Why couldn't it be retroperitoneal idiopathic fibrosis?
Recognize this is adrenal insufficiency. The key is that both adrenals are dec in size. From FA 2018 ChronicโAddison disease. Due to adrenal atrophy or destruction by disease (autoimmune destruction most common in the Western world; TB most common in the developing world).
Primary renal insufficiency; chronic cause; Addison disease (FA 332)
submitted by โseagull(1933)
THis question is just critical thinking. The adrenals are bilaterally and symmetrically small. All other answer choices are not likely to be even bilaterally. Cancer won't equally spread in perfect symmetry nor infectious causes while maintaining the adrenal architecture.