Bilateral synchronous breast carcinomas followed by a metastasis to the gallbladder: a case report
© Zagouri et al; licensee BioMed Central Ltd. 2007
Received: 15 May 2007
Accepted: 11 September 2007
Published: 11 September 2007
Breast cancer is usually associated with metastases to lungs, bones and liver. Breast carcinoma metastasizing to the gallbladder is very rare.
A 59-year-old woman presented with bilateral synchronous breast lesions. A palpable, retroareolar solid lesion of diameter equal to 5 cm was present in the right breast, and a newly developed, non-palpable lesion with microcalcifications (diameter equal to 0.7 cm) was present in the upper outer quadrant of the left breast. Modified radical mastectomy was performed on the right breast and lumpectomy after hook-wire localization was performed on the left breast, combined with lymph node dissection in both sides. The pathological examination revealed invasive lobular carcinoma grade II in the right breast and invasive ductal carcinoma grade I in the left breast. Chemotherapy, radiation therapy, trastuzumab and letrozole were appropriately administered. At her 18-month follow-up, the patient was free of symptoms; the imaging tests (chest CT, abdominal U/S, bone scan), biochemical tests, blood cell count and tumor markers were also normal. At the 20th month after surgery however, the patient developed symptoms of cholecystitis and underwent cholecystectomy. The histopathological examination revealed metastasis of the lobular carcinoma to the gallbladder.
This extremely rare case confirms on a single patient the results of large series having demonstrated the preferential metastasis of lobular breast cancer to the gallbladder. Symptoms of cholecystitis should not be neglected in such patients, as they might indicate metastasis to the gallbladder.
Breast cancer is usually associated with local and lymphatic spread and with blood-borne spread to lungs, bones and liver. The central nervous system, endocrine organs, pericardium, abdominal cavity and eye are infrequently involved. Breast carcinoma metastasizing to the gallbladder is extremely rare , and only few cases have been reported to the literature [2–10].
The present case however is of particular interest and differentiates itself from all the previously reported cases, due to the coexistence of two independent breast carcinomas.
A 59-year-old woman came to our Breast Unit due to a palpable lesion in her right breast. From the personal history, the woman had risk factors for breast cancer: positive family history for breast cancer (mother with postmenopausal breast invasive ductal carcinoma). Her BMI was equal to 24.9, and she was a housewife. The age at menarche was 12 years old, and the age at menopause was 48 years. Her reproductive history consisted of two full-term pregnancies and no spontaneous or induced abortions; the total duration of lactation was nine months. The patient reported no intake of estrogen, and her family history was negative for ovarian and prostate cancer.
Clinical examination and mammography of the right breast revealed a palpable, retroareolar lesion of diameter equal to 5 cm. In ultrasound, the consistency of the lesion was solid and multilobular. Additionally, mammography of the left breast demonstrated a newly developed, non-palpable lesion, consisting of clustered microcalcifications of diameter equal to 0.7 cm in the upper outer quadrant. Axillary lymph nodes of small size were detected on the mammogram in both sides.
FNA confirmed the malignancy on the right breast and open surgery followed. Modified radical mastectomy was performed on the right breast and lumpectomy after hook-wire localization was performed on the left breast, combined with lymph node dissection in both sides.
in the right breast: invasive lobular carcinoma grade II, with oestrogen receptors strongly positive (3+), progesterone receptors moderately positive (2+), c-erbB-2 negative (-), and 21 out of 21 infiltrated lymph nodes.
ii) in the left breast: invasive ductal carcinoma grade I, with oestrogen receptors strongly positive (3+), progesterone receptors strongly positive (3+), c-erbB-2 (2+), and 4 out of 16 infiltrated lymph nodes.
The woman did not carry BRCA1 or BRCA2 mutations.
Chemotherapy (epirubicin (×3), CMF (×3), paclitaxel weekly) was administered; rradiation therapy followed. Subsequently, the patient took trastuzumab and then letrozole (which she is still receiving). She came regularly for the follow-up every 3 months in the first year, and at her 18-month follow-up, she was free of symptoms. The chest CT, the abdominal (upper and lower) U/S, the bone scan, the blood cell count, the biochemical tests (SGOT, SGPT, gamma-GT, ALP, potassium, sodium, ferrum, ferritin, LDH, CPK, creatinine, urea, uric acid, erythrocyte sedimentation rate) and tumor markers (CEA, CA-15-5, CA 19-9, MCA, TPA) were within normal range.
After the establishment of the pathological diagnosis, and for the exclusion of coexisting peritoneal metastases, MRI and laparoscopy followed, which did not reveal any intra-abdominal disseminative lesions.
At the moment (32 months after the diagnosis of breast cancer, and 12 months after metastasis to the gallbladder), the patient has showed no sign of recurrence. Her clinical, laboratory, and imaging check-up is normal.
To our knowledge, this is the first case of two synchronous breast carcinomas (lobular invasive and ductal invasive carcinoma), one of which metastasized to the gallbladder.
Interestingly enough, the histological type that was identified in the gallbladder was lobular carcinoma. At first sight, the fact that the lobular carcinoma was accompanied by metastatic spread seems rational, given that its size was larger than that of the ductal carcinoma. However, the site of metastasis is of special importance, and the clinician may have predicted that the lobular carcinoma is the underlying cause. Indeed, lobular carcinomas show a preference to gynecologic organs, peritoneum-retroperitoneum and gastrointestinal system, including the gallbladder [11, 12].
As far as the clinical presentation of metastasis to the gallbladder is concerned, symptoms of acute/chronic cholecystitis or abdominal pain prevail [2–10]. Similarly to the reported cases, symptoms of cholecystitis characterized the present case. With respect to the underlying mechanism, molecular events, such as alterations of E-cadherin expression, may be implicated in the facilitation of this rare, hematogenous metastasis . Importantly, metastasis to the gallbladder has been associated with poor prognosis, while widespread metastases are frequently present at the time of diagnosis [2–10].
Of notice, there is a possibility that the clinician does not evaluate comparatively the two entities (breast cancer and gallstone disease), believing that they may share common causative factors and thus may innocently coexist; however, epidemiological studies have shown that the two diseases do not share common etiologic factors [13, 14]. Taken together, the above indicate that symptoms of cholecystitis after the diagnosis and treatment of a putatively metastatic lobular breast carcinoma should not be neglected, as they might point to metastatic spread.
The present case is extremely rare. Between the two synchronous breast carcinomas (lobular invasive and ductal invasive carcinoma), the lobular one metastasized to the gallbladder. This clinical observation is in line with larger series having demonstrated the preferential metastasis of lobular cancer to the gallbladder. Symptoms of cholecystitis in patient with a diagnosis of lobular carcinoma may indicate metastasis to the gallbladder.
Written consent was obtained form the patient for publication of her case report.
The authors would like to thank Constantine Fotiadis, Associate Professor of Surgery, University of Athens, Greece, for his valuable comments regarding the content of the manuscript.
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