Radiological signs

Question 1

Canonball metastasis in CXR

Answer 1

Renal cell carcinoma
Choriocarcinoma (gestastional malignancy)
Less commonly: prostate cancer, synovial sarcoma, endometrial carcinoma

Question 2

CXR - RIP/PIER ABCDEFGHI

Answer 2

R - rotation
I - inspiration
P - penetrance

P - position
I - inspiration (count posterior ribs)
E - exposure
R - rotation

A - airway
B - bones 
C - cardiac
D - diaphragm
E - effusions, everything else
F - fields
G - great vessels
H - hila & mediastinum
I - impression overall