Surgical Treatment of Locoregional Recurrence in Breast Cancer / 한국유방암학회지

PURPOSE: The locoregional recurrence (LRR) in breast cancer, without distant metastasis has traditionally been regarded as a predictor of subsequent distant metastasis. This study was designed to attain the survival rate, disease progress in patients with a LRR only and to approve a locoregional treatment able to increase the survival in specific locoregional recurrent breast cancer. METHODS: The records of 223 patients with LRR, after initial treatment at the Asan Medical Center, between 1989 and 2003, were retrospectively reviewed. The patients were classified into the LRR only and simultaneous distant metastasis groups with the LRR group subdivided into the operable and inoperable groups. The data were analyzed using SPSS 11.0. RESULTS: There were 152 and 71 patients in the LRR only and simultaneous distant metastasis groups respectively: 105 patients in the LRR only group were operable cases. The 5-year survival rate of LRR was 42.5%, but this was 50.1% in the LRR only group. The 5-year survival rates following a recurrence in the operable and inoperable groups were 66.2% and 21.1%. On multivariate analysis, age at the primary surgery, tumor size, hormone receptor status and DFI were independent prognostic factors for survival. The operable group indicated less tumor size at the primary surgery, less lymph node metastasis and more chest wall or axillary lymph node recurrences, compared to the inoperable group. CONCLUSION: In some of the LRR only cases, the survival rate was relatively good, especially in the operable group. Age at the primary surgery, tumor size, hormone receptor status and DFI were independent prognostic factors for survival. Surgical treatment could be resulted in good responses to the LRR patients with early stage or chest wall or axillary recurrences.

Clinicopathological Characteristics of Invasive Lobular Carcinoma in the Breast: Multifocality and Difficulty in Preoperative Diagnosis

PURPOSE: Infiltrating lobular carcinoma (ILC) represents approximately 10% of all breast cancers. Its detection and staging for appropriate surgical planning may be difficult on account of its unique growth pattern, including a linear file arrangement of the tumor cells and a planar growth pattern and the resulting low density of the lesions. The purpose of this study was to evaluate the clinicopathological features of an ILC of the breast including multifocality, the preoperative accuracy of the pathological diagnostic tools, and its impact on the surgical procedure. METHODS: Between 1997 and 2003 at the Asan Medical Center, a group of 63 patients with a pathologically proven invasive lobular carcinoma who had undergone surgery were included. They were all in stage I~III, and their medical records, mammographic and sonographic results, and pathologic findings were reviewed retrospectively. RESULTS: Of the 63 patients with a mean age of 48 years (range 35 to 70), multifocal lesions were identified in 27.0% by a pathological examination. For a preoperative evaluation of a multifocal lesion, the sensitivity and positive prediction value were 21.4% and 50% by mammography, and 92.9% and 52.0% by ultrasonography, respectively. Only 27.0% of all patients were confirmed as having an ILC preoperatively; surgical excision or incision biopsies 75%, core-needle biopsy 36.4%, frozen biopsy 22.7%, FNA 5.9%. Conservative surgery was performed in only 14.3% and a mastectomy was performed on 85.5%. The mean tumor size was 3.0 cm, and according to the TNM stage, stage I was found in 22.2%, stage II in 58.7%, stage III in 19.1%. ER-positive was found in 83.9% and PR-positive was found in 74.2%. Seven out of 11 patients, who underwent the planed conserving surgery, had a positive resection margin, 1 case had re- excision, 2 cases underwent mastectomies, and 4 cases underwent radiation therapy without additional surgery. CONCLUSION: Since invasive lobular carcinomas have more often multifocal lesions and a preoperative accurate evaluation may be difficult pathologically or radiologically, a careful evaluation of the accurate tumor extent as well as the multifocal lesion is needed particularly for patients with an ILC considering conserving surgery.

