Parathyroid gland
Neoplasms
Atypical adenoma

Author: Monika Roychowdhury, M.D. (see Authors page)

Revised: 12 April 2018, last major update January 2013

Copyright: (c) 2003-2018, PathologyOutlines.com, Inc.

PubMed Search: Atypical adenoma parathyroid full text[sb]

Cite this page: Roychowdhury, M. Atypical adenoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/parathyroidatypicaladenoma.html. Accessed July 21st, 2018.
Clinical features
  • 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
Case reports
Microscopic (histologic) images

Images hosted on other servers:

Atypical adenoma
showing characteristic
dense collagenous bands

Atypical adenoma extending close to margins of excision, often due to fibrosis and adherence to adjacent structures