Parathyroid hormone-related protein (PTHrP) expression in ameloblastoma.

Objective: Parathyroid hormone-related protein (PTHrP) production has been demonstrated in a variety of tumor subtypes. Local production of PTHrP by metastatic tumor cells in bone has been linked to bone destruction and tumor growth. Ameloblastoma (AB) is a relatively common odontogenic epithelial neoplasm that manifests local infiltrative intraosseous growth.

Sebaceous carcinoma arising in a mature cystic teratoma of the ovary.

Sebaceous neoplasms arising in dermoid cysts of the ovary are exceedingly rare. We report a well-differentiated sebaceous carcinoma arising in a dermoid cyst in a 39-year-old female, the fourth such case in the literature.