Management of Splenic Infarction

Diagnosis

CT scan with intravenous contrast is the gold standard for diagnosing splenic infarction, with sensitivity and specificity of 90-95% 1, 2, 3
On CT, splenic infarcts typically appear as peripheral low-density, wedge-shaped areas, while abscesses appear as single or multiple contrast-enhancing cystic lesions 2, 3
MRI offers similar diagnostic accuracy to CT for splenic infarction 2, 3
Ultrasonography may be used but is less sensitive; infarcts may not be visualized well, while abscesses appear as sonolucent lesions 2, 3
Older imaging techniques such as 99mTc liver-spleen scans, labeled white blood cell scans, and gallium scans are now considered obsolete for diagnosing splenic pathology 2, 3

Clinical splenomegaly is present in up to 30% of cases but is not a reliable sign of splenic infarction 2, 3
Persistent fever, recurrent bacteremia, or other signs of sepsis should raise suspicion for progression to splenic abscess 2, 3

Splenic rupture with hemorrhage is a rare complication of splenic infarction 2
Pseudocyst formation is a potential complication of splenic infarction 4
Differentiation between uncomplicated infarction and abscess can be made based on clinical and radiographic improvement with appropriate therapy, with ongoing sepsis, recurrent positive blood cultures, and persistence or enlargement of splenic defects on imaging suggesting abscess formation 2

Splenectomy is indicated for development of splenic abscess 2
Splenectomy is also indicated for failed non-operative management with continued hemodynamic instability 4

In trauma patients with splenic infarction, management follows trauma protocols based on hemodynamic stability and grade of injury 5
Non-operative management is preferred in hemodynamically stable patients 4

The European Society of Cardiology recommends that most splenic infarcts should be managed conservatively with supportive care, reserving splenectomy only for life-threatening complications such as splenic rupture, abscess formation, or persistent hemorrhage 6
Monitoring hemodynamic stability with frequent vital signs and serial hematocrit measurements is crucial in the management of splenic infarction 7, 8
Implementing clinical and laboratory observation with bed rest for the first 48-72 hours is recommended, particularly in moderate to severe lesions 8
Watching for signs of complications, including persistent or recurrent fever, ongoing abdominal pain, and bacteremia, is essential to identify progression to splenic abscess or rupture 6

Splenic rupture with hemorrhage and hemodynamic instability is an absolute indication for surgical intervention 6
Splenic abscess formation that responds poorly to antibiotics alone is an absolute indication for surgical intervention 6
Failed non-operative management with continued hemodynamic instability or significant drop in hematocrit requiring continuous transfusions is an absolute indication for surgical intervention 7, 8

Percutaneous drainage may be considered for splenic abscesses in high-risk surgical candidates 6

In patients with hematologic malignancies, such as CML, cytoreductive therapy can lead to successful regression of splenic infarction without surgical intervention 9
In patients with infective endocarditis, splenectomy should be performed before valvular surgery unless cardiac surgery is urgent 6
In trauma settings, management follows trauma protocols based on hemodynamic stability and injury grade 7, 8

Doppler ultrasound should be added to evaluate splenic vascularization and detect vascular complications, as recommended by the World Journal of Emergency Surgery 10
The American Heart Association, as cited in Circulation, recommends that bland infarcts appear as peripheral wedge-shaped low-density areas on CT, while abscesses show contrast-enhancing cystic lesions 11
Monitor for progression to abscess: persistent fever, recurrent bacteremia, or enlargement of defects on serial imaging indicate abscess formation requiring different management, according to the American Heart Association, as cited in Circulation 11
Infarcts typically improve clinically and radiographically with appropriate treatment of the underlying cause, as stated by the American Heart Association, as cited in Circulation 11

Serial clinical examination and laboratory monitoring with immediate access to surgery and blood products is essential, as recommended by the World Journal of Emergency Surgery 12, 10
Splenectomy is absolutely indicated for splenic abscess formation that responds poorly to antibiotics alone, according to the American Heart Association, as cited in Circulation 11
Persistent symptoms with complications including hemorrhage, pseudocyst formation, or organ-threatening conditions require urgent surgical intervention, as stated by the Leukemia journal 13
In hematologic malignancies, cytoreductive therapy can lead to successful regression without surgery, as recommended by the Leukemia journal 13
In infective endocarditis, perform splenectomy before valve replacement surgery unless cardiac surgery is urgent, to prevent prosthetic valve infection, according to the American Heart Association, as cited in Circulation 11
Percutaneous drainage may be considered for splenic abscesses in high-risk surgical candidates who cannot tolerate splenectomy, as recommended by the American Heart Association, as cited in Circulation 11
Laparoscopic splenectomy is an alternative to formal laparotomy when surgery is required, according to the American Heart Association, as cited in Circulation 11

Do not rely on clinical splenomegaly as a reliable indicator of infarction severity, as stated by the American Heart Association, as cited in Circulation 11
Avoid nuclear medicine scans as they are obsolete and provide no diagnostic value, according to the American Heart Association, as cited in Circulation 11

The American College of Cardiology recommends initiating anticoagulation immediately after excluding hemorrhagic complications in patients with atrial fibrillation and splenic infarction 14
Antiphospholipid antibodies are a thrombophilic condition that can contribute to splenic infarction 15
The American College of Cardiology suggests using direct oral anticoagulants (DOACs) over warfarin due to lower bleeding risk, with a target INR of 2.0-3.0 if warfarin is used 16
The American College of Cardiology recommends adding a proton pump inhibitor when using anticoagulation to reduce GI bleeding risk 16, 17
For sickle cell disease, chronic blood transfusions to reduce hemoglobin S to <30% of total hemoglobin can help manage splenic infarction 15