Unicentric Adrenal Castleman Disease Mimicking an Adrenal Tumour

Figures

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  Figure 1. CT scan demonstrating a well-defined homogeneous soft-tissue-density mass (arrow) arising from the right adrenal gland, with maximum dimensions of approximately 55 × 40 mm.

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  Figure 2. CT scan demonstrating a well-defined homogeneous soft-tissue-density mass with central calcification (arrow) in the right adrenal gland.

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  Figure 3. CT scan demonstrating a well-defined right adrenal mass (arrow) extending posterior to the right renal hilar vessels.

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  Figure 4. Histopathological examination showing lymphoid follicles with expanded mantle zones and a characteristic “onion-skin” arrangement surrounding atretic germinal centres, consistent with hyaline vascular-type Castleman disease (H&E stain, ×4 magnification).

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  Figure 5. Histopathological section demonstrating regressed germinal centres with concentric layering of mantle zone lymphocytes (“onion-skinning”) and prominent hyalinised penetrating vessels, characteristic of hyaline vascular Castleman disease (H&E stain, ×10 magnification).

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  Figure 6. High-power histopathological view showing an atretic germinal centre penetrated by a hyalinised blood vessel (“lollipop” appearance) with concentric mantle zone layering, characteristic of hyaline vascular Castleman disease (H&E stain, 40x magnification).