Spontaneous adrenal hematoma in pregnancy: A case report.

Rational: Spontaneous adrenal hematoma in pregnancy is a very rare condition. Herein we present an additional rare case of unilateral spontaneous adrenal hematoma in a pregnant woman, aiming to share this experience and summarize the signal characteristics of simple adrenal hematoma in magnetic resonance imaging (MRI). Patient concerns: A 28-year old pregnant woman was referred to our hospital with a vague paroxysmal left-side back pain at 17 weeks of gestation. Diagnosis: MR scan of the abdomen revealed an 8.1 x 7.7 x 6.8 cm round mass in the left adrenal region, which showed a rim of acute hemorrhage signal. Due to the stable condition of the patient and fetus, she was admitted for observation. Repeat MR scan was performed a month later, and it showed a stable mass with marginal subacute bleeding signal. Interventions: Laparoscope excision of the hematoma was performed. Outcomes: Simple adrenal hematoma was confirmed by pathological examinations. And the patient was discharged 3 days later with normal renal and adrenal functions. Lessons: The most important characteristic of adrenal hematoma is the high-signal rim on T1-weighted MR images, and the clinicians should make individualized treatment plan for every patient encountered in the future who might have different clinical conditions.