Overview of Malignant Epithelial Neoplasms of the Lung Poorly differentiated non-small cell carcinoma of the lung shows sheets of large, atypical cells with large nuclei and prominent nucleoli and without…
Minute Meningothelial-like Nodule Key Facts Clinical Issues Usually asymptomatic Can present with diffuse, symptomatic bilateral interstitial lung infiltrates (diffuse pulmonary meningotheliomatosis) Lesions most often represent an incidental finding of no…
Pulmonary Meningioma Key Facts Terminology Primary intrapulmonary meningothelial neoplasm Clinical Issues Cough Asymptomatic Lobectomy Wedge excision in small tumors Good prognosis in conventional cases Aggressive behavior in malignant tumors Macroscopic…
Glomus Tumor Key Facts Terminology Synonyms: Glomangioma, glomic tumor Clinical Issues Cough Shortness of breath Asymptomatic Image Findings Coin lesion in intrapulmonary location Central tumor obstructing bronchial lumen Microscopic Pathology…
Intrapulmonary Solitary Fibrous Tumor Key Facts Clinical Issues Cough Chest pain Dyspnea Macroscopic Features Generally well-circumscribed but unencapsulated intraparenchymatous masses Rubbery, whorled, tan-white cut surface Microscopic Pathology Variation of growth…
Intrapulmonary Thymoma Key Facts Clinical Issues Intraparenchymatous location within lung parenchyma; central and peripheral Incidental finding on chest x-ray in 50% of patients Image Findings 0.5-10 cm in greatest dimension…
Pulmonary Paraganglioma Key Facts Clinical Issues Extremely rare tumor in pulmonary location Solitary, peripheral “coin” lesion Central, endobronchial lesion Microscopic Pathology Principal feature is “endocrine” or “organoid” growth pattern Most…
Mucous Gland Adenoma Key Facts Terminology Benign tumor characterized by exuberant enlargement of normal endobronchial glands filled with mucous content above cartilaginous plate Etiology/Pathogenesis Exuberant dilatation and proliferation of normal…
Endobronchial Lipoma Key Facts Terminology Synonym: Lipomatous hamartoma Definition: Benign mesenchymal neoplasm composed exclusively of mature adipose tissue Clinical Issues Cough Shortness of breath Obstructive pneumonia Lipomas are more commonly…
Alveolar Adenoma Key Facts Terminology Benign intraparenchymal lung tumor Etiology/Pathogenesis Although the etiology of this tumor is not completely understood, it may originate from pneumocytes Clinical Issues General features Unusual…
