Bizarre parosteal osteochondromatous proliferation (BPOP) is a benign disorder within a spectrum of reactive proliferative processes of tubular bones, particularly the phalanges of the fingers or toes. The cause is unknown, and it is difficult to distinguish BPOP from a bone or soft tissue tumor. The radiographic and magnetic resonance imaging manifestations of reported BPOP cases are mostly nonspecific. We present herein a case of BPOP with unique computed tomography features that enabled us to make a prospective diagnosis of BPOP for appropriate surgical planning.