1-4, which had appeared in the above article had already been published in the following paper [Maounis N, Chorti M, Legaki S, Ellina E, Emmanouilidou A, Demonakou M and Tsiafaki X: Metastasis to the breast from an adenocarcinoma of the lung with extensive micropapillary component: a case report and review of the literature. The Editor deeply regrets any inconvenience that this retraction has caused to the readership of the Journal, and to the authors of the previously published paper. [Extracted from the article]