Delayed diagnosis of colorectal sexually transmitted diseases due to their resemblance to inflammatory bowel diseases.
Open accessAbstract
OBJECTIVE: Sexually transmitted diseases (STDs), mainly lymphogranuloma venereum (LGV), induce colorectal symptoms that may be misdiagnosed as inflammatory bowel disease (IBD). This study describes patients who presented with STDs masquerading as IBD in order to improve understanding of missed diagnosis of colorectal STDs and their association with LGV in Israel. METHODS: This retrospective, descriptive study characterized the clinical, endoscopic, and pathological findings of 16 patients who were diagnosed with a colorectal STD after erroneously being diagnosed with IBD. Molecular genotyping was used to characterize some of the Chlamydia trachomatis isolates. RESULTS: All patients were men who have sex with men (MSM), mostly HIV-1-positive, and had clinical and endoscopic findings compatible with IBD. The STD was diagnosed 1-36 months after the initial diagnosis: 14 were positive for Chlamydia trachomatis, of which three were of the LGV2b (ST58) serotype and one was ST 108 serotype. Five were positive for gonorrhea and four were positive for syphilis. Several pathogens were diagnosed in six episodes. CONCLUSIONS: Colorectal STDs may resemble IBD and therefore their diagnosis may be delayed. IBD symptoms in MSM who engage in non-protected anal sex should prompt at least syphilis and anal PCR for STD testing. If C. trachomatis is diagnosed but LGV subtyping cannot be done, doxycycline 100mg twice daily for 21days should be recommended.
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The clinical presentation of proctocolitis can be mistaken for inflammatory bowel disease or malignancy, resulting in a delayed diagnosis.
“The clinical presentation can be mistaken for inflammatory bowel disease or malignancy, resulting in a delayed diagnosis (1384,1385).”
From Sexually Transmitted Infections Treatment Guidelines, 2021 (2021) · cites this paper as [1384]
Cites
Nieuwenhuis, R. F., Ossewaarde, J. M., Götz, H. M., Dees, J., Thio, H. B., Thomeer, M. G. J., den Hollander, J. C., NEUMANN, M. H. A. M., & van der Meijden, W. I. (2004) · Clinical Infectious Diseases · doi:10.1086/423966 · Cited by 338 · see citing works
Chlamydia trachomatisProctitis
Quinn, T. C., Goodell, S. E., Mkrtichian, E., Schuffler, M. D., Wang, S. P., Stamm, W. E., & Holmes, K. K. (1981) · New England Journal of Medicine · doi:10.1056/nejm198107233050404 · Cited by 251 · see citing works
Bachmann, L. H., Johnson, R. E., Cheng, H. M., Markowitz, L. E., Papp, J. R., Palella, F. J., & Hook, E. W. (2010) · Journal of Clinical Microbiology · doi:10.1128/jcm.02398-09 · Cited by 170 · see citing works
Pannekoek, Y., Morelli, G., Kušećek, B., Morré, S. A., Ossewaarde, J. M., Langerak, A. A. J., & ENDE, A. V. D. (2008) · BMC Microbiology · doi:10.1186/1471-2180-8-42 · Cited by 157 · see citing works
SARS Coronavirus Detection Methods
Lau, S. K. P., Che, X.-Y., Woo, P. C. Y., Wong, B. H. L., Cheng, V. C., Woo, G. K. S., Hung, I. F., Poon, R. W., Chan, K., Peiris, M. J. S., et al. (2005) · Emerging infectious diseases · doi:10.3201/eid1107.040883 · Cited by 140 · see citing works
