Pulmonary tumours derived from embryologically displaced or ectopic tissues

Atypical Fibroxanthoma

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These tumors are normally seen in other areas of the body. They are not expected to arise within the lung, due to the absence of their parent tissues within normal lung parenchyma.

It is therefore, thought that the origin of these tumors is from embryologicaly displaced or ectopic tussues, such as meningothelial rests, thymic epithelium, glomus cells, and neuroendocrine derivatives.

Other tumours include malignant melanoma, ganglioneuroblastomas and germ cell tumours (choriocarcinoma and teratoma).

Primary Intrapulmonary Thymoma

Glomus Tumour of the Lung

Primary Malignant Melanoma of Bronchus

Pulmonary Paraganglioma

Ganglioneuroblastoma of the Lung

Minute Pulmonary Meningothelial-like nodules and Pulmonary Meningioma

Germ Cell Tumours of the Lung (Teratoma and Choriocarcinoma)

Lung tumors derived from ectopic tissues.Semin Diagn Pathol. 1995 May;12(2):172-84.

Ectopic tissues rarely occur in the lung. They include endometriosis, neurological tissue, thyroid, pancreas, and adrenal. Choristomas are very rare developmental anomalies derived from these ectopic tissues. They develop as a mass composed of histologically normal tissues that are heterotopic in the lung. Various intrapulmonary neoplasms also rarely develop from ectopic tissues. They include malignant melanoma, thymoma, meningioma, glomus tumor, germ cell neoplasms (choriocarcinoma and teratoma), and ependymoma. The clinicopathological features of these unusual pulmonary neoplasms are discussed.

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Soft Tissue Pathology;
Myxoid Tumours of Soft Tissue ; Classification of Soft Tissue Tumour; Gross examination of soft tissue specimen ; A practical approach to histopathological reporting of soft tissue tumours ; Grading of soft tissue tumours ; Lipomatous tumours ;Neural tumours ; Myogenic tumours ;Vascular tumours ;Fibroblastic/Myofibroblastic tumours ; Myofibroblastic tumours ; Fibrohistiocytic tumours ; ChondroOsseous tumours ; Soft TissueTumours of Uncertain Differentiation ; Notochordal Tumour -Chordoma ; Extra-adrenal Paraganglioma ; Gastrointestinal Stromal Tumour ;