Adrenal adenoma

Case contributed by Dr Ammar Haouimi


Incidental finding of a right adrenal mass on an ultrasound done for right upper abdominal with hepatomegaly.

Patient Data

Age: 65 years
Gender: Female

​Hepatomegaly (21 cm) with diffuse hepatic steatosis (mean attenuation = 24 HU), 20 HU less than that of spleen (mean attenuation = 44 HU) in keeping with diffuse hepatic steatosis.

Small well-defined ovoid homogeneous mass (measuring 28 x 25 x 23 mm) of the right adrenal gland with a mean attenuation = - 11 HU, in keeping with an adrenal adenoma (incidental finding).

Annotated image

Annotated images showing the mean attenuation of

  • adrenal mass = -11HU
  • liver = 24 HU
  • spleen = 44 HU

Case Discussion

CT features of a right adrenal adenoma in a patient with diffuse hepatic steatosis.

On non-contrast CT, a small round, or ovoid homogeneous adrenal lesion with an attenuation <0 HU is considered 100% specific for adrenal adenoma.

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