Publications by authors named "Alejandro Yabar"

Introduction: Epstein-Barr virus (EBV) infection has been linked to cervical cancer (CC), but few have described the clinical and outcome features of patients with CC and EBV infection.

Methods: We conducted a single-center matched cohort study on 94 patients with CC. Real-time Polymerase chain reaction (RT-PCR) was used to detect (Epstein-Barr nuclear antigen 1) and (Latent membrane protein 1).

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Duodenal type follicular lymphoma is a rare malignancy accounting for less than 4% of primary non-Hodgkin lymphomas of the gastrointestinal tract and it is a new entity that was recently described in the new update WHO 2016. Data regarding long-term outcome are currently lacking, and for that reason, a consensus on the management of this disease has not been established and treatment. We report a case of a 57-year-old female patient diagnosed with duodenal- type follicular lymphoma grade 3a who was treated with R-CHOP.

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Breast cancer (BC) is a heterogeneous disease composed of four main subtypes with distinct clinical and epidemiological features. Although several reports have described the distribution of BC subtypes in Latin America, the majority of them have not included the cellular marker, Ki-67, in the immunohistochemical (IHC) panel. The aim of the present study was to describe the distribution of BC subtypes in a cohort of Latin American women using an IHC panel with Ki-67.

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Introduction: Solid pseudopapillary tumors (SPT) of the pancreas are rare neoplasms of low malignant potential that typically affect young women. These are slow-growing lesions and very often reach large size.

Results: Between June 2003 and July 2013 24 patients were submitted to surgery.

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Primary cardiac neoplasms are rare. However, among them, cardiac myxoma is the most common tumor. In contrast, primary cardiac lymphoma within a cardiac myxoma is extremely rare and might be difficult to diagnose because of non-specific clinical manifestations.

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Unlabelled: We report the case of female patient, 34 years old, occupation Secretary.

Background: Polycystic ovary and chronic anemia. No family history of cancer.

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Objective: To determine the clinical, radiological, histopathological manifestations and survival of patients with gastrointestinal stromal tumor (GIST) in the National Hospital Edgardo Rebagliati Martins (HNERM) from Lima, Perú.

Material And Methods: This is a descriptive and retrospective study, which was based on the medical records of 103 patients with confirmed GIST with immunohistochemical. All the patients were evaluated and treated at the HNERM, from January 2002 until December 2010.

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Primary cardiac osteosarcoma is a rare and aggressive neoplasm that can be difficult to diagnose. We report a case of a previously healthy 49-year-old woman who presented with dyspnea, atrial flutter, and heart failure. A mass was visualized in her left atrium by echocardiography and cardiac computed tomography, and the diagnosis of cardiac myxoma was raised.

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Background: US-guided hepatico - gastrostomy, choledocho-duodenostomy and choledocho-antrostomy are advanced procedures on biliary and pancreatic endoscopy and together make up the echo-guided biliary drainage. Hepatico - gastrostomy is indicated in cases of hiliar obstruction, while the procedure of choice is choledocho - duodenostomy in distal lesions. Both procedures must be done only after unsuccessful ERCP.

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A male patient, 55 years old, born in Ayacucho, with Spanish ancestors, was hospitalized through emergency referring abdominal pain, and 10 kilograms weight loss. Six months before he was diagnosed as having irritable bowel syndrome. His previous diseases were rheumatoid arthritis and intolerance to lactose.

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Introduction: There is epidemiologic evidence that suggest the relation between the histological type and location of gastric adenocarcinoma. Knowing that there is a predominance of Helicobacter pylori infection in the antral region and this is considered an environmental factor; make us suppose that there is a relation among intestinal type and distal location.

Objective: The aim of this study is to investigate the relation among histological type and location of gastric cancer, using the Lauren classification and the Japanese Gastric Cancer Association classification.

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Introduction: Gastrointestinal Stromal Tumors (GIST) are lesions which origin from Intersticial Cells of Cajal that may be asymptomatic or cause complications like digestive bleeding or malignant transformation.

