Fig. 12.

Cat scratch disease: 16-year-old female with no known past medical history presented with swelling in her right hand, fever, and enlarged spleen on physical exam after being scratched by her domestic cat. a US image showed an enlarged spleen with a small hypoechoic solid lesion within the parenchyma (arrows). b Axial plane T2W image demonstrated the same lesion as hyperintense focus (arrow). Serologic studies confirmed cat scratch disease, and the lesion disappeared on follow-up imaging