- Correlation between Helicobacter pylori Infection and Lymphoid Follicle Formation in Gastrectomy Specimens.
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Won Ae Lee, Hye Sung Hahn, Woo Ho Kim, Yong Il Kim
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Korean J Pathol. 1998;32(3):162-168.
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 Abstract
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- Histopathologic studies for Helicobacter pylori (H.
pylori)-associated chronic gastritis have been mostly undertaken with endoscopic biopsy specimens, often leading to an inappropriate evaluation of the gastric mucosal alterations. The purpose of this paper was designed to investigate the actual prevalence of lymphoid follicle formation by H. pylori infection using the resected stomachs. A total of 16 fresh gastrectomy specimens bearing gastric carcinoma were examined under the quick and gentle procedure, with which H. pylori was detected in 12 cases (75%) and lymphoid follicles in 14 cases (87.5%), while the detection rate of H. pylori remained 56.3% in the control group which comprised the same 16 resected stomachs and were examined by routine tissue preparation procedure without any special care. There was a significant correlation between the presence of H. pylori and lymphoid follicle formation (p=0.05), but no correlation was found between the grades of H. pylori and lymphoid follicles. The topographical distribution of H. pylori or lymphoid follicles in antrum and body gave no statistical difference. Similarly, there was no correlation between H. pylori infection and intestinal metaplasia, activity of chronic gastritis or histologic types of accompanying adenocarcinoma. We conclude that studies of the gastric mucosal change by H. pylori infection using the gastrectomy specimens provide a useful information for analysis of lymphoid follicle formation which is a consistent morphological characteristic of H.
pylori infection.
- Cytomegalovirus Infection in Idiopathic Inflammatory Bowel Disease: Clinicopathologic Analysis of 6 Cases.
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Won Ae Lee, Hye Sung Hahn, Woo Ho Kim, Yong Il Kim
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Korean J Pathol. 1998;32(2):125-130.
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Abstract
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- Cytomegalovirus (CMV) infection is an uncommon association with idiopathic inflammatory bowel disease (IBD) often leading to a variety of serious complications. A total of 41 resected cases of IBD were examined to elucidate the pathologic features of intestinal CMV infection which was assessed by histologic examination and confirmed by immunohistochemistry with CMV antibody. Six cases were positve for CMV antibody; five cases in 19 ulcerative colitis (UC, 26.3%) and one case in 22 Crohn's disease (CD, 4.5%). Of 7 cases of the steroid-treated UC group, five cases were superinfected with CMV (71.4%) but none in 12 cases of the steroid-untreated UC group. All of the five CMV-positive cases in UC showed deep ulceration and transmural inflammation, while none of 10 UC cases without above features were CMV positive. Fibrinoid necrosis and thrombi were found in 83.3% of the CMV infected group, while none in the CMV-negative group of UC cases (p=0.01). We conclude that IBD, particularly UC, is susceptible to the CMV infection when steroid hormone is administered, and that deep colonic ulceration, transmural inflammation and fibrinoid necrosis of vasculature may suggest superinfection of CMV in UC patients. It seems that deep colonic ulceration may be the consequence of an ischemic change following vascular luminal occlusion or vasculitis by CMV infection.
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