Endoscopic and histopathological study on the duodenum of Strongyloides stercoralis hyperinfection

Kishimoto, Kazuto; Hokama, Akira; Hirata, Tetsuo; Ihama, Yasushi; Nakamoto, Manabu; Kinjo, Nagisa; Kinjo, Fukunori; Fujita, Jiro; Scheiman, James M.
March 2008
World Journal of Gastroenterology;3/21/2008, Vol. 14 Issue 11, p1768
Academic Journal
AIM: To investigate endoscopic and histopathological findings in the duodenum of patients with Strongyloides stercoralis ( S. stercoralis) hyperinfection. METHODS: Over a period of 23 years (1984-2006), we investigated 25 patients with S. stercoralis hyperinfection who had had an esophagogastroduodenoscopy before undergoing treatment for strongyloidiasis. The clinical and endoscopic findings were analyzed retrospectively. RESULTS: Twenty- four (96%) of the patients investigated were under immunocompromised condition which was mainly due to a human T lymphotropic virus type 1 (HTLV-1) infection. The abnormal endoscopic findings, mainly edematous mucosa, white villi and erythematous mucosa, were observed in 23 (92%) patients. The degree of duodenitis including villous atrophy/destruction and inflammatory cell infiltration corresponded to the severity of the endoscopic findings. The histopathologic yield for identifying larvae was 71.4% by duodenal biopsy. The endoscopic findings of duodenitis were more severe in patients whose biopsies were positive for larvae than those whose biopsies were negative (Endoscopic severity score: 4.86 ± 2.47 vs 2.71 ± 1.38, P < 0.05). CONCLUSION: Our study clearly demonstrates that, in addition to stool analysis, endoscopic observation and biopsies are very important. We also emphasize that S. stercoralis and HTLV-1 infections should be ruled out before immunosuppressive therapy is administered in endemic regions.


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