GATA3 and MYB Expression in Cutaneous Adnexal Neoplasms.
Knowledge of staining pattern of certain immunostains might be useful in the classification of cutaneous adnexal tumors that can have clinical importance. We studied GATA3 and MYB expression in archival materials of 220 adnexal tumors comprised of sebaceous carcinomas, follicular tumors, apocrine carcinoma, predominantly apocrine tumors, predominantly eccrine tumors, and others including adenoid cystic carcinomas. Nuclear GATA3 expression was seen in 70% (153/220) of cases, including sebaceous carcinoma (93%), apocrine carcinoma (93%), follicular neoplasms (100%), and predominantly apocrine neoplasms (69%), yet only 38% of predominantly eccrine neoplasms. Nuclear MYB expression was seen in 43% (81/188) of cases, including adenoid cystic carcinoma (90%), predominantly apocrine tumors (66%), follicular neoplasms (49%), apocrine carcinomas (14%), predominantly eccrine tumors (11%), and sebaceous carcinomas (4%). GATA3 and MYB expression were noted in 43% (9/21) and 24% (5/21) of cutaneous metastases, respectively. Expression of both GATA3 and MYB was noted in 33% (60/184) of primary adnexal tumors versus 19% (4/21) of cutaneous metastases. GATA3 preferentially labels tumors with follicular, sebaceous, and apocrine differentiation. MYB is potentially a helpful stain in the distinction of desmoplastic trichoepithelioma versus basal cell carcinoma. The coexpression of GATA3 and MYB might be helpful in the distinction of primary cutaneous adnexal carcinoma versus metastatic breast, salivary gland, or urothelial carcinoma.
*Departments of Pathology, Porto Medical School and Sao Joao Hospital, Porto, Portugal; †Departments of Pathology, William Beaumont School of Medicine, Royal Oak, MI; ‡Departments of Pathology, Duke University Medical Center, Durham, NC; and §Departments of Pathology, Harvard Medical School and Massachusetts General Hospital, Boston, MA.
Joana
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Pardal
Uma
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Sundram
M Angelica
MA
Selim
Mai P
MP
Hoang
D014408:Biomarkers, Tumor / Q000032:analysis*; D050990:GATA3 Transcription Factor / Q000032:analysis / Q000096:biosynthesis*; D006801:Humans; D007150:Immunohistochemistry; D018294:Neoplasms, Adnexal and Skin Appendage / Q000473:pathology*; D020598:Proto-Oncogene Proteins c-myb / Q000032:analysis / Q000096:biosynthesis*; D012878:Skin Neoplasms / Q000473:pathology*
D014408:Biomarkers, Tumor; D050990:GATA3 Transcription Factor; C494749:GATA3 protein, human; D020598:Proto-Oncogene Proteins c-myb