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Atypical pulmonary carcinoid tumor

Last revised by Yuranga Weerakkody on 22 Sep 2022

An atypical pulmonary carcinoid tumor is a more aggressive variant of a pulmonary carcinoid tumor. They are less common and considered intermediate grade neoplasms and have the same “carcinoid morphology,” but with mitotic rates increased (at 2–10 mitoses per 2 mm2) where the tumor might also be punctuated with necrotic features.

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