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May 14, 2006 - (Krukenberg's tumor). A cisplatin-based regimen was given but no objective response was observed. The pa- tient died six months after initial ...
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World J Gastroenterol 2006 May 14; 12(18): 2958-2961 World Journal of Gastroenterology ISSN 1007-9327 © 2006 The WJG Press. All rights reserved.

CASE REPORT

Gastric signet-ring adenocarcinoma presenting with breast metastasis Anastasios L Boutis, Charalambos Andreadis, Frideriki Patakiouta, Despina Mouratidou Anastasios L Boutis, Charalambos Andreadis, Despina rd Mouratidou, 3 Department of Clinical Oncology, Theagenion Cancer Hospital, Thessaloniki, Greece Frideriki Patakiouta, Division of Pathology, Theagenion Cancer Hospital, Thessaloniki, Greece rd Correspondence to: Dr. Anastasios Boutis, 3 Department of Clinical Oncology, Theagenion Cancer Hospital, 54007, Thessaloniki, Greece. [email protected] Telephone: +30-231-898720 Fax: +30-231-256909 Received: 2205-11-17 Accepted: 2006-01-18

cases of secondary breast tumors have been reported so far in the English speaking literature[3]. The most common primary malignancies metastasizing to the breast are malignant melanoma, lung cancer, carcinoid tumors, ovarian cancer, renal cancer, gastrointestinal carcinomas and a variety of other primaries[2-4]. Herein, a case of a woman with gastric signet-ring adenocarcinoma presenting with breast metastasis is described.

CASE REPORT Abstract Breast metastases from gastric cancer are extremely rare. A case report of a 37-year-old female with breast inflammatory invasion and ascites is described. Breast biopsy revealed carcinomatous invasion of the lymphatics from adenocarcinoma cells with signet-ring features. Estrogen (ER) and progesterone receptors (PR) and c-erb-B2 were negative. Upper gastrointestinal endoscopy revealed a prepyloric ulcerative mass. Histopathologic examination of the lesion showed infiltration from a highgrade adenocarcinoma, identical with that of the breast. Immunostaining was positive for cytokeratins CK-7 and CK-20 and CEA and negative for ER and PR. Ascitic fluid cytology was positive for adenocarcinoma cells. Mammography was not diagnostic. Abdominal CT scanning revealed large ovarian masses suggestive of metastases (Krukenberg’s tumor). A cisplatin-based regimen was given but no objective response was observed. The patient died six months after initial diagnosis. A review of the literature is performed. © 2006 The WJG Press. All rights reserved.

Key words: Gastric adenocarcinoma; Signet-ring; Breast metastasis; Ovarian metastasis Boutis AL, Andreadis C, Patakiouta F, Mouratidou D. Gastric signet-ring adenocarcinoma presenting with breast metastasis. World J Gastroenterol 2006; 12(18): 2958-2961

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INTRODUCTION Breast metastases from extra-mammary neoplasms are extremely rare. The incidence ranges between 1%-2% in clinical and 1.7%-6.6% in autopsy series[1-2]. Less than 500 www.wjgnet.com

