Bilateral Adrenal Infarction as an Uncommon Complication of Heparin-Induced Thrombocytopenia: A Case Report

BACKGROUND Heparin-induced thrombocytopenia (HIT) is an immune-mediated reaction that occurs 5-10 days after heparin exposure. Antibodies against platelet factor 4 (PF4) activate platelets and lead to a hypercoagulable state, causing thrombotic complications, including deep venous thrombosis, pulmonary embolism, stroke, and myocardial infarction. Given the widespread use of prophylactic heparin in clinical practice, prompt recognition and management are crucial due to the associated high morbidity and mortality. CASE REPORT A 73-year-old woman with hypertension, hypothyroidism, depression, and anxiety presented with 6 days of nausea, vomiting, abdominal pain, constipation, weakness, and postural dizziness. She recently underwent cervical spine surgery and received prophylactic heparin. Laboratory findings showed normocytic anemia, mild leukocytosis, new-onset thrombocytopenia, and hyponatremia. Further evaluation revealed low morning cortisol, positive PF4 antibodies, and serotonin release assay (SRA), consistent with HIT. CT demonstrated bilateral adrenal enlargement and peripheral fat stranding, confirming adrenal infarction. Discontinuation of heparin and treatment with rivaroxaban, intravenous steroids, and hemodynamic support led to significant improvement. CONCLUSIONS HIT-induced adrenal infarction is uncommon and often overlooked due to its nonspecific presentation. This case emphasizes the importance of suspecting adrenal involvement in patients with prior heparin exposure and hypotension or electrolyte imbalance. Prompt anticoagulant adjustment, steroid replacement, and follow-up with hemodynamic monitoring can improve clinical outcomes.

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A 73-year-old woman developed bilateral adrenal infarction as an unusual manifestation of heparin-induced thrombocytopenia following cervical spine surgery. Heparin cessation, rivaroxaban anticoagulation, intravenous steroids, and hemodynamic support produced significant clinical improvement.

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