Email updates

Keep up to date with the latest news and content from Diagnostic Pathology and BioMed Central.

Open Access Research

Adrenal cortical neoplasms: a study of clinicopathological features related to epidermal growth factor receptor gene status

Jing Zhang, Cuiping Wang, Jie Gao, Jian Sun, Xuan Zeng, Shafei Wu and Zhiyong Liang*

Author Affiliations

Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Shuai Fu Yuan Hu Tong, Beijing 100730, People’s Republic of China

For all author emails, please log on.

Diagnostic Pathology 2014, 9:19  doi:10.1186/1746-1596-9-19

Published: 23 January 2014

Abstract

Background

Adrenocortical carcinoma (ACC) is a rare but highly malignant neoplasm with limited treatment options.

Methods

In this study, the clinicopathological features of 22 ACCs and 22 adrenocortical adenomas (ACA) were analyzed, and the EGFR protein expression, EGFR gene mutation status and EGFR gene copy number alteration of all tumors were examined using immunohistochemistry, fluorescence in situ hybridization (FISH), and the Scorpion Amplification Refractory Mutation System (ARMS), respectively.

Results

EGFR protein expression was detected in 63.6% of the ACC samples, and EGFR FISH was positive in 50% of the ACC samples (all were high polysomy on chromosome 7). In contrast, 27.3% of the ACA samples demonstrated EGFR expression, and none of the ACA samples tested positive by FISH. There were significant differences between the ACC and ACA in terms of protein expression (P = 0.035) and gene copy number alterations (P < 0.001).

Conclusions

EGFR protein expression and high polysomy on chromosome 7 are frequent abnormalities in ACC than in ACA.

Virtual slides

The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/2068470757103500 webcite.

Keywords:
Adrenal cortical neoplasm; Epidermal growth factor receptor; Fluorescence in situ hybridization; Mutation