title: Serous papillary adenocarcinoma of the female genital organs and invasive micropapillary carcinoma of the breast. Are WT1, CA125, and GCDFP-15 useful in differential diagnosis?
abstract: Serous papillary adenocarcinoma of the female genital organs and invasive micropapillary carcinoma of the breast have close histologic similarities. Thus, when these cancers occur synchronously or metachronously in the same patient, it is difficult to determine the primary site. We examined 23 serous papillary adenocarcinomas (16 ovarian, 5 endometrial, and 2 peritoneal) and 37 invasive micropapillary carcinomas of the breast (12 pure and 25 mixed types) on immunohistochemical expression of Wilm's tumor antigen-1 (WT1), CA125, and gross cystic disease fluid protein-15 (GCDFP-15), which have been reported to be useful in the differential diagnosis of primary ovarian carcinomas versus metastatic breast cancer to the ovary. The positive rates of WT1, CA125, and GCDFP-15 in serous papillary adenocarcinomas were 78%, 78%, and 0%, respectively, and the corresponding rates in invasive micropapillary carcinomas were 3%, 40%, and 38%. The CA125-positive rate of invasive micropapillary carcinoma was higher than the rate reported for other types of breast carcinomas. We consider CA125 to be not always useful in the differential diagnosis of serous papillary adenocarcinoma and invasive micropapillary carcinoma. Although the positive rate of WT1 was significantly higher in serous papillary adenocarcinoma than in invasive micropapillary carcinoma, WT1 expression in endometrial serous papillary adenocarcinoma was infrequent (20%). WT1 and GCDFP-15 could be useful markers for the differential diagnosis of ovarian and peritoneal serous papillary adenocarcinoma versus breast invasive micropapillary adenocarcinoma. However, the availability of GCDFP-15 is limited because of the low positive rate of GCDFP-15 in invasive micropapillary carcinomas.
authors.affiliation: Department of Pathology and Clinical Laboratories, Nagoya Medical Center, Nagoya, Aichi 460-0001, Japan. moritani@nnh.hosp.go.jp
authors.forename: Suzuko
authors.initials: S
authors.lastname: Moritani
authors.forename: Shu
authors.initials: S
authors.lastname: Ichihara
authors.forename: Masaki
authors.initials: M
authors.lastname: Hasegawa
authors.forename: Tokiko
authors.initials: T
authors.lastname: Endo
authors.forename: Mikinao
authors.initials: M
authors.lastname: Oiwa
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Yoshikawa
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Sato
authors.forename: Hideaki
authors.initials: H
authors.lastname: Aoyama
authors.forename: Takako
authors.initials: T
authors.lastname: Hayashi
authors.forename: Ryoji
authors.initials: R
authors.lastname: Kushima
mesh_terms: D000231:Adenocarcinoma, Papillary / Q000175:diagnosis* / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis*; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000473:pathology; D018394:CA-125 Antigen / Q000032:analysis*; D002352:Carrier Proteins / Q000032:analysis*; D003937:Diagnosis, Differential; D016889:Endometrial Neoplasms / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D005833:Genital Neoplasms, Female / Q000175:diagnosis* / Q000473:pathology; D006023:Glycoproteins / Q000032:analysis*; D006801:Humans; D026901:Membrane Transport Proteins; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000175:diagnosis* / Q000473:pathology; D025721:WT1 Proteins / Q000032:analysis*
chemical_list: D014408:Biomarkers, Tumor; D018394:CA-125 Antigen; D002352:Carrier Proteins; D006023:Glycoproteins; D026901:Membrane Transport Proteins; C488892:PIP protein, human; D025721:WT1 Proteins