Premium
Mammary and extramammary Paget's disease: an immunohistochemical study of 83 cases
Author(s) -
Liegl B,
Leibl S,
GoggKamerer M,
Tessaro B,
Horn LC,
Moinfar F
Publication year - 2007
Publication title -
histopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.626
H-Index - 124
eISSN - 1365-2559
pISSN - 0309-0167
DOI - 10.1111/j.1365-2559.2007.02633.x
Subject(s) - immunohistochemistry , extramammary paget's disease , medicine , pathology , cytokeratin , antibody , paget disease , muc1 , disease , immunology
Aim: Mammary Paget's disease (MPD) and extramammary Paget's disease (EMPD) are rare neoplasms. The aim of this study was, by the use of immunohistochemistry, to derive further information about the cell(s) of origin, find a diagnostically useful immunohistochemical panel and investigate candidates for possible targeted therapy. Material and results: Sixty MPD and 23 EMPD cases were studied using antibodies to cytokeratin (CK) 34βE12, CK8/18, CK7, CK5/6, CK20, gross cyctic disease fluid protein (GCDFP)‐15, MUC1‐8, epidermal growth factor receptor (EGFR) (HER1), HER3 and HER4. In all MPD cases CK7 and MUC1 were positive. CK8/18 was positive in 59/60 cases. GCDFP‐15, MUC2, MUC3, MUC4, MUC7, MUC8 were positive in 29/60, 3/60, 35/47, 4/40, 3/43 and 2/45 cases, respectively. In all EMPD cases CK8/18 and CK7 were positive. MUC1, GCDFP‐15, MUC5AC, MUC3, MUC8 and CK20 were positive in 22/23, 19/23, 8/19, 3/19, 1/19 and 3/23 cases, respectively. With the remaining antibodies no immunoreactivity was observed. Conclusion: MUC1 and low‐molecular‐weight CKs in conjunction with immunonegativity for high‐molecular‐weight CKs are the most diagnostically useful markers. MPD is caused by the epidermotropic spread of underlying tumour cells, whereas EMPD probably arises from intraepithelial cells of sweat gland origin. Targeted therapy with antibodies against EGFR (HER1), HER3 or HER4 is unlikely to prove of clinical value.