Aim: To determine the clinical, endoscopic and histological profile, as well as the main demographic features of patients with GIST in Hospital Edgardo Rebagliati (Lima-Perú) from January 2002 to December 2004.

Methods: Descriptive, transversal and retrospective study in which we reviewed clinical and anatomopathological archives from 34 patients with GIST during the above mentioned period.

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We report the case of 48 year old female patient without a history of significance importance.(refuses blood transfusion). She complaint of diarrhea of four months of duration and weight loss of 8 kg.

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This report describes the characteristics of early gastric cancer surgically treated in the Gastric Cancer Unit at Rebagliati National Hospital between January 2004 and December 2008. Mean age was 68 years; males, distal location, submucosa infiltration and intestinal histological type predominate in these patients. Lymph node involvement was 13%.

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The peritoneal mesothelioma is a rare pathology with unspecific symptoms reason to be a difficult diagnosis. We report a case of a 58 year old man with diabetes mellitus type 2, arterial hypertension and smoking; without precedent of asbestos exposure. The patient presented a one month history characterized by progressive increase of the abdominal volume and sensation of fullness; three weeks later they added breathlessness and hyporexia.

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Although the International Prognostic Index (IPI) score is a valuable prognostic tool in diffuse large B-cell lymphoma (DLBCL), other risk-stratifying factors may be of value. The aim of this study was to define the prognostic value of EBV expression in de novo nodal DLBCL. Seventy-four cases were selected between January 2002 and December 2007.

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We review the case of a 14 year old patient complaining of 5 months of bloody and mucous diarrhea, abdominal pain, fever and 10 kg weight loss. At the beginning she received cotrimoxazole and then chloramphenicol with no success. With the suspicious of tuberculosis she was treated for a month with the corresponding drugs with no clinical improvement.

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Primary colorectal lymphoma is a very rare disease. Primary colorectal lymphoma of diffuse large B-cells is a more frequent subtype representing 1% of all colon diseases. In a retrospective study, the clinical characteristics and treatment course of primary colorectal lymphoma of diffuse large B-cells between 1997 and 2003 were reviewed.

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Spontaneous regression of malignant tumors is a rare event. It is defined as partial or total disappearance of a proven malignant tumor without adequate medical treatment. The causes of this phenomenon are various.

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This report describes the case of a patient who underwent total gastrectomy, splenectomy and pancreatomy corporo-postero as a consequence of gastric and pancreatic metastasis from carcinoma to clear cells, five years after having undergone radical nephrectomy. Upper digestive bleeding was the first symptom, and pancreatic lesion was detected in previous CT scans. There are many documented cases of pancreatic metastasis, but only eight gastric metastasis in the last 15 years, although we did not find reports about surgical treatment for concomitant gastric and pancreatic injury.

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The Vater's ampulla neoplasias are not very frequent lesions. The ampullectomy consists on the total resection of the Vater's ampulla and part of the duodenal wall with the later reconstruction and anastomosis of the common bile duct and the Wirsung's duct to the duodenum. The local resection of the ampulla is an alternative to the duodenopancreatectomy that has to be taken into account, especially in benign lesions as in the case of adenomas of the Vater's ampulla.

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Chronic liver disease is a clinical entity of different origins. It is most frequently caused by viral infection and alcohol consumption. The entities of immunological origin are listed in third place including autoimmune hepatitis, primary biliar cirrhosis, primary sclerosing cholangitis, as well as superposition syndromes.

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We report a human case of polycystic hidatidosis due to Echinococcus vogeli from Contamana (Department of Loreto) village located in the central jungle of Peru. The patient is a 44 year-old lady, teacher, who carried a painless liver mass since a year ago. She was submitted to abdominal surgery and the liver mass was removed and showed multiple cysts containing colorless liquid as is showed in the polycystic hidatidosis.

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Fibrovascular polyps are extremely rare benign neoplasias of the esophagus, which usually originate in the lower cricoid area. They do not produce any discomfort in the patient for a long time, however it may make itself evident by the patient's regurgitation of the polyp, producing asphyxia or, more frequently, dysphagia. The case of a 58 year old male patient is presented herein, with a 9 month record of dysphagia, weight loss and intermittent melena.

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