An extremely preterm neonate developed a progressively worsening right axillary ulcerative lesion at the previous site of a temperature probe. Despite treatment with broad-spectrum antibiotic and antifungal therapy. the lesion worsened and required extensive surgical debridement. Histologic examination of the debrided tissue demonstrated the presence of invasive mucormycosis. https://cuttingedgecutleryco.shop/product-category/rescue-tool/