Abstract
BACKGROUND: Vaccinations have been widely used worldwide since their invention to prevent various diseases, but they can also have some adverse effects ranging from mild local reactions to serious side effects. These adverse effects are generally self-limited and resolve within a short time without any treatment. While a sterile abscess following vaccination is a rare condition in adults, many cases have been reported regarding children in the literature. Here, we report a case of recurrent sterile abscesses, which occurred after a Td vaccination, treated with corticosteroids. CASE PRESENTATION: A 22-year old woman was admitted to our department with a complaint of swelling at the site of the vaccination. On physical examination, this mass was about 6 × 6 cm in size and fluctuating, but there were no pain complaints and no redness present. She had received her Td vaccination 3 weeks ago and the swelling had started at the site of the injection 4 days following this immunization. Oral amoxicillin/clavulanic acid and local antibiotic cream were administered for 10 days. The laboratory values were unremarkable. Despite the administration of antibiotics, the swelling did not regress, and on the contrary, continued to increase in size. On ultrasound, two interconnected abscesses were observed in the subcutaneous area, and did not involve the muscle tissue. Later, the abscesses were completely drained, and the samples were cultured. The current antibiotics were continued. The gram staining of the samples revealed abundant leukocytes but no microorganisms. The solid and liquid cultures of the materials remained negative. Despite the administration of multiple drainages and antibiotics, the mass recurred. Finally, the patient was considered to have a sterile abscess due to Td immunization. The antimicrobials were stopped. Local and oral corticosteroids were initiated. The swelling regressed significantly, and the treatments continued for 7 days. The patient has been doing well and has had no recurrence for over a year. CONCLUSIONS: Corticosteroids appeared to improve the patient and therefore we suggest that the efficacy and route of administration of steroids in this situation should be explored further.