A 37-year-old woman comes to the physician for a tender 4-mm nodule on her arm. 2 months ago, she required sutures after cutting herself against her backyard fence while playing soccer with her son. A photomicrograph of a biopsy of the nodule is shown. Which of the following is the most likely explanation for this finding?
Amyloid
Granulation tissue
Granuloma
Neutrophilic infiltrate
Plasma cell infiltrate
