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.

Reference:

C.M. Chao, C.C. Lai, Cannon ball pulmonary metastases, QJM: An International Journal of Medicine, Volume 108, Issue 10, October 2015, Page 843, https://doi.org/10.1093/qjmed/hcv097