Classification of Primary Bone Tumors

Abstract

Primary bone tumors are named and classified based upon their histologic differentiation, as reported in the following table. The term “tumor” refers in general to a growing mass and is also used by clinicians for lesions of nonneoplastic nature, such as histiocytic fibroma and osteochondroma, because their basic tissue expresses a recognizable differentiation, such as fibrohistiocytic and cartilaginous. Other growing lesions are usually defined as “reactive” and do not show a recognizable pattern of histologic differentiation. Lymphomas and myeloma are not considered primary bone tumors, deriving from hematopoietic system.

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Primary bone tumors are named and classified based upon their histologic differentiation, as reported in the following Table 4.1. The term “tumor” refers in general to a growing mass and is also used by clinicians for lesions of nonneoplastic nature, such as histiocytic fibroma and osteochondroma, because their basic tissue expresses a recognizable differentiation, such as fibrohistiocytic and cartilaginous. Other growing lesions are usually defined as “reactive” and do not show a recognizable pattern of histologic differentiation. Lymphomas and myeloma are not considered primary bone tumors, deriving from hematopoietic system.

Table 4.1 Classification of primary bone tumors