Abstract
Objective: This study aimed to evaluate the pattern of presentation of infectious lesions mimicking malignancy. This will serve to heighten clinical indices of suspicion and prevent unwarranted aggressive management.
 Methods: This is a 19-year (1999-2017) audit review of all morphologically diagnosed infection-related lesions in which malignancy was primarily clinically suspected.
 Results: Fifty-six cases of infection-related mimics of malignancy were diagnosed in the study period: schistosomiasis related, 22 (39.2%); actinomycosis, 21(37.5%); tuberculosis-related, 10 (17.9%); fungi-related, 3(5.4%). Twenty-one cases of actinomycosis of the lower limbs and oropharynx were mistaken for melanoma, squamous cell carcinoma, sarcoma, and oropharyngeal carcinoma. The mean age was 33±17years.The 10 patients with atypical Mycobacterium tuberculosis-mimicking malignancy had mean age of 37±14 years and included three in the testes, testicular cases, one from the jaw, and two cases each from ovary, breast, and uterus. Of the three fungal lesions, there was a case each from the brain, skin, and bone. All were males with mean age of 21±7 years.
 Conclusion: For accurate diagnosis of infection-related mimics of malignancy, a high index of clinical suspicion, knowledge of and attention to characteristic radiological signs, and obtaining representative tissues for histopathologic and cytopathologic diagnoses are paramount.
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