van der Helm, J. J., Hoebe, C. J. P. A., van Rooijen, M. S., Brouwers, E. E. H. G., Fennema, H. S. A., Thiesbrummel, H. F. J., & Dukers-Muijrers, N. H. T. M. (2009) · Sexually Transmitted Diseases · doi:10.1097/olq.0b013e3181a44b8c · Cited by 138 · see citing works
High-Resolution Genotyping of Chlamydia trachomatis Strains by Multilocus Sequence Analysis
Klint, M., Fuxelius, H., Goldkuhl, R., Skarin, H., Rutemark, C., Andersson, S. G. E., Persson, K., & HERRMANN, B. F. (2007) · Journal of Clinical Microbiology · doi:10.1128/jcm.02301-06 · Cited by 135 · see citing works
Syphilitic and Lymphogranuloma Venereum (LGV) Proctocolitis
Arnold, C. A., Limketkai, B. N., Illei, P. B., Montgomery, E. A., & Voltaggio, L. (2012) · The American Journal of Surgical Pathology · doi:10.1097/pas.0b013e31826a523e · Cited by 117 · see citing works
Lymphogranuloma venereum proctitis masquerading as inflammatory bowel disease in 12 homosexual men
Soni, S., Srirajaskanthan, R., Lucas, S. B., Alexander, S., Wong, T., & White, J. A. (2010) · Alimentary Pharmacology & Therapeutics · doi:10.1111/j.1365-2036.2010.04313.x · Cited by 110 · see citing works
Predicting Phenotype and Emerging Strains among Chlamydia trachomatis Infections
Dean, D., Bruno, W., Wan, R., Gomes, J. P., Devignot, S., Mehari, T., de Vries, H. J. C., Morré, S. A., Myers, G. S. A., Read, T. D., et al. (2009) · Emerging infectious diseases · doi:10.3201/eid1509.090272 · Cited by 98 · see citing works
Martín-Iguacel, R., Llibre, J. M., Nielsen, H. I., Heras, E., Matas, L., Lugo, R., Clotet, B., & Sirera, G. (2010) · European Journal of Clinical Microbiology & Infectious Diseases · doi:10.1007/s10096-010-0959-2 · Cited by 92 · see citing works
Lymphogranuloma venereum proctosigmoiditis is a mimicker of inflammatory bowel disease.
Gallegos, M., Bradly, D. P., Jakate, S. M., & Keshavarzian, A. (2012) · Europe PMC (PubMed Central) · doi:10.3748/wjg.v18.i25.3317 · Cited by 86 · see citing works
Nieuwenhuis, R. F. (2003) · Sexually Transmitted Infections · doi:10.1136/sti.79.6.453 · Cited by 85 · see citing works
Bom, R. J. M., Christerson, L., van der Loeff, M. F. S., Coutinho, R. A., HERRMANN, B. F., & Bruisten, S. M. (2011) · Journal of Clinical Microbiology · doi:10.1128/jcm.00128-11 · Cited by 80 · see citing works
Follicular proctocolitis and neuromatous hyperplasia with lymphogranuloma venereum
de la Monte, S. M., & Hutchins, G. M. (1985) · Human Pathology · doi:10.1016/s0046-8177(85)80280-x · Cited by 76 · see citing works
Arnold, C. A., Roth, R. M., Arsenescu, R. I., Harzman, A. E., Lam-Himlin, D. M., Limketkai, B. N., Montgomery, E. A., & Voltaggio, L. (2015) · American Journal of Clinical Pathology · doi:10.1309/ajcpoid4jij6pisc · Cited by 75 · see citing works
Lymphogranuloma venereum proctitis: A differential diagnose to inflammatory bowel disease
Høie, S., Knudsen, L. S., & Gerstoft, J. (2010) · Scandinavian Journal of Gastroenterology · doi:10.3109/00365521.2010.537681 · Cited by 69 · see citing works
The etiology of infectious proctitis in men who have sex with men differs according to HIV status.
