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Skin Cancer

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Aleukemic cutaneous myeloid sarcoma.

Amir Aboutalebi¹, John B Korman, Aliyah R Sohani

¹Department of Dermatology, Harvard Medical School, Boston, MA, USA.

Journal of Cutaneous Pathology

|November 27, 2013

Summary

This summary is machine-generated.

Aleukemic cutaneous myeloid sarcoma (CMS) is a rare skin condition without blood or bone marrow involvement. Diagnosis requires careful evaluation, including molecular and cytogenetic studies, to distinguish it from other conditions and guide treatment.

Keywords:

aleukemic cutaneous myeloid sarcoma histiocytic molecular monocytic

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Area of Science:

Hematology
Dermatopathology
Oncology

Background:

Aleukemic cutaneous myeloid sarcoma (CMS) is a rare condition characterized by leukemic myeloid cell infiltration of the skin without concurrent peripheral blood or bone marrow disease.
Diagnosis can be challenging due to isolated skin findings and variable immunohistochemical staining.
Cytogenetic and molecular findings in CMS are infrequently reported, necessitating further research.

Observation:

A retrospective review identified three patients with aleukemic CMS between 2004 and 2012.
Histological examination revealed atypical mononuclear cell infiltrates in the dermis.
Immunohistochemical analysis showed variable expression of CD68, lysozyme, CD117, CD34, and myeloperoxidase.

Findings:

Genetic analysis detected 11q23 rearrangement, t(1;14), NPM1 mutations, FLT3-ITD, and novel FLT3-D835 mutations.
These molecular findings are crucial for accurate diagnosis and understanding the pathogenesis of CMS.
The study highlights the importance of comprehensive diagnostic workup for suspected aleukemic CMS.

Implications:

An isolated atypical cutaneous infiltrate may indicate aleukemic CMS, warranting investigation for extramedullary disease.
Immunohistochemistry, molecular, and cytogenetic studies are essential for differentiating aleukemic CMS from benign and malignant mimics.
These studies may also inform therapeutic strategies and prognostic assessments for patients with aleukemic CMS.