Circumscribed
Polygonal-stellate cells with pale amphophilic cytoplasm, set within lacunae
Small round-ovoid nuclei with irregular contours, hyperchromasia and occasional binucleation
Abundant hyaline matrix; metaplastic bone
Circumscribed
Polygonal-spindle cells with pale eosinophilic cytoplasm; frequently set within lacunae
Small round-ovoid nuclei with irregular contours, hyperchromasia and occasional binucleation
Abundant hyaline matrix
Circumscribed
Polygonal cells with pale eosinophilic cytoplasm, set within lacunae
Small round-ovoid nuclei with irregular contours, hyperchromasia and occasional binucleation
Abundant hyaline matrix