ABFAS bone tumors questions with correct answers

geographic lesions - Correct Answer-1. Least aggressive pattern 2. Indicative of slow growing lesion 3. Uniquely well-defined sclerotic margin that is separated from surrounding bone 4. Usually benign lesions such as giant cell tumors, bone cysts, and enchondromas 5. Short zone of transition from tumor changes to regular bone Moth eaten lesion - Correct Answer-1. Lacks a definitive shape 2. Faster growth than geographic pattern which indicates malignancy 3. Seen more commonly in cancellous bone 4. Multiple small lesions lacking definitive shape 5. These lesions have less well-defined sclerotic margins 6. Long zone of transition from abnormal to normal bone permeative bone lesion - Correct Answer-1. Usually seen in cortical bone 2. Aggressive lesions with very rapid growth potential suggesting malignancy 3. Less well-defined margins not easily separated from surrounding normal bone 4. May be imperceptibly merged with uninvolved segment 5. Long zone of transition from abnormal to normal bone Central: bone tumors within the medullary canal