Bissessor, M., Fairley, C. K., Read, T., Denham, I., Bradshaw, C., & Chen, M. (2013) · Sexually Transmitted Diseases · doi:10.1097/olq.0000000000000022 · Cited by 65 · see citing works
Lymphogranuloma venereum in the industrialised world
Blank, S., Schillinger, J. A., & Harbatkin, D. (2005) · The Lancet · doi:10.1016/s0140-6736(05)66490-2 · Cited by 60 · see citing works
Global Multilocus Sequence Type Analysis of Chlamydia trachomatis Strains from 16 Countries
HERRMANN, B. F., Isaksson, J., Ryberg, M. K., Tångrot, J., Saleh, I., Versteeg, B., Gravningen, K. M., & Bruisten, S. M. (2015) · Journal of Clinical Microbiology · doi:10.1128/jcm.00249-15 · Cited by 55 · see citing works
Spectrum of rectal biopsy abnormalities in homosexual men with intestinal symptoms
Surawicz, C. M., Goodell, S. E., Quinn, T. C., Roberts, P. L., Corey, L., Holmes, K. K., Schuffler, M. D., & Stamm, W. E. (1986) · Gastroenterology · doi:10.1016/0016-5085(86)90635-9 · Cited by 52 · see citing works
Lymphogranuloma Venereum in North America: Case Reports and an Update for Gastroenterologists
Tinmouth, J., Rachlis, A., Wesson, T., & Hsieh, E. (2006) · Clinical Gastroenterology and Hepatology · doi:10.1016/j.cgh.2005.12.006 · Cited by 34 · see citing works
Cabello, A., Roblas, R. F., Delgado, R., Martínez-García, L., Sterlin, F., Guerrero, M. L. F., & Górgolas, M. (2016) · Sexually Transmitted Diseases · doi:10.1097/olq.0000000000000459 · Cited by 28 · see citing works
Parra-Sánchez, M., García-Rey, S., Rodríguez, I. P., Fernández, P. V., Sánchez, M. J. T., & Folia, J. C. P. (2016) · Sexually Transmitted Infections · doi:10.1136/sextrans-2015-052453 · Cited by 26 · see citing works
Isaksson, J., Carlsson, O., Airell, Å., Strömdahl, S. K., Bratt, G., & HERRMANN, B. F. (2017) · Journal of Medical Microbiology · doi:10.1099/jmm.0.000597 · Cited by 22 · see citing works
Chlamydia trachomatisL serovars and dominance of novel L2bompAvariants, USA
Kendall, B. A., Tardif, K. D., & Schlaberg, R. (2014) · Sexually Transmitted Infections · doi:10.1136/sextrans-2013-051478 · Cited by 10 · see citing works
Latini, A., Zaccarelli, M., Paglia, M. G., Donà, M. G., Giglio, A., Moretto, D., Vulcano, A., Giuliani, M., Colafigli, M., Ambrifi, M., et al. (2017) · BMC Infectious Diseases · doi:10.1186/s12879-017-2484-8 · Cited by 9 · see citing works
Enhanced surveillance of a lymphogranuloma venereum outbreak in Sydney 2010–2012
Templeton, D. J., Ressler, K., Hope, K. G., & Poynten, I. M. (2016) · Australian and New Zealand Journal of Public Health · doi:10.1111/1753-6405.12532 · Cited by 8 · see citing works
Flagged first, then by citations
2 of the 30 references couldn’t be matched to a known paper.
Cited by
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Sexually Transmitted Infections Treatment Guidelines, 2021
Workowski, K. A., Bachmann, L. H., Chan, P. A., Johnston, C. M., Muzny, C. A., Park, I., Reno, H., Zenilman, J. M., & Bolan, G. A. (2021) · MMWR. Recommendations and Reports · doi:10.15585/mmwr.rr7004a1 · Cited by 2,759 · see citing works
Digestive Health in Sexual and Gender Minority Populations
Vélez, C. D., Casimiro, I., Pitts, R. A., Streed, C. G., & Paul, S. (2022) · The American Journal of Gastroenterology · doi:10.14309/ajg.0000000000001804 · Cited by 57 · see citing works
“Of note, lymphogranuloma venereum, a serovar of chlamydia typically more symptomatic, is most commonly diagnosed among MSM (29), and treatment requires a longer course of doxycycline.”
BackgroundInfluentialDombrowski, J. C. (2021) · Annals of Internal Medicine · doi:10.7326/aitc202110190 · Cited by 27 · see citing works
Lower Gastrointestinal Syphilis: Case Series and Literature Review
Ferzacca, E., Barbieri, A., Barakat, L., Olave, M. C., & Dunne, D. (2021) · Open Forum Infectious Diseases · doi:10.1093/ofid/ofab157 · Cited by 19 · see citing works
“Case series document misdiagnosis of LGIS as inflammatory bowel disease [4] with associated delay in treatment and increased risk for ongoing transmission and development of complications such as rectal fissure, fistula, and stricture.”
