Cytologic features of primary chondroid tumors of bone in crush preparations.

Fine-needle aspiration biopsy can be utilized effectively in the diagnosis of many bone lesions. Often, these lesions are suspected to be foci of metastatic disease based on clinical and/or radiographic findings. On occasion, microscopic examination of the aspirate yields a diagnosis of a primary neoplasm of chondroid origin. We discuss the cytologic features observed in crush preparations of the most frequently seen primary chondroid tumors of bone and how these lesions can be differentiated from each other and from metastatic lesions.