Signet Ring Cell Carcinoma Key Facts Terminology Synonym: Adenocarcinoma with signet ring cells Definition Non-small cell carcinoma with signet ring cells similar to those described in gastrointestinal tract Clinical Issues…
Bronchioloalveolar Cell Carcinoma Key Facts Terminology Bronchioloalveolar cell carcinoma (BAC) Adenocarcinoma with BAC pattern and no evidence of stromal, vascular, or pleural invasion Essentially, current definition is that of in…
Clear Cell “Sugar” Tumor (PEComa) Key Facts Terminology Benign intrapulmonary neoplasm with prominent clear cells Etiology/Pathogenesis Myo-melanocytic differentiation (PEComa) Clinical Issues Although tumor is more common in adults, it has…
Sclerosing Hemangioma (Pneumocytoma) Key Facts Terminology Pneumocytoma Etiology/Pathogenesis Tumor appears to have pneumocytic differentiation, yet histogenesis remains unclear Clinical Issues Incidence More common among women Tumor is more common in…
Granular Cell Tumor Key Facts Terminology Granular cell tumor (GCT) Benign neoplasm composed of medium-sized cells with prominent granular cytoplasm Malignant counterpart shows similar histology but with nuclear atypia and…
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 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…
