Intestinal histoplasmosis in immunocompetent adults

• Published in: World journal of gastroenterology : WJG Vol. 22; no. 15; pp. 4027 - 4033
• Main Authors: Zhu, Lin-Lin, Wang, Jin, Wang, Zi-Jing, Wang, Yi-Ping, Yang, Jin-Lin
• Format: Journal Article
• Language: English
• Published: United States Baishideng Publishing Group Inc 21.04.2016
• Subjects: Adult; Antifungal Agents - therapeutic use; Bacteriological Techniques; Biopsy; characteristics;Di; China; Colonoscopy; Diagnosis, Differential; Histoplasma - isolation & purification; Histoplasmosis - diagnosis; Histoplasmosis - drug therapy; Histoplasmosis - immunology; Histoplasmosis - microbiology; histoplasmosis;Disseminated; histoplasmosis;Immunocompetence;Endoscopic; Humans; Immunocompetence; Intestinal; Intestinal Diseases - diagnosis; Intestinal Diseases - drug therapy; Intestinal Diseases - immunology; Intestinal Diseases - microbiology; Intestines - diagnostic imaging; Intestines - drug effects; Intestines - microbiology; Intestines - pathology; Male; Middle Aged; Predictive Value of Tests; Retrospective Studies; Retrospective Study; Treatment Outcome; Intestinal histoplasmosis; Endoscopic characteristics; Differential diagnosis; Immunocompetence; Disseminated histoplasmosis
• ISSN: 1007-9327; 2219-2840; 2219-2840
• DOI: 10.3748/wjg.v22.i15.4027

AIM: To present a retrospective analysis of clinical and endoscopic features of 4 cases of immunocompetent hosts with intestinal histoplasmosis(IH).METHODS: Four immunocompetent adults were diagnosed with IH between October 2005 and March 2015 at West China Hospital of Sichuan University. Clinical and endoscopic characteristics were summarized and analyzed retrospectively. GMS(Gomori methenamine silver), PAS(periodic acid-Schiff) and Giemsa staining technique were used to confirm Histoplasma capsulatum(H. capsulatum). The symptoms, signs, endoscopic presentations, radiographic imaging, pathological stain results and follow-up are presented as tables and illustrations.RESULTS: The cases were male patients, ranging from 33 to 61 years old, and primarily presented with nonspecific symptoms such as irregular fever, weight loss, abdominal pain and distention. Hepatosplenomegaly and lymphadenopathy were the most common signs. Endoscopic manifestations were localized or diffuse congestion, edema, ulcers, and polypoid nodules with central erosion involving the terminal ileum, ascendingcolon, transverse colon, descending colon, sigmoid colon and rectum, similar to intestinal tuberculosis, tumor, and inflammatory bowel disease. Numerous yeast-like pathogens testing positive for PAS and GMS stains but negative for Giemsa were detected in the cytoplasm of the histiocytes, which were highly suggestive of H. capsulatum.CONCLUSION: Immunocompetent individuals suffering from histoplasmosis are rarely reported. It is necessary that gastroenterologists and endoscopists consider histoplasmosis as a differential diagnosis, even in immunocompetent patients.