Image Challenge – April 17th

Reference here – no peeking!

Question: What is the name of this finding seen on chest X-ray and CT below? Name one etiology on your differential diagnosis.

Answer: The name for this is cannon-ball lung nodules. An important leading diagnosis here is metastases from a primary malignancy such as choriocarcinoma or renal cell carcinoma.


C.M. Chao, C.C. Lai, Cannon ball pulmonary metastases, QJM: An International Journal of Medicine, Volume 108, Issue 10, October 2015, Page 843,

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