In medicine, a desmoplastic fibroma is a benign, but locally aggressive, fibrous and rare tumor of the bone, affecting children and young adults, potentially resulting in cortical bone destruction. It usually affects craniofacial bones, mandible most frequently, long bones (metaphyseal femur, tibia, humerus).Although it does not tend to metastatize, it has a high local recurrence and infiltrative growth. [Source: Wikipedia 
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