Abstract | CONTEXT: OBJECTIVES: DESIGN: Routinely formalin-fixed, paraffin-embedded tissues from 30 cases of GS were studied using immunohistochemistry. c-Kit (C-19) (a polyclonal antibody against carboxy terminal domain of c-Kit p145 or CD117) reactivity was compared with myeloperoxidase and lysozyme. The immunohistochemical panel also included CD34, CD68, CD43, Bcl-2, CD45RB, CD20, CD3, CD10, terminal deoxynucleotidyl transferase (TdT), and CD79a. RESULTS: The morphologic patterns included well-differentiated (5 cases), poorly differentiated (19 cases), and blastic forms (6 cases). Clinical data were obtained from 28 of 30 patients. Granulocytic sarcoma presented in lymph nodes in 10 cases, whereas in 20 cases it presented in extranodal sites. c-Kit reactivity was found in 87% (26/30) of the GS cases. There was no significant difference in c-Kit positivity between the nodal (90%, 9/10) and extranodal (85%, 17/20) neoplasms. c-Kit expression was not associated with the degree of the myeloid maturation. Two of 13 lymphoblastic lymphoma control cases and 1 of 28 of the large B-cell lymphomas were weakly immunoreactive with c-Kit. CONCLUSIONS: c-Kit reactivity can be demonstrated in a high percentage of GS cases; its presence may be useful not only in diagnosis, but also in the treatment of GS with new modalities.
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Authors | J Chen, R R Yanuck 3rd, S L Abbondanzo, W S Chu, N S Aguilera |
Journal | Archives of pathology & laboratory medicine
(Arch Pathol Lab Med)
Vol. 125
Issue 11
Pg. 1448-52
(Nov 2001)
ISSN: 0003-9985 [Print] United States |
PMID | 11698000
(Publication Type: Journal Article)
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Chemical References |
- Biomarkers, Tumor
- MAS1 protein, human
- Proto-Oncogene Mas
- Proto-Oncogene Proteins c-kit
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Topics |
- Adolescent
- Adult
- Aged
- Biomarkers, Tumor
- Breast Neoplasms
(immunology, pathology)
- Child
- Diagnosis, Differential
- Female
- Granulocytes
(immunology, pathology)
- Humans
- Immunohistochemistry
- Intestinal Neoplasms
(immunology, pathology)
- Intestine, Small
- Leukemia, Myeloid
(immunology, pathology)
- Lymph Nodes
(pathology)
- Male
- Middle Aged
- Proto-Oncogene Mas
- Proto-Oncogene Proteins c-kit
(analysis)
- Sarcoma
(immunology, pathology)
- Skin Neoplasms
(immunology, pathology)
- Testicular Neoplasms
(immunology, pathology)
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