Histological findings of the adrenal cyst (HE stain). a) Case 3. A multilocular cyst is found in the adrenal cortex. The cyst is lined with cuboidal to flat epithelial cells and contains eosinophilic hyalinized materials. Scale bar = 200 µm. b) Case 7. Small ducts with cuboidal epithelia (arrows) adjacent to a cyst (asterisk). Scale bar = 50 µm. c) Case 10. The luminal surface of the cyst lacks epithelial lining, and a loose connective tissue is observed on the luminal surface (arrowheads). Adrenal cortical cells are observed beneath the connective tissue (asterisk). Scale bar = 200 µm. d) Case 10. A dilated lymphatic vessel (asterisk) is found around the cyst. Scale bar = 200 µm.