A 37-year-old female presented to our department in September 2003 with abdominal distention and painful and edematous left breast. Her medical history was unremarkable except for three attempts of in vitro fertilization during the last two years. Physical examination revealed ascites and marked left breast inflammation. Neither discrete tumor nodules in the breast nor any enlarged axillary nor supraclavicular lymph nodes were palpable. Mammography showed diffuse increased density and skin thickening, without evidence of mass or microcalcifications. Abdominal ultrasonography established the presence of bilateral cystic adnexal masses with thickened walls and ascitic fluid. Abdominal CT confirmed the presence of large ovarian masses suggestive of metastases (Krukenberg’s tumor); however, there was no evidence of lung, liver or bone metastases. Serum tumor markers CEA, CA 15-3 and CA 19-9 were within normal limits and CA 125 was slightly elevated (63.6 U/L). Ascitic fluid cytology was found positive for adenocarcinoma. Core needle biopsy of the left breast revealed diffuse infiltration of the lymphatics in form of tumor emboli from neoplastic cells with signetring features (Figure 1). Immunohistochemical studies for estrogen receptor (ER) and progesterone receptor (PR) as well as for c-erb-B2 were negative. Upper gastrointestinal endoscopy demonstrated a large prepyloric ulcerative mass. Biopsy of the lesion revealed infiltration from a diffusetype high-grade gastric adenocarcinoma with signet-ring features (Figures 2 and 3). Malignant cells were positive for cytokeratins 7 and 20 (CK7, CK20) and CEA, and negative for ER and PR. Subsequent study of the breast biopsy revealed similar findings (positive staining for CK7, CK20 and CEA). The patient was treated with cisplatin-based chemotherapy; but she showed no objective response and died six months after the initial diagnosis.

DISCUSSION Metastatic breast involvement from extra-mammary

Boutis AL et al. Breast metastasis from gastric signet-ring carcinoma

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Figure 1 Breast biopsy showing breast lymphatic invasion from neoplastic cells with signet-ring features (Hematoxylin & eosin, 200 ×, 400 ×).

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Figure 2 (A & B) Upper GI endoscopy of the patient, showing a large ulcerative lesion in the prepyloric region.

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primaries is unusual. Most cases are related with extensive disease burden and carry an unfavorable prognosis [5]. Breast invasion is the initial manifestation of the disease in 25%-40% of the cases[2]. Mammographically, metastatic tumors in the breast present as well-circumscribed nodules without microcalcifications, mimicking benign breast lesions[5]. Calcifications may be seen in metastatic deposits from ovarian carcinoma with psammoma bodies[6]. The most common localization of metastatic lesions is the upper-outer quadrant of the left breast. Breast involvement is bilateral in 25% of the cases, and there is concomitant axillary lymph node enlargement in up to 15% [5]. The occurrence of multiple tumor nodules is unusual and diffuse involvement mimicking inflammatory breast carcinoma is rare[7,8]. The latter clinical manifestation, due to lymphatic invasion, is rapidly progressive, and may produce clinical signs of breast involvement before a firm metastatic nodule is formed, which is even more common in hematological malignancies (leukemias, lymphomas). Breast metastases from gastric cancer are extremely rare. To date, only 25 cases have been reported in the English speaking literature and are mentioned in Table 1. Signetring features have been reported in 13 cases. From reports with available data, it seems that breast involvement usually follows the detection of gastric carcinoma. Breast metastasis as initial manifestation of a primary gastric tumor, as in our case, has been reported in 10 cases. In half of these cases breast involvement had the clinical appearance of inflammatory breast cancer. Breast metastases from gastric carcinoma differ

Figure 3 Gastric biopsy showing infiltration from neoplastic cells with signet-ring features (Hematoxylin & eosin, 100 ×). Right picture shows immunohistochemical stain for CK-7 (Hematoxylin & eosin, 100 ×).

from primary breast cancer in their histopathologic characteristics. Immunostaining is usually negative for estrogen and progesterone receptors [9,10] as well as for c-erbB-2 [3]. GCDFP-15 (gross cystic disease fluid protein-15) is also absent[10]. There is no evidence of an in situ component[3,5] and a lack of desmoplastic response[3]. On the contrary, lymphatic tumor emboli and epithelial markers like CK7, CK20 and CEA are usually present[3,5]. In our case, the presence of signet-ring cells within breast lymphatics, the absence of mass or microcalcifications in the mammography, the lack of an in situ component and hormone receptor negativity strongly suggested an extra-mammary primary. It is of noted interest that Steinbrecher and Silverberg in 1976[11] first described primary signet-ring carcinoma of the breast, as a subtype of lobular carcinoma, with aggressive biological behavior and an increased tendency to metastasize in the abdomen and in the gastrointestinal tract compared to other histological subtypes[9,10]. Signet-ring carcinoma of the breast metastatic to the stomach has also been reported[12,13]. The presence of cystic ovarian masses suggested metastatic ovarian involvement (Krukenberg’s tumor). Unfortunately, the patient’s unfavorable clinical condition did not allow histological confir mation. Metastatic involvement of the breast and the ovaries is extremely rare and has been reported in only 5 cases so far. Selective invasion of hormone-dependent organs seems quite intriguing, especially in pre-menopausal women. Increased blood supply of the breast has been proposed as the www.wjgnet.com

