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Reports outline adenocarcinoma study findings from C.J.R. Stewart and colleagues



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2008 JAN 13 -- In this recently published article, scientists in Perth, Australia conducted a study "To determine the frequency of endocrine cell micronests ( ECM) and single endocrine cells ( SEC) within the glandular mucosa of the distal oesophagus and oesophagogastric junction ( OGJ) following neo- adjuvant therapy for adenocarcinoma. The resection specimens from 11 patients with adenocarcinoma of the distal oesophagus or OGJ who had undergone preoperative chemotherapy or chemoradiotherapy ( CRT) were reviewed and stained immunohistochemically for cytokeratin and chromogranin."

"The presence of ECM and/ or SEC within the mucosa adjacent to the tumour was noted, and the results correlated with the extent of tumour regression. The corresponding pretreatment endoscopic biopsy specimens were reviewed in 6 cases, and the results were also compared to 10 tumour resections from patients with no history of neo- adjuvant treatment. ECM and/ or SEC were identified in 8/ 11 resection specimens after chemotherapy or CRT. The endocrine cells were typically located within the deep lamina propria or muscularis mucosae and were associated with varying degrees of glandular atrophy and inflammation. The appearances were most consistent with endocrine cell preservation ( pseudo- hyperplasia) following treatment. Isolated endocrine elements were not seen in the pretreatment biopsy specimens, while rare SEC without ECM were identified in only 2/ 10 control resection specimens. Endocrine cell pseudo- hyperplasia may be seen within atrophic glandular mucosa following neo- adjuvant therapy of distal oesophageal/ OGJ adenocarcinomas," wrote C.J.R. Stewart and colleagues.

The researchers concluded: "The changes are analogous to those seen in chronic atrophic gastritis and should not be misinterpreted as those of residual tumour."

Stewart and colleagues published their study in the Journal of Clinical Pathology (Mucosal endocrine cell micronests and single endocrine cells following neo-adjuvant therapy for adenocarcinoma of the distal oesophagus and oesophagogastric junction. Journal of Clinical Pathology, 2007;60(11):1284-1289).

For more information, contact C.J.R. Stewart, Sir Charles Gairdner Hospital, Division Anatomy Pathology, Perth, WA 6009, Australia.

Publisher contact information for the Journal of Clinical Pathology is: B M J Publishing Group, British Med Association House, Tavistock Square, London WC1H 9JR, England.

Keywords: Australia, Perth, Adenocarcinoma, Biopsy, Chemotherapy, Clinical Pathology, Drug Therapy, Endocrine, Surgery, Treatment.

This article was prepared by Medical Devices & Surgical Technology Week editors from staff and other reports. Copyright 2008, Medical Devices & Surgical Technology Week via NewsRx.com.