PMC6216084_01
Retroperitoneal mass over right iliacus muscle.. Contrast enhanced CT scan of abdomen showing homogeneous, vascular, well defined retroperitoneal solid mass overlying right iliacus muscle (arrow).
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Contrast enhanced CT of the abdomen (Fig. 1) showed homogeneous, vascular and well defined retroperitoneal solid mass overlying right iliacus muscle; suggestive of a benign neurogenic tumour.
Hyaline vascular variant of Castleman disease.. Histopathology shows atrophic germinal centre with vessel traversing through it: "lollypop appearance" (black arrow). The expanded mantle zone shows concentric rings of small lymphocytes: "onion skin appearance"- hyaline vascular variant of Castleman disease.
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Histopathology (Fig. 2) showed atrophic germinal centre with vessel traversing through it: "lollypop appearance".
PMC6216084_02