Preoperative Evaluation and Management of Myelofibrosis Patients Undergoing Splenectomy

Critical Preoperative Requirements

The American Society of Clinical Oncology recommends cytoreductive therapy before surgery to prevent postoperative extreme thrombocytosis, which significantly increases thrombotic complications 1, 2
Maintain platelet count strictly below 400 × 10⁹/L using hydroxyurea or other cytoreductive agents 1, 2
Severe thrombocytopenia (<100 × 10⁹/L) is a marker of impending leukemic transformation and significantly worsens postoperative survival—reconsider surgical candidacy in these patients 1

The Centers for Disease Control and Prevention recommends all patients receive immunization against encapsulated bacteria at least 14 days before elective splenectomy 3, 4, 5
Required vaccines include: polyvalent pneumococcal (23-valent), meningococcal C conjugate, and Haemophilus influenzae type B 3, 5
Arrange lifelong prophylactic antibiotics (phenoxymethylpenicillin or erythromycin if penicillin-allergic) starting immediately postoperatively 3

The American College of Chest Physicians recommends initiate prophylactic anticoagulation with low molecular weight heparin (LMWH) as a preoperative measure 1, 2, 5
Extended prophylaxis with LMWH should continue postoperatively given the high-risk nature of splenectomy 6

Poor performance status—patient must have adequate functional capacity to tolerate major surgery 1
Clinical or laboratory evidence of disseminated intravascular coagulation (DIC)—this is an absolute contraindication 1
Active infection of any kind 5

An experienced surgical team is mandatory given the complexity and high complication rates 1
Multidisciplinary coordination with hematology, anesthesiology, and perioperative medicine teams is essential 6, 5

Aggressive surveillance for arterial or venous thrombosis symptoms 6
Monitor for extreme thrombocytosis and initiate immediate cytoreduction if platelet count rises rapidly 1
Implement mechanical prophylaxis (sequential compression devices) immediately and continue throughout hospitalization 5
Lifelong risk of overwhelming post-splenectomy infection (OPSI) with mortality rates approaching 50% for pneumococcal sepsis 5
Educate patient that any fever >38°C (101°F) requires immediate emergency department evaluation 5
Provide home supply of antibiotics for immediate use if fever develops 3, 5
Reimmunization recommended every 5-10 years 3