Immunohistochemical analysis of human milk fat globulin expression in extramammary Paget's disease.
Primary extramammary Paget's disease is thought to be an intraepidermal carcinoma indicating apocrine secretory differentiation. In addition to expression in breast tissue, human milk fat globulin (HMFG) is expressed in the normal apocrine glands and tumours with apocrine differentiation. In this study HMFG expression in extramammary Paget's disease was analysed immunohistochemically in 18 cases of primary extramammary Paget's disease and two cases of secondary extramammary Paget's disease. The proportion and staining pattern of positive tumour cells with the anti-HMFG antibody was variable in each case. Cytoplasmic staining was observed frequently in dermal invasion and metastasis of Paget cells. The variabilities were thought to be due to modulation of the cellular localization of the cell surface component, HMFG, according to changes in cellular differentiation or malignant potency.[1]References
- Immunohistochemical analysis of human milk fat globulin expression in extramammary Paget's disease. Ohnishi, T., Watanabe, S. Clin. Exp. Dermatol. (2001) [Pubmed]
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