File:Atypical carcinoid tumor of lung metastatic to the adrenal gland Case 255 (8268009504).jpg

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A focus of early necrosis is present in the tumor nest in center of the image. Atypical carcinoid tumor of the lung is currently defined as a neoplasm with the neuroendocrine growth pattern that exhibits 2-10 mitosis/10 high power fields or necrosis. No mitoses are seen 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.
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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@N03/8268009504 (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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Date/TimeThumbnailDimensionsUserComment
current07:42, 3 October 2019Thumbnail for version as of 07:42, 3 October 20192,272 × 1,704 (1.49 MB)Netha Hussain (talk | contribs)Transferred from Flickr via #flickr2commons

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