]> 2026-07-31T11:51:19+00:00 WBR0765 0 en Spindle-shaped cells with multi-nucleated giant cells Giant cell tumor (osteoclastoma) is characterized by spindle-shaped cells with multi-nucleated giant cells. "Chinese characters" made of bone trabeculae Fibrous dysplasia of bone is characterized by "Chinese characters", which are curvilinear trabeculae made of bone trabeculae. Small blue anaplastic cells Ewing's sarcoma is characterized by small blue anaplastic cells. High-grade spindle cells that produce osteoid matrix with no cartilage connections Osteoid sarcoma is characteriezd by high-grade spindle cells that produce osteoid matrix with no cartilage connections. Small circumscribed irregular trabeculae and sclerotic nidus of woven bone Osteoid osteoma is characterized by small circumscribed irregular trabeculae and sclerotic nidus of woven bone. Pathology A 14-year-old girl is brought by her mother to the physician's office for facial asymmetry and a limp on the right side. Her past medical history is significant for McCune-Albright syndrome. Physical examination is remarkable for facial asymmetry, breast enlargement, and multiple cafe-au-lait spots on her skin. X-ray of the right proximal femur demonstrates a "ground glass" appearance and findings consistent with a "shepherd's crook" deformity. The physician explains that the patient's condition is caused by a disease of the bone marrow stromal cells with abnormal production of fibro-osseous masses of tissue. Biopsy of the bone lesions will most likely show which of the following findings? B Musculoskeletal/Rheumatology 2020-10-28T01:38:06Z 2459150.568125 WBR0765