[Primary gastric lymphoma].

Primary gastric lymphoma derives from a secondary MALT system developing after a reaction of the immune system, e.g. following chronic gastritis induced by Helicobacter pylori.

[Endoscopic ultrasound in routine clinical practice for staging adenocarcinomas of the stomach and distal esophagus].

Problem: Endoscopic ultrasound (EUS) is an important diagnostic tool for determining the best therapeutic strategy (primary resection, neoadjuvant therapy or palliation only) to offer esophageal or gastric cancer patients.

Patients And Methods: In the present study (1992-2001),we evaluated the accuracy of EUS in adenocarcinomas of the distal esophagus and stomach and compared our results with pathologists findings as the gold standard.

Results: Of the 222 patients studied, the precise examination of 11% EUS was not completely possible due to severe tumor stenosis.

Laser-induced interstitial thermotherapy of liver metastases in an interventional 0.5 Tesla MRI system: technique and first clinical experiences.

Laser-induced interstitial thermotherapy (LITT) surveyed by magnetic resonance imaging (MRI) has been shown to be effective in various applications. The laser treatment of colorectal liver metastases usually requires a separate device (e.g.

[Principles of surgical management of stromal tumor].

Gastrointestinal stromal tumors (GIST) have been regarded as rare tumor manifestations of the mesenchymal tissue fraction of the intestinal building principle; however, this tumor is now established as an independent tumor entity owing to independent immunohistochemical and ultrastructural characteristics. In spite of increasing awareness of their biological behavior and their molecular-biological basis, evaluating the grade of many of these tumors remains open, not only on a preoperative but also on a postoperative basis. Thus, how radical the surgical procedure must be is not standardized, as it is in carcinoma surgery.