Contrast-enhanced ultrasound in the diagnosis of a solitary neck mass: a case report of metastatic seminoma.

Seminoma accounting for approximately 98% of malignant testicular tumours and it typically presents as a painless, palpable solid mass in the testis. Seminomas presenting only as a solitary neck mass are very rare. This case report describes a previously healthy 35-year-old male that presented with a 3-month history of the incidental discovery of a mass in his right neck.

CEUS helps to rerate small breast tumors of BI-RADS category 3 and category 4.

Purpose: The primary aim of this study was to explore if classification, whether using the BI-RADS categories based on CEUS or conventional ultrasound, was conducive to the identification of benign and malignant category 3 or 4 small breast lesions.

Material And Methods: We evaluated 30 malignant and 77 benign small breast lesions using CEUS. The range of enhancement, type of enhancement strength, intensity of enhancement, and enhancement patterns were independent factors included to assess the BI-RADS categories.

[Value of contrast-enhanced sonography in early diagnosis of breast cancer].

Objective: To assess the clinical value of contrast-enhanced ultrasonography (CEUS) in early diagnosis of breast cancer.

Methods: CEUS was performed in 107 cases of ultrasound BI-RADS(®) category 3 or category 4 small breast tumors (diameter no greater than 10 mm) before surgery. The range, type and patter of enhancement of the tumor and the surrounding tissues were observed, and the time-intensity curve (TIC) was analyzed for TIC curve type, basic and peak intensity, enhancement intensity, rising slope, and enhancement intensity.

[Effect of X-ray exposure on soluble tumor necrosis factor receptor-p75 release in hepatocellular carcinoma HepG2 cells in vitro].

Objective: To investigate the effects of X-ray exposure on the release of soluble tumor necrosis factor receptor-p75 (sTNFR-p75) in hepatocellular carcinoma HepG2 cells in vitro.

Methods: Enzyme-linked immunosorbent assay (ELISA) was used to examine the levels of sTNFR-p75 in the supernatants of HepG2 cells before and after X-ray exposure. The cell apoptosis was analyzed by flow cytometry and transmission electron microscope(TEM), and the morphological changes of the cells were examined under optical microscope and transmission electron microscope(TEM).

[Expressions of tumor necrosis factor receptor I and II in human gastric carcinoma].

Objective: To study the clinical significance of expressions of tumor necrosis factor receptor I and II(TNFR I and II) and their relationship with clinical pathology in human gastric carcinoma.

Methods: SABC immunohistochemical method was used to examine the expressions of TNFR I and II in 51 cases of gastric carcinoma, 41 adjacent mucosal and 15 normal gastric mucosa tissues.

Results: The positivity rates of TNFR I and II expressions in human gastric carcinoma were significantly higher than those in the adjacent mucosal and normal mucosal tissues, and their expressions were significantly higher in the surrounding mucosa than in the normal tissues.