Cutaneous manifestation of Borrelia burgdorferi infection – a case presentation

<b>Introduction:</b> Lymphocytic lymphoma is a type of cutaneous pseudolymphoma composed of B cells. It is a rare manifestation of <i>Borrelia burgdorferi</i> infection, occurring as a symptom in about 1% of cases. This form of lymphoma is most commonly found in the endemic areas of the <i>Ixodes ricinus</i> tick in Europe and is rarely seen in North America. Additionally, pseudolymphoma of the skin can be an early sign of Lyme disease.<b>Aim:</b> The paper discusses a case involving a 10-year-old boy from Poland with a pseudolymphoma of the skin on the auricle.<b>Case report:</b> A case involves a 10-year-old boy who experienced non-painful swelling of the left auricle, which varied in severity. The child was previously healthy and had not been on any long-term medications. In February 2024, he sustained trauma to the left auricle from a ball strike, but there were no other significant medical events in his history.<b>Conclusions:</b> Although lymphocytic lymphoma is a rare manifestation of Lyme disease, it is essential to ensure accurate diagnosis and treatment. Left untreated, it can result in various long-lasting complications, particularly involving the nervous system, heart, or joints due to the effects of <i>Borrelia burgdorferi</i> spirochetes.