Intracranial hemorrhage (ICH) in acute leukemia (AL): A single-center study from a general hospital with two cases managed with middle meningeal artery (MMA) embolization.

Abstract

e19033 Background: ICH is a devastating and potentially fatal complication in patients with AL. Contributing factors for ICH include thrombocytopenia, hyperleukocytosis, and coagulopathy. Acute promyelocytic leukemia (APL) has a higher risk of disseminated intravascular coagulation (DIC) and fatal ICH, contributing to early deaths from the disease. At our institution, we have incorporated MMA embolization into traditional methods of observation and surgery for the management of ICH in AL patients. Methods: We performed a single-center retrospective study of adult AL patients with ICH at Memorial Hermann Hospital Texas Medical Center from January 1, 2013, to December 31, 2022. Data collected included: age at diagnosis, type of AL, white blood cell count (WBC), platelet count, coagulation profile, Glasgow Coma Scale score at presentation, response to platelet transfusion, need for surgical, minimally invasive intervention, and mortality rates at 72 hours and 30 days. Descriptive statistics were used to analyze the data. Results: Among 160 consecutive AL patients, we identified 22 (13.75%) with ICH at presentation (APL = 11, AML = 6, B-ALL = 3, Burkitt leukemia = 1, myeloid sarcoma = 1). All were newly diagnosed except for one (an intracranial relapse of AML). Median age was 54 (range, 20–82) years; 60% were women. Subject races included white (n = 10), Asian (n = 5), Hispanic (n = 2), African American (n = 2), and others (n = 3). Median WBC count at admission was 23 (range, 0.2–400) × 109/L. Thrombocytopenia (platelet levels < 50,000/μL) was present in 16 patients (72%), and 3 had platelet counts < 10,000/μL. Twelve patients (54%) had evidence of DIC. Sites of ICH included intraparenchymal (n = 8), subarachnoid (n = 3), subdural (n = 10), cerebellum (n = 1). In 3 patients, ICH extended into the ventricles. Three patients had ≥2 types of ICH. Three patients had middle cerebral artery ischemic stroke in addition to ICH. One patient with myelofibrosis and myeloid sarcoma had bilateral subdural hematomas (SDHs) on admission and developed a fatal basal ganglia ICH during induction chemotherapy. All APL patients were promptly started on all-trans retinoic acid. Two patients had refractory thrombocytopenia. Five patients required craniotomy, with 2 deaths from recurrent ICH. Two patients with SDH underwent MMA embolization with favorable outcomes. Four patients (18%) died within 72 hours of admission (APL = 3, AML = 1). The 30-day mortality rate among patients presenting with ICH was 31% (n = 7). Conclusions: ICH in AL continues to be a major cause of mortality and morbidity. Early diagnosis, transfusion support, correction of coagulopathy, and neurosurgical expertise are critical in improving outcomes in AL-associated ICH. MMA embolization is a new, minimally invasive strategy for the management of SDH in these critically ill patients.