PubMed · 16124354
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T V Rao, C S V Subramanyam. 2005. Cryptococcal abscess--unusual presentation.. https://pubmed.ncbi.nlm.nih.gov/16124354/
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OBJECTIVES: To determine the utility of percutaneous computed tomography (CT) guided drainage of abscesses formed secondary to retained appendicoliths. MATERIALS AND METHODS: A retrospective review was conducted over a 5-year period to identify patients who underwent CT guided drainage of abscesses related to retained appendicoliths. Inclusion criteria were a history of prior proven appendicitis treated by laparoscopic appendicectomy, identification of a post-operative abscess related to a visualised retained appendicolith and initial treatment by CT guided drainage. Data regarding initial technical success as well as long-term outcome was recorded in each case. RESULTS: In total, five patients were identified who underwent CT guided abscess drainage related to retained appendicoliths. There were three males and two females (age range 12-54 years). Initial drainage under CT guidance was technically successful in all cases with successful catheter placement and resolution of the abscess cavity. In all five cases however, there was recurrence of abscess formation following catheter removal. In one case, a second attempt with CT guided drainage was performed. Again this was initially successful with abscess recurrence following catheter removal. In all five cases, formal surgical drainage with removal of retained appendicolith resulted in a successful outcome. CONCLUSION: CT guided percutaneous drainage of intra abdominal abscess secondary to retained appendicoliths is only successful in the short term. Formal surgical drainage and removal of the appendicolith is required for long-term success.
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Although drainage is considered the gold standard in abscess treatment, abscesses of different sizes and locations have been successfully cured by means of antibiotic treatment alone. The penetration of an antibiotic into an encapsulated purulent lesion is limited and highly dependent on the degree of abscess maturation. In fact, in vivo pharmacokinetic data demonstrate that substantial antibiotic concentrations can be reached within abscesses in humans and animals, provided the choice of an appropriate agent and an optimal dosing regimen. However, the efficacy of antibiotics in pus may be hampered by various factors like low pH, protein binding and degradation by bacterial enzymes. This article provides a comprehensive review on conservative abscess treatment, presenting clinical data on success rates of antibiotic therapy. Antibiotic concentrations measured in abscesses of humans and animals are outlined, and theoretical considerations on the understanding of pharmacokinetics and efficacy of antibiotics in abscesses are discussed.