Pathology: calcifying fibrous tumour

Circumscribed; hypocellular; spindle cells with vague fascicular pattern

Eosinophilic cytoplasm with elongated processes

Monomorphic ovoid nuclei with small nucleoli; inconspicuous mitotic activity

Abundant hyalinized collagenous stroma; abundant psammomatous calcification

Lobulated; hypocellular; spindle cells with vague fascicular pattern

Eosinophilic cytoplasm with elongated processes

Monomorphic ovoid nuclei with small nucleoli; inconspicuous mitotic activity

Abundant hyalinized collagenous stroma; irregularly interspersed psammomatous calcification

Circumscribed; hypocellular; spindle cells with vague fascicular pattern

Eosinophilic cytoplasm with elongated processes

Monomorphic ovoid nuclei with small nucleoli; inconspicuous mitotic activity

Abundant hyalinized collagenous stroma (calcification not present in this section)