Browsing by Author "Valderrama, Sebastian"

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    Endoscopic band ligation versus propranolol for the primary prophylaxis of variceal bleeding in cirrhotic patients with high risk esophageal varices
    (ELSEVIER ESPANA, 2010) Maria Perez Ayuso, Rosa; Valderrama, Sebastian; Espinoza, Manuel; Rollan, Antonio; Sanchez, Rene; Otarola, Francisco; Medina, Brenda; Riquelme, Arnoldo
    Background. Gastroesophageal variceal bleeding is a common complication of portal hypertension. Current guidelines recommend beta -blockers for primary prophylaxis. However, evidence suggests that endoscopic variceal ligation (EVL) reduce bleeding episodes. Aims. To compare endoscopic EVL with propranolol (PPL) for primary prophylaxis of variceal bleeding. Methods. We conducted a randomized controlled trial. Over a 9-year period, 75 patients with cirrhosis and high-risk esophageal varices (HREV) were recruited and allocated to EVL (n=39) or PPL (n=36). Primary outcome was variceal bleeding. Secondary outcomes were survival, source of bleeding and serious adverse events. Analyses were made by intention-to-treat. Results. Baseline characteristics were similar. Medium follow-up was 1647 1096 days. Complete follow-up was achieved in 85% of patients. Variceal bleeding occurred in 12% of EVL and in 25% of PPL group (p=0.17). The actuarial risks of bleeding after 2 years were similar in both groups. Overall mortality was 51% in EVL and 33% in PPL group (p=0.17). Patients in the EVL group showed a lower rate of esophageal variceal bleeding (5.1% v/s 25%, p=0.027) and a higher rate of subcardial variceal bleeding compared with PPL group (7.7% v/s 0%, p=0.027). Serious adverse events related to EVL occurred in 2 patients, including 1 death. Conclusions. The present study supports that PPL should be considered the first choice in primary prophylaxis of variceal bleeding offering similar effects and tower severe adverse events compared with EVL.
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    Thalidomide for the treatment of metastatic hepatic epithelioid hemangioendothelioma: A case report with a long term follow-up
    (ELSEVIER ESPANA, 2011) Salech, Felipe; Valderrama, Sebastian; Nervi, Bruno; Carlos Rodriguez, Juan; Oksenberg, Danny; Koch, Alvaro; Smok, Gladys; Duarte, Ignacio; Maria Perez Ayuso, Rosa; Jarufe, Nicolas; Martinez, Jorge; Soza, Alejandro; Arrese, Marco; Riquelme, Arnoldo
    Hepatic epithelioid hemangioendothelioma (HEH) is an unusual, low-grade malignant vascular tumor of the liver. Here we describe a case of a 40-year-old woman who presented with abdominal pain in the upper right quadrant and giant hepatomegaly, in which imaging studies and a fine-needle liver biopsy confirmed the presence of a large EHE with an isolated lung metastasis. After balancing all possible therapeutic modalities the patient was treated conservatively with thalidomide (300 mg/day). The drug was well tolerated with minimal toxicity and the patient continues on therapy 109 months after treatment was started with no disease progression. Current therapeutic options for HEH are discussed in light of the clinical case with particular emphasis on anti-angiogenic therapies.
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    Value of adenosine deaminase (ADA) in ascitic fluid for the diagnosis of tuberculous peritonitis - A meta-analysis
    (LIPPINCOTT WILLIAMS & WILKINS, 2006) Riquelme, Arnoldo; Calvo, Mario; Salech, Felipe; Valderrama, Sebastian; Pattillo, Alejandro; Arellano, Marco; Arrese, Marco; Soza, Alejandro; Viviani, Paola; Letelier, Luz Maria
    Background and Goals: Adenosine deaminase (ADA) levels are used for diagnosing tuberculosis in several locations and although many studies have evaluated ADA levels in ascitic fluid. These studies have defined arbitrary cut-off points creating difficulties in the clinical application of the results. The goals of this study are: to determine the usefulness of ADA levels in ascitic fluid as a diagnostic test for peritoneal tuberculosis (PTB) and define the best cut-off point.