Cite this page: Roychowdhury M. Atypical adenoma. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/parathyroidatypicaladenoma.html. Accessed January 17th, 2020.
- Has some features of malignancy (broad fibrous bands crossing the tumor, trabecular growth, pseudocapsular invasion [clusters of parathyroid cells trapped within the capsule in 50%]) but no vascular invasion, no metastases, rarely increased mitotic activity (Hum Pathol 2003;34:54)
- Unpredictable clinical behavior
- 63 year old woman with ectopic atypical parathyroid lipoadenoma (J Bone Miner Metab 2013;31:595)