Miscellaneous Adrenal Neoplasms (Cysts, Myelolipoma, Hemangioma, Lymphangioma)

Richards, Melanie L.

doi:10.1007/3-540-26861-8_22

Cited by 2 publications

(1 citation statement)

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“…Most adrenal cysts are nonfunctional and usually asymptomatic. In 1966, Foster has classically divided adrenal cysts into four types: endothelial cysts (24%–45%), pseudocysts (39%–56%), epithelial cysts (6%–9%), and parasitic cysts (2%–7%) [2] . The etiology of pseudocysts remains unclear; however, immunohistochemical and electron microscopy studies have suggested that both pseudocysts and endothelial cysts are vascular in origin and variants of vascular adrenal cysts [1] .…”

Section: Introductionmentioning

confidence: 99%

A collision between vascular adrenal cyst and adrenocortical adenoma

Tagawa

Yamada

Miyakawa

et al. 2021

Radiology Case Reports

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We report a patient with sigmoid colon cancer who revealed a unique collision of hemorrhagic vascular adrenal cyst and adrenocortical adenoma with myelolipomatous changes. Two months before referral to our hospital, anticoagulant therapy was started for acute myocardial infarction. The components of the adrenocortical adenoma demonstrated a typical signal drop in opposed-phase magnetic resonance (MR) images although macroscopic fat was also depicted both on CT and MR images. The components of the vascular adrenal cyst demonstrated peripheral nodular enhancement with progressive enhancement on dynamic contrast-enhanced CT and a hemorrhagic change in the central region, which showed hyper intensity on T1-weighted images (T1WI) and hypo intensity on T2-weighted images (T2WI). Microscopically, the cyst was filled with foci of hemorrhage, fibrin, fibrosis, and hemosiderin. Furthermore, a white thrombus was found that corresponded to the central low signal intensity depicted on T2WI. Dilated vascular channels that were immunohistochemically positive for CD31 and CD34 were identified within the cyst. They were consistent with the pathological findings of hemorrhagic vascular adrenal cyst. Radiologists should be aware that the diagnosis of adrenal vascular cyst could be challenging since image findings may resemble hemangiomas, pheochromocytomas, and malignancy.

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Section: Introductionmentioning

confidence: 99%