BackgroundWieder, A., Zilberman, T., Erster, O., Wagner-Kolasko, G., Biber, A., Gofen, R., Hoffman, T., Litchevsky, V., Olmer, L., Yahav, D., et al. (2022) · International Journal of Infectious Diseases · doi:10.1016/j.ijid.2022.12.014 · Cited by 19 · see citing works
“Our findings are in accordance with more traditional STIs, hich are more likely to be correctly diagnosed when presenting n the classical genital areas, and more likely to be misdiagnosed hen presenting in extragenital sites [9] .”
ResultTsai, C.-S., Chen, P., Lee, N., Tsai, H., Huang, S., Chen, S., Tang, Y.-W., Lin, Y.-C., Tsai, P.-F., Mao, L.-W., et al. (2023) · Journal of Microbiology Immunology and Infection · doi:10.1016/j.jmii.2023.01.007 · Cited by 15 · see citing works
Siwak, E., Suchacz, M. M., Cielniak, I., Kubicka, J., Firląg‐Burkacka, E., & Wiercińska‐Drapało, A. (2022) · Journal of Clinical Medicine · doi:10.3390/jcm11185324 · Cited by 11 · see citing works
“showed that, in HIV-infected MSM, some STIs such as Chlamydia trachomatis, lymphogranuloma venereum (LGV), gonorrhea, syphilis and HSV may have similar symptoms and endoscopic findings as IBD [25].”
BackgroundElmahdi, R., Kochhar, G. S., Iversen, A. T., Allin, K. H., Dulai, P. S., Desai, A., & Jess, T. (2022) · Gastro Hep Advances · doi:10.1016/j.gastha.2022.08.003 · Cited by 11 · see citing works
Immunohistochemical detection of chlamydia trachomatis in sexually transmitted infectious proctitis
Arévalo, F., Rayme, S., Zurita, F., Ramírez, R., Franco, D., Montes, P., Fustamante, J., & Monge, E. (2022) · BMC Gastroenterology · doi:10.1186/s12876-022-02233-w · Cited by 10 · see citing works
“Levy [20] found microabscess in 58% of cases of lymphogranuloma venereum.”
BackgroundMethodInfluentialPilo, S., Valenci, G. Z., Rubinstein, M., Pichadze, L., Scharf, Y., Dveyrin, Z., Rorman, E. G., & Nissan, I. (2021) · BMC Microbiology · doi:10.1186/s12866-020-02077-y · Cited by 10 · see citing works
“by ulcerative proctitis [16], the LGV disease is of high concern [12–15, 17–19].”
BackgroundBosma, J. W., van Tienhoven, A. J., Thiesbrummel, H. F. J., de Vries, H. J. C., & Veenstra, J. (2021) · International Journal of STD & AIDS · doi:10.1177/0956462420980641 · Cited by 8 · see citing works
“This difference might be explained by previous studies showing that patients with LGV presenting with an anorectal syndrome are often misdiagnosed as a non-specific infectious colitis or as a first manifestation of IBD.5,6 Second, the number of medical specialists involved seems to result in a longer TTD.”
BackgroundResultPimentel, R., Correia, C., Estorninho, J., Gravito‐Soares, E., Gravito‐Soares, M., & Figueiredo, P. (2021) · GE Portuguese Journal of Gastroenterology · doi:10.1159/000516011 · Cited by 8 · see citing works
Hong, D., Cherabie, J. N., & Reno, H. (2023) · Medical Clinics of North America · doi:10.1016/j.mcna.2023.09.004 · Cited by 6 · see citing works
Waters, K. M., Cox, B. K., Wong, M., Guindi, M. M., Kim, S. A., Larson, B. K., Morgan, M. A., Voltaggio, L., & Balzer, B. L. (2020) · Histopathology · doi:10.1111/his.14232 · Cited by 6 · see citing works
Lymphogranuloma venereum mimicking rectal cancer (T3 N2) and causing a rectovesical fistula
Sadoghi, B., Komericki, P., Igrec, J., Hutterer, G. C., & Wolf, P. (2021) · International Journal of STD & AIDS · doi:10.1177/0956462420948353 · Cited by 4 · see citing works
“Recently, a group from Israel focused on delayed diagnosis of colorectal STIs, including NG, CT and syphilis, as symptoms were misinterpreted as IBD.(6) The authors urged that at least testing of syphilis and anal Chlamydia should be offered in MSM who have symptoms of procto(colitis).”
