The histopathologic evaluation of the biopsy revealed the presence of pink pale grains in the dermis. These grains consisted of finely-branched filamentous organisms and were surrounded by mixed inflammatory cells, including neutrophils. Additionally, a layer of chronic inflammatory cells surrounded the organisms. The filamentous organisms were visible and were highlighted by the PAS stain. Furthermore, the presence of multinucleated giant cells among the inflammatory cells was also identified in Figure 3. Based on these histopathologic findings, a suspicion of mycetoma and eumycetoma arose, prompting the request for a culture to detect the microbial organism. The culture results later confirmed the diagnosis of actinomycosis, as it was consistent with the histopathologic findings.