[Ablation of malignant liver tumors with radiofrequency. A series of cases in Mexico.].

Background: Surgical resection is the treatment of choice for most of the primary and secondary liver tumors, unfortunately, many patients are not suitable for resection. Several ablative alternatives have been employed for treatment; the most commonly used has been radiofrequency ablation.

Objective: To establish the safety and results of treatment with radiofrequency ablation (RF) of malignant liver tumors.

[Radical surgical treatment of a new neuroendocrine tumor of the ileocecal valve with liver metastasis and carcinoid syndrome].

Background: Neuroendocrine tumors are rare neoplasms which have a slow growth pattern. When liver metastases are diagnosed, treatment is controversial and it is focused in symptomatic control.

Aim: To present a patient with a neuroendocrine tumor that arised from the ileocecal valve and it was diagnosed with carcinoid syndrome and treated with radical liver and colonic resection.

Intraoperative US-guided large volume ethanol injection for hepatocellular carcinoma greater than 4 cm.

Background: Percutaneous ethanol injection has been successfully used for hepatocellular carcinomas (HCC) smaller than 5 cm in size. For larger lesions large volume ethanol injection has not been well explored.

Aim: Evaluate the results of intraoperative Ultrasonographic-guided large volume ethanol injection for HCC larger than 4 cm in size.

[Surgical management of gallstone ileus: fourteen year experience].

Aim: The aim of this study is to describe our experience in the diagnosis and treatment of gallstone ileus, as well as the morbility and mortality associated to this pathology.

Background: The first description of gallstone ileus was made by Bartholin in 1645 during a post-mortem study. It is a rare pathology, the preoperative diagnosis is difficult and controversy exists in the management that should be carried out on first instance, whether the extraction of the gallstone or the correction of the fistula which can affect outcome.

[Paragangliomas: clinical and secretory profile. Result of 39 cases].

This Retrospective Study Aims: To define a clinical and secretory profile of paragangliomas extra-adrenal chromaffin tumors.

Methods: From 1971 throughout 2002, 39 paragangliomas have been observed in 38 patients (22 male, 16 female, average age 41,2 years).

Results: Four were located above the diaphragm, 35 were sub-phrenic (6 of the organ of Zuckerkandl), 32 secreted catecholamines, 23 were hypertensive (with only one without hypersecretion of catecholamines).