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Table 1 Patients’ characteristics in reported cases of breast metastasis from gastric cancer n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Reference

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Reitmann 1908 Kreibich 1909 Mourier 1910 Stahr 1922 Dawson 1936 Abrams 1949 Sandison 1959 Hajdu 1972 Silverman 1974 Toombs 1977 Satake 1980 Togo 1980 Nielsen 1981 Champault 1982 Kasuga 1986 Alexander 1989 Hamby 1991 Cavazzini 1993 Domanski 1996 de la Cruz Mera 1998 Briest 1999 Kwak 2000 Kwak 2000 Madan 2002 Di Cosimo 2003 Boutis 2005

Age 33 65 31 46 25 56 39 70 59 65 48 28 31 48 61 46 41 23 39 39 37

Histology Scirhous Scirhous Mucinous Anaplastic Mucinous Signet-ring cell Adenocarcinoma Mucin-producing Signet-ring cell Signet-ring cell Mucinous Adenocarcinoma Signet-ring cell Mucinous differentiation Signet-ring cell Signet-ring cell Signet-ring cell Signet-ring cell Signet-ring cell Signet-ring cell Signet-ring cell Signet-ring cell Signet-ring cell Signet-ring cell

Presentation after initial diagnosis (mo) Concomitant4 Concomitant Concomitant Concomitant Concomitant 31 Concomitant Concomitant Concomitant 13 2 Concomitant Concomitant 3 1 Concomitant

Clinical presentation Nodule Nodule Nodule Nodule Nodules Nodules Nodule Inflammatory Nodule Nodule Inflammatory Inflammatory Inflammatory Nodule Nodules Inflammatory

Localization 3

R+L R L R+L R+L L L L L L L R+L R+L R L upper-outer L upper-outer R+L L R R R+L L

Other metastatic sites Skin Liver, pancreas Ovaries Lymph nodes Lymph nodes, ovaries L supraclavicular Pleura Bilateral axillary nodes Ovaries5 Axillary nodes Ovaries, peritoneum Ovaries, peritoneum, skin Ovaries5, ascites

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Clinical information is mentioned in the table only if available by the authors. References Reitmann 1908, Kreibich 1909, Mourier 1910, Stahr 1922, Dawson 1936, Satake 1980, Togo 1980 are included in Hamby 1991[2]. 3 R: right; L: left. 4 Breast metastasis was the initial manifestation of disease. 5 No histological confirmation. 2

mechanism for the increased incidence of breast metastasis in pre-menopausal women[14-15]. On the other hand, gastric cancer seems to have a more aggressive biologic behavior in younger age groups, where hor monal factors are implicated[16]. The appearance of breast metastases in men with gynecomastia supports the latter hypothesis[17]. In our patient, hormonal therapy for the induction of ovulation may have influenced the natural history of the disease[1]. However, no conclusions about the pathogenesis of the phenomenon can be drawn. Metastatic disease of the breast is rare, and usually has atypical clinical and mammographic presentation. In cases of breast inflammation or lumps, biopsy should be performed, even in the presence of an extra-mammary neoplasm. Likewise, peculiar histological features from malignant breast lesions should be co-estimated with other clinical parameters toward the diagnosis of metastatic disease. Thus, avoidance of unnecessary radical surgical procedures and an adequate treatment is more probable to be given in these patients.

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L- Editor Kumar M E- Editor Bi L

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