Skin nonmelanocytic tumor

Lymphoma and related disorders (see also Lymphoma chapter)

Other

Leukemia cutis



Topic Completed: 1 June 2012

Minor changes: 19 October 2021

Copyright: 2003-2021, PathologyOutlines.com, Inc.

PubMed search: Leukemia [title] skin

Christopher S. Hale, M.D.
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Cite this page: Hale CS. Leukemia cutis. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/skintumornonmelanocyticleukemias.html. Accessed December 4th, 2021.
Definition / general
  • Skin involvement ("leukemia cutis") occurs in 5% with CML, 8% with CLL, 10% with monocytic leukemia
  • Myeloid leukemia with monocytic differentiation more commonly involves the skin than other types of myeloid leukemia
  • Usually is abnormal peripheral blood count at diagnosis
  • Skin involvement is rarely initial manifestation of recurrence (Am J Clin Pathol 2008;129:130)
  • May also have accompanying vasculitis (Am J Clin Pathol 1997;107:637)
  • Aggressive behavior and short survival (J Am Acad Dermatol 1999;40:966)
Case reports
Treatment
  • Systemic chemotherapy directed at eradicating the leukemic clone
Clinical images

Contributed by Mark R. Wick, M.D.

Chronic lymphocytic type

Myeloid type

Gross description
  • Multiple nodules / papules
Microscopic (histologic) description
  • In CLL, may be perivascular, periadnexal, nodular or band-like dermal infiltrate
  • Infiltrate in leukemic patients is often NOT neoplastic, but reactive
  • AML: dermis and superficial subcutaneous fat are diffusely infiltrated by a monotonous population of large cells with a high nuclear to cytoplasmic ratio, round to slightly irregular nuclear contours, finely dispersed chromatin and prominent nucleoli
Microscopic (histologic) images

Case #140

AML


CD45

CD43

CD117

CD68



Contributed by Mark R. Wick, M.D.

Myeloid type, granulocytic sarcoma


Myeloid type

CD43

Myeloperoxidase

Leder

Positive stains
  • Myeloblasts: chloroacetate esterase (Leder stain), myeloperoxidase
Additional references
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