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Desmoplastic fibroblastomas are benign and uncommon soft-tissue tumors. They are typically slow-growing, painless masses found in adult men. Rapidly growing masses have been previously reported, but are more rare. A 56-year-old man presented with a rapidly growing mass in his left foot, which was diagnosed as a desmoplastic fibroblastoma after pathologic evaluation. Although many case reports have been published in the dermatology literature, it is important to be aware of this benign neoplasm to avoid confusion with other rapidly growing malignant soft-tissue masses reported in the podiatry literature.