[Subepithelial tumors of the gastrointestinal tract].

The subepithelial lesions of the gastrointestinal tract are related to mesenchymal tumors and 80% of them are GIST (gastrointestinal stromal tumors). However, there are also other tumors, such as: leiomyomas, schwannomas, lipomas, glomus tumors, carcinoid tumors, aberrant pancreas and polyps or inflammatory tumors. Diagnosis of submucosal tumors is often performed during routine endoscopic examination, they are frequently located at the stomach and in most cases are clinically evidenced by their complications.

[Lung cancer in patients infected with human immunodeficiency virus. Clinical course and therapeutic implications].

Objectives: HIV infection is associated with increased frequency of non-Hodgkin's lymphoma and Kaposi sarcoma. Like other malignancies, lung cancer has been described in HIV-infected patients although no evidence of a statistical correlation has been reported.

Patients And Methods: We performed a retrospective analysis of 15 HIV-infected patients with lung cancer.

[Ultrasonography of the parotid venous plane].

The venous plane of the parotid gland is a good marker of the intraparotid facial nerve that no imaging method can display precisely. In our study, we performed conventional B-mode imaging, color Doppler and power Doppler to detect the venous plane of the parotid. Some healthy patients (one hundred forty-two) without head or neck disease were examined with color Doppler and Power Doppler sonography using a 10 Mhz transducer.