BackgroundInfluentialSeparating Infectious Proctitis from Inflammatory Bowel Disease—A Common Clinical Conundrum
Hall, R., Patel, K., Poullis, A. P., Pollok, R., & Honap, S. (2024) · Microorganisms · doi:10.3390/microorganisms12122395 · Cited by 4 · see citing works
“There are reports of patients undergoing surgery for presumed perianal CD [60] or receiving infliximab treatment [8] prior to the correct diagnosis.”
InfluentialKlassische sexuell übertragbare Infektionen im Analbereich
Spornraft‐Ragaller, P., & Esser, S. (2020) · Der Hautarzt · doi:10.1007/s00105-020-04547-w · Cited by 4 · see citing works
Reed, S., Bugwadia, A. K., Dave, S., Wilson, H. E., Ramesh, P., & Michel, H. K. (2023) · Health Care Transitions · doi:10.1016/j.hctj.2023.100033 · Cited by 3 · see citing works
Infectious Proctitis due to Chlamydia trachomatis: Venereal Diseases in Proctology
Silva, J. C., Rodrigues, A., & Carvalho, J. (2020) · GE Portuguese Journal of Gastroenterology · doi:10.1159/000507205 · Cited by 3 · see citing works
Newman, K. L., Jencks, K. J., Chedid, V. G., Paul, S., Higgins, P. D. R., Kane, S. V., & Long, M. D. (2022) · Gut · doi:10.1136/gutjnl-2022-328802 · Cited by 3 · see citing works
Martínez-García, L., González‐Alba, J. M., Puerta, T., Comunión, A., Rodríguez-Jiménez, M. C., Orviz, E., Sánchez‐Conde, M., Rodríguez-Domínguez, M., Cantón, R., & Galán, J. C. (2022) · Frontiers in Microbiology · doi:10.3389/fmicb.2022.1056216 · Cited by 2 · see citing works
Case series of perianal and pelvic MRI imaging findings in monkeypox
Gan, J., Patel, J., Ainsworth, E., Patel, A. M., O’Hara, G. A., & Elowaidy, A. (2022) · BJR|case reports · doi:10.1259/bjrcr.20220109 · Cited by 2 · see citing works
Oliver, L., Pak, K., Maier, A., & Sadowski, B. W. (2024) · Military Medicine · doi:10.1093/milmed/usae027 · Cited by 1 · see citing works
Clinical, endoscopic and histological characteristics of Chlamydia trachomatis proctitis in males
Téller, M., Giordano, A., González‐Muñoza, C., Gordillo, J., Bertoletti, F., Sánchez, F., & García-Planella, E. (2025) · Gastroenterología y Hepatología · doi:10.1016/j.gastrohep.2025.502558 · Cited by 1 · see citing works
Clinical features of venereal lymphogranuloma course
Titov, I. S., Guschin, A. E., Frigo, N. V., Dolya, O. V., & Жукова, О. В. (2024) · Russian Journal of Clinical Dermatology and Venereology · doi:10.17116/klinderma202423031313 · Cited by 1 · see citing works
Sexually Transmitted Infections of the Colon and Rectum
Cowan, M. L., & Schlussel, A. T. (2021) · Springer eBooks · doi:10.1007/978-3-030-66049-9_18 · Cited by 1 · see citing works
Rasokat, H. (2019) · Der Deutsche Dermatologe · doi:10.1007/s15011-019-2392-x
Lymphogranuloma venereum: intersection between venereology and gastroenterology
Tamási, B., Tóth, B., Balla, E., & Sárdy, M. (2019) · Bőrgyógyászati és Venerológiai Szemle · doi:10.7188/bvsz.2019.95.3.1
Syphilitic pancolitis: A case report with literature review
Chang, H. L., Tang, T., & Kuo, C.-F. (2022) · International Journal of STD & AIDS · doi:10.1177/09564624221076957
“A retrospective study by Levy et al.9 found that the diagnosis of sexually transmitted colitis could be delayed as long as 36 months.”
