presentation.

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Background: Irreversible electroporation (IRE) is a non-thermal injury tissue ablation technique that uses electrical pulses to cause cell death. IRE damages the endothelial cells of blood vessels; however these cells re-grow, and thus IRE does not result in permanent damage to blood vessels. We report the novel use of IRE for ablation of microscopically positive margins after resection of colorectal liver metastases (CRLM) impinging on hepatic veins.

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Pancreatic resections are some of the most technically challenging operations performed by surgeons, and post-operative pancreatic fistula (POPF) are not uncommon, developing in approximately 13% of pancreaticoduodenectomies and 30% of distal pancreatectomies. Multiple trials of various operative techniques in the creation of the pancreatic ductal anastomosis have been conducted throughout the years, and herein we review the literature and outcomes data regarding these techniques, although no one technique of pancreatic ductal anastomosis has been shown to be superior in decreasing rate of POPF. Similarly, we review the literature regarding techniques of pancreatic closure after distal pancreatectomy.

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Background: Although breast cancer frequently metastasizes to the bones and brain, rarely breast cancer patients may develop isolated liver metastasis. There is increasing data that anti-HER2 targeted therapy in conjunction with systemic chemotherapy may lead to increased rates of pathologic complete response in the primary breast cancer. However, little is known about its effects on metastatic liver disease.

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Current concepts in the management of hepatic metastases have changed dramatically over the past two decades. Multidisciplinary therapies including chemotherapy, surgery, and regional therapy have alone and in combination significantly improved the survival of patients with metastatic colorectal cancer. Conditions that were previously considered hopeless and treated merely for palliation can now be approached with curative intent.

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Background: The annual incidence of inflammatory breast cancer (IBC) in the United States reportedly increased during the last quarter of the twentieth century. We investigated whether that increase has continued into the twenty-first century.

Methods: We queried the Surveillance Epidemiology and End Results database for all cases of IBC in women age 20 and older between 1992 and 2009.

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Colorectal cancer is a common and significant public health concern. The liver is the most common site of metastasis, and colorectal cancer liver metastases (CRLM) may affect up to 60% of patients at some time during the course of their disease. Approximately 25% of patients are found to have synchronous CRLM at the time of diagnosis, and these patients have a worse prognosis than those who develop metastases later in their disease course.

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Colorectal cancer (CRC) is a leading worldwide health concern that is responsible for thousands of deaths each year. The primary source of mortality for patients with CRC is the development and subsequent progression of metastatic disease. The most common site for distant metastatic disease is the liver.

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Gastrointestinal stromal tumors (GISTs) in adolescence are far less common than adult GISTs and have varied GIST genotypes that present diagnostic and therapeutic challenges. Here, we discuss a 21-year-old male with diagnosis of unresectable, imatinib-resistant GIST. At initial evaluation, a neoadjuvant treatment approach was recommended.

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Background: The benefit of adjuvant radiotherapy (RT) in elderly breast cancer patients is debatable. The purpose of this study was to evaluate trends in RT rates after breast-conserving surgery.

Methods: Breast cancer patients ≥70 years treated from 2000 to 2009 were identified using the Surveillance, Epidemiology, and End Results (SEER) database.

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Melanoma-associated chondroitin sulfate proteoglycan (MCSP; also called HMW-MAA, CSPG4, NG2, MSK16, MCSPG, MEL-CSPG, or gp240) is a well characterized melanoma cell-surface antigen. In this study, a new bispecific T-cell engaging (BiTE) antibody that binds to MCSP and human CD3 (MCSP-BiTE) was tested for its cytotoxic activity against human melanoma cell lines. When unstimulated peripheral mononuclear blood cells (PBMCs) derived from healthy donors were cocultured with melanoma cells at effector:target ratios of 1:1, 1:5, or 1:10, and treated with MCSP-BiTE antibody at doses of 10, 100, or 1000 ng/mL, all MCSP-expressing melanoma cell lines (n=23) were lysed in a dose-dependent and effector:target ratio-dependent manner, whereas there was no cytotoxic activity against MCSP-negative melanoma cell lines (n=2).

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Background: Colonoscopic localization of rectal and rectosigmoid tumors may be inaccurate. Rigid proctosigmoidoscopy has been suggested as an adjunctive technique to accurately localize rectal tumors as it may alter treatment options.

Methods: A retrospective review was performed of patients with rectal and rectosigmoid cancer from 2001 to 2006.

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