Gastric precancerous lesions among Nigerians with chronic gastritis.
OBJECTIVE
To investigate the frequency of precancerous lesions in H. pylori gastritis in Nigerians


METHODS
Previously, the slides of all endoscopic gastroduodenal biopsies seen at the Pathology Department of Obafemi Awolowo University Teaching Hospital, Ile-Ife between 1994 and 2003 were reviewed and published. The current review examined interplay of intestinal metaplasia, glandular atrophy and epithelial dysplasia with H.pylori. The H.pylori, intestinal metaplasia and glandular atrophy were graded based on updated Sydney classification scheme while Vienna classification was used for dysplasia.


RESULTS
Out of 1036 biopsies seen during the study period, 135 (13%) had associated precancerous lesions. Intestinal metaplasia was the commonest (9.2%), followed by severe atrophic gastritis (4.3%) and low grade dysplasia (0.7%) occurring either alone or in various combinations. Most of these lesions were seen in patients above 40 years of age and over 80% were H.pylori positive.


CONCLUSIONS
Frequency of precancerous lesions is low among Nigerians with H.pylori gastritis. Intestinal metaplasia was the commonest lesion and was mostly type I with relatively low risk for gastric cancer development. The relatively high prevalence H.pylori infection among these cases could have resulted from repeated infection and most were localised to the corpus relative to the antral region where the precancerous lesions were seen.
Department of Morbid Anatomy and Forensic Medicine, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Osun State. Nigeria. badmoskb@yahoo.com
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D000230:Adenocarcinoma / Q000453:epidemiology* / Q000473:pathology; D000328:Adult; D000368:Aged; D001706:Biopsy; D005260:Female; D005753:Gastric Mucosa / Q000473:pathology; D005756:Gastritis / Q000453:epidemiology* / Q000473:pathology; D005757:Gastritis, Atrophic / Q000453:epidemiology / Q000473:pathology; D005773:Gastroscopy; D016481:Helicobacter Infections / Q000453:epidemiology; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008679:Metaplasia / Q000453:epidemiology / Q000473:pathology; D008875:Middle Aged; D011230:Precancerous Conditions / Q000453:epidemiology* / Q000473:pathology; D015995:Prevalence; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index; D013274:Stomach Neoplasms / Q000453:epidemiology* / Q000473:pathology