Surgical management of appendicitis in patients with human immunodeficiency virus (HIV) positivity: a propensity score-matched analysis in a base hospital for HIV treatment in Japan

PURPOSE: To investigate the impact of human immunodeficiency virus (HIV) infection on surgical outcomes after appendectomy. METHODS: Data on patients who underwent appendectomy for acute appendicitis between 2010 and 2020 at our hospital were investigated retrospectively. The patients were classified into HIV-positive and HIV-negative groups using propensity score-matching (PSM) analysis, adjusting for the five reported risk factors for postoperative complications: age, sex, Blumberg’s sign, C-reactive protein level, and white blood cell count. We compared the postoperative outcomes of the two groups. HIV infection parameters, including the number and proportion of CD4 + lymphocytes and the HIV-RNA levels were also compared before and after appendectomy in the HIV-positive patients. RESULTS: Among 636 patients enrolled, 42 were HIV-positive and 594 were HIV-negative. Postoperative complications occurred in five HIV-positive patients and eight HIV-negative patients, with no significant difference in the incidence (p = 0.405) or severity of any complication (p = 0.655) between the groups. HIV infection was well-controlled preoperatively using antiretroviral therapy (83.3%). There was no deterioration in parameters and no changes in the postoperative treatment in any of the HIV-positive patients. CONCLUSION: Advances in antiviral drugs have made appendectomy a safe and feasible procedure for HIV-positive patients, with similar postoperative complication risks to HIV-negative patients.