Spleen
Other tumors
Ectopic adrenal myelolipoma


Topic Completed: 1 January 2014

Revised: 19 March 2019

Copyright: 2003-2019, PathologyOutlines.com, Inc.

PubMed Search: Ectopic adrenal myelolipoma

Vijay Shankar, M.D.
Page views in 2018: 191
Page views in 2019 to date: 121
Cite this page: Shankar V. Ectopic adrenal myelolipoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/spleenectopicadrenalmyelolipoma.html. Accessed June 24th, 2019.
Definition / general
  • Myelolipoma is rare benign tumor of mature lipomatous and hemopoietic tissue, mature or immature myeloid, erythroid and megakaryocytic cells; more common in adrenal gland
  • Rarely part of generalized myelolipoma
Epidemiology
  • Can occur in any age group
Pathophysiology
  • May be due to misplaced myeloid cells during embryogenesis, followed by hyperplasia
Clinical features
  • Usually an incidental finding
  • Rarely presents with symptoms, usually due to large size or abdominal pain
Radiology images

Images hosted on other servers:

Large well circumscribed soft tissue masses

Intrasplenic myelolipoma

Case reports
Treatment
  • Surgical excision
Gross description
  • Yellow-tan to red-tan, circumscribed mass surrounded by rim of dark red splenic parenchyma
  • Color of cut surface depends on relative distributions of fat, blood and blood forming cells
Gross images

Images hosted on other servers:

Horizontal section of spleen

Resected extra-adrenal myelolipoma

Microscopic (histologic) description
  • Well encapsulated foci of extramedullary hematopoesis that also contain fat, smooth muscle, bone marrow cells
Microscopic (histologic) images

Images hosted on other servers:

Adipocytes and bone marrow elements

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