Subcapsular splenic hematoma
Subcapsular splenic hematomas are a type of splenic hematoma that occurs beneath the splenic capsule.
They can occur in both traumatic and non-traumatic situations.
- abdominal: splenic trauma , a subcapsular hematoma is part of imaging criteria for grades I-III of the AAST splenic injury grading system
- infectious mononucleosis
- cocaine use
Imaging in the portal venous phase is best for detection. CT typically shows a crescentic/lenticular perisplenic collection where attenuation values depend on the age of the hematoma. The hematoma may flatten or indent
the lateral margin of the spleen .
- acute: hyperattenuating to isoattenuating , then called subcapsular hemorrhage
- subacute: iso attenuating, within 1-2 days of bleeding, CT attenuation values of splenic hematomas may be equal to or greater than that of the splenic
- established/chronic: hypoattenuating