1. WHO Classification of Tumours. Available at: https://tumourclassification.iarc.who.int/chaptercontent/38/71.
2. Lehman K.A., Zynger D.L. Adrenal gland & paraganglia. Available at: https://www.pathologyoutlines.com/topic/adrenaladenomatoid.html.
3. Lack E.E. Tumors of the adrenal gland. In: Diagnostic Histopathology of Tumors. Ed.: C. Fletcher. 3rd edn. Churchill Livingstone Elsevier, 2007. Pp. 1099–122.
4. Delellis R.A., Mangray S. The adrenal glands. In: Sternberg’s Diagnostic Surgical Pathology. Eds.: S.E. Mills, D. Carter, J. Greenson. 5th ed. Lippincott Williams and Wilkins, 2009. Pp. 545–567.
5. Adem C., Schneider M., Hoang C. Pathologic quiz case: an unusual umbilical mass. Arch Pathol Lab Med 2003;127(7):303–4. DOI: 10.5858/2003-127-e303-PQCAUU