Coin Lesion

Coin Lesion

A rounded, circumscribed nodule measuring < 4 cm that may be surrounded by well-aerated pulmonary parenchyma, which often—about half of cases identified in the US—appears as an incidental finding in an otherwise unremarkable plain chest X-ray
Diagnosis Age, smoking history, geographic location, history of previous malignancy
Aetiology Infection (abscesses, aspergilloma, bacteria, coccidioidomycosis, echinococcal cysts, Dirofilaria immitis, histoplasmosis, TB), benign masses (bronchial adenoma, chondroma, diaphragmatic hernia, benign mesothelioma), neurogenic tumour, sarcoidosis, sclerosing hemangioma, Wegener’s granulomatosis, rheumatoid nodules; malignant masses—1º lung cancer—which comprise 35%, metastases ± 10%, sarcoma, myeloma, Hodgkin’s disease, choriocarcinoma

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coin lesion

Solitary pulmonary nodule Radiology A rounded, circumscribed nodule measuring < 4 cm that may be surrounded by well-aerated pulmonary parenchyma, which often appears as an incidental finding in an otherwise unremarkable plain CXR; ±50% of CLs in the US Diagnosis
Age, smoking Hx, geographic location, Hx of previous malignancy Etiology Infection–abscesses, aspergilloma, bacteria, coccidioidomycosis, echinococcal cysts, Dirofilaria immitis, histoplasmosis, TB, benign masses– bronchial adenoma, chondroma, diaphragmatic hernia, benign mesothelioma, neurogenic tumor, sarcoidosis, sclerosing hemangioma, Wegener's granulomatosis, rheumatoid nodules; malignant masses–1º lung CA, which comprise ≥ 35%, metastases ± 10%, sarcoma, myeloma, Hodgkin's disease, choriocarcinoma