BackgroundPersistierende Proktitis und anorektales Ulkus
Tripolt‐Droschl, K., Schwarz, S., Schmölzer, H., Schiefer‐Niederkorn, A., & Sadoghi, B. (2023) · Die Chirurgie · doi:10.1007/s00104-023-01961-3
Arévalo, F., Rayme, S., Zurita, F., Ramírez, R., Franco, D., Montes, P., Fustamante, J., & Monge, E. (2022) · Figshare · doi:10.6084/m9.figshare.19556286
Clinical, endoscopic and histological characteristics of Chlamydia trachomatis proctitis in males
Téller, M., Giordano, A., González‐Muñoza, C., Gordillo, J., Bertoletti, F., Sánchez, F., & García-Planella, E. (2026) · Gastroenterología y Hepatología (English Edition) · doi:10.1016/j.gastre.2025.502558
Srivastava, H., Sehgal, T., Sharma, V., Narang, H., Berinstein, J. A., Sood, A., Bishu, S., & Goyal, M. K. (2026) · Expert Review of Clinical Immunology · doi:10.1080/1744666x.2026.2642832
Ciccarese, G., Drago, F., Cazzato, G., Torres, M. C. P., Varesano, S., MARCO, A. D., Serviddio, G., Foti, C., & Mastracci, L. (2026) · European Journal of Clinical Microbiology & Infectious Diseases · doi:10.1007/s10096-026-05490-9
“In our patient, the long duration and the severity of the symptoms led us to assume a diagnosis of LV. Importantly, the clinical, endoscopic and pathologic find - ings of CT proctitis can closely resemble those found in IBD [11, 12], which can cause misdiagnoses.”
Anorectal syphilis in men who have sex with men (MSM): a systematic review
Caid, T. B., Middleton, Z., Rabuszko, L., Llewellyn, C. D., & Richardson, D. (2026) · Frontline Gastroenterology · doi:10.1136/flgastro-2026-103799
Lymphogranuloma venereum (LGV) proctocolitis in men who have sex with men: a systematic review
Middleton, Z., Caid, T. B., Rabuszko, L., Llewellyn, C. D., & Richardson, D. (2026) · Frontline Gastroenterology · doi:10.1136/flgastro-2026-103794
Abdulrasak, M., & Bagger-Jörgensen, H. (2026) · JMIR Public Health and Surveillance · doi:10.2196/102167
- Authors
- Levy, I., Gefen-Halevi, S., Nissan, I., Keller, N., Pilo, S., Wieder-Finesod, A., Litchevski, V., Shasha, D., Kedem, E., & Rahav, G.
- Affiliations
- Tel Aviv University (IL)
- Sheba Medical Center (IL)
- Israel Ministry of Health (IL)
- Tel Aviv Sourasky Medical Center (IL)
- Rambam Health Care Campus (IL)
- Corresponding author
- Levy, Itzchak
- Venue
- International Journal of Infectious Diseases
- Publisher
- Elsevier BV
- Published
- 2018-10
- Volume
- 75
- Pages
- 34-38
- ISSN
- 1201-9712 (ISSN-L)
- OpenAlex
- W2887117028
- Cited by
- 37
- References
- 30
- Citations by year
- 2026: 6 · 2025: 1 · 2024: 3 · 2023: 4 · 2022: 10 · 2021: 8 · 2020: 3 · 2019: 2
- FWCI
- 2.63
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- International Journal of Infectious Diseases (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Life Sciences › Immunology and Microbiology › Microbiology › Reproductive tract infections research
- Health Sciences › Medicine › Physiology › Syphilis Diagnosis and Treatment
- Health Sciences › Medicine › Epidemiology › Microscopic Colitis
- Keywords
- sexually transmitted infections, lymphogranuloma venereum, Chlamydia trachomatis, inflammatory bowel disease mimic, delayed diagnosis, men who have sex with men, HIV-1, gonorrhea, syphilis, doxycycline treatment, anal sex
- MeSH terms
- Adult, Aged, Humans, Male, Middle Aged, Proctitis, Proctocolitis, Retrospective Studies, Sexually Transmitted Diseases, Inflammatory Bowel Diseases, Homosexuality, Male, Young Adult, Delayed Diagnosis
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