File:Atypical carcinoid tumor of lung metastatic to the adrenal gland Case 255 (8268010336).jpg

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HIgher magnification view showing the trabecular growth pattern with the tumor cells being somewhat pleomorphic but have finely granular nuclear chromatin and non-prominent nucleoli. No mitoses or necrosis are present in this image.

The term atypical carcinoid may be somewhat misleading since it may give the impression of a low grade of malignancy when if fact these are fully malignant neoplasms in which distant metastases are present in about 20% of patients at presentation and the disease free survival after 10 years is about 50%. An alternate name - neuroendocrine carcinoma grade 2 - has been suggested. I believe that this is preferable to atypical carcinoid but others are unwilling to accept this terminology.
Date
Source Atypical carcinoid tumor of lung metastatic to the adrenal gland Case 255
Author Yale Rosen from USA

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This image was originally posted to Flickr by Pulmonary Pathology at https://flickr.com/photos/30950973@N03/8268010336 (archive). It was reviewed on 3 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-sa-2.0.

3 October 2019

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current07:42, 3 October 2019Thumbnail for version as of 07:42, 3 October 20192,048 × 1,536 (2.35 MB)Netha Hussain (talk | contribs)Transferred from Flickr via #flickr2commons

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