Skin-sparing Mastectomy with Immediate Breast Reconstruction for the Treatment of Advanced Breast Cancer / 한국유방암학회지

PURPOSE: This study was performed to show the several clinical variables before and after the surgery that need to be considered for patient selection and whether there is an increased possibility of recurrence after surgery and whether this possibility can be reduced when adjuvant treatment is applied. METHODS: The outcome of SSM with immediate breast reconstruction, using follow-up data of cases performed at Asan Medical Center between September, 1996 and December, 2002, were retrospectively assessed and pathologically advanced breast cancer patients (stage III) were analyzed separately. RESULTS: 191 patients had undergone SSM with immediate reconstruction during the study period. The percentage of cases stage III was 15.2% (29 cases). Among these patients, 6 (20.7%) were suspected of being in the early stages of breast cancer prior to the surgery. The mean age of the advanced breast cancer patients was 37 years. Immediate breast reconstruction consisted of a pedicled TRAM flap (n=24), a insertion of tissue expander (n=4) or direct implant (n=1). Radiotherapy was performed in 16 patients (53.3%) and chemotherapy was conducted without delay in all case. With a median length of follow-up of 36.1 months for 22 patients, who under went the operation until December, 2001, local recurrence was 4.5% (1/22) with successful local treatment, and distant metastasis was 13.7% (3/22). There was no difference in the disease free survival compared to that of the non-reconstruction group (P=0.093). CONCLUSION: SSM with immediate reconstruction seems safe and effective for patients with advanced breast cancer. However an accurate preoperative assessment of the extent of the disease and discussion for the planning of treatment between surgeon and patient is required.

Prevalence of BRCA1 and BRCA2 Mutations in Korean Breast Cancer Patients

The incidence of breast cancer in Korea has been increasing in recent years, such that it is now the most common female cancer. Breast cancer in Korea is characterized by an earlier age of onset than in Western countries, suggesting that it would be related with genetic background. We assayed germline mutations in the BRCA genes to evaluate their genetic pathology in Korean breast cancer patients. The study subjects consisted of 173 patients at clinically higher risk and 109 unselected patients. Germline mutations in the entire coding sequences of the BRCA1 and BRCA2 genes were analyzed by Conformation-Sensitive Gel Electrophoresis (CSGE), and any aberrantly-sized band was sequenced. BRCA mutations were present in 12.7% of the high risk patients, compared with 2.8% of the unselected patients. Among high risk patients, mutations were most prevalent in patients with a family history of breast or first-degree ovarian cancer (22.1%), followed by those with male breast cancer (20%), bilateral breast cancer (20%), multiple organ cancer including breast (13%) and younger breast cancer patients (aged<35 yr) (8.1%). Moreover, BRCA mutations were detected in 34.8% of patients having two highrisk factors. These findings suggest that BRCA gene mutation analysis should be performed on Korean patients with high-risk factors for breast cancer.

Increase of Fat Necrosis after Radiation Therapy Following Mastectomy and Immediate TRAM Flap Reconstruction in High-risk Breast Cancer Patients / 한국유방암학회지

PURPOSE: This study evaluated the benefit of radiation therapy in high-risk breast cancer patients who have received immediate transverse rectus abdominis myocutaneous (TRAM) flap reconstruction. The evaluation involved examining the effect of radiation therapy on postmastectomy flap fat necrosis and tumor recurrence. METHODS: A retrospective review was performed on 102 patients who underwent mastectomy and immediate TRAM flap reconstruction between 1996 and 2001 at the Asan Medical Center (Seoul, Korea). The mean patient age was 41 years, and the median follow-up time was 33 months. Skin-sparing mastectomy was con ducted in 82 patients (80.4%) and classical mastectomy in 20 patients (19.6%). Of the 21 high-risk patients needing postmastectomy radiation therapy, nine received it. RESULTS: Moderate or severe TRAM flap fat necrosis occurred more frequently in patients receiving radiation therapy than those not receiving radiation therapy (55.6% vs. 19.4%, P=0.026). In the group with high-risk patients, two tumor recurrences occurred (one-locoregional and one-systemic). Among the 102 patients, thirteen had recurrences, including only two high-risk patients, with almost of them being systemic recurrences except four locoregional recurrences. CONCLUSION: Our findings showed that radiation therapy increased flap fat necrosis in high-risk patients underwent immediate TRAM flap reconstruction. Such necrosis can result in poor outcomes for reconstruction. We recommend careful consideration prior to using radiation therapy on high-risk breast cancer patients after immediate TRAM flap reconstruction, where clinicians need to balance the possible positive effects on recurrence with the possible negative effects on flap tissue.

Clinicopathological Characteristics and Prognosis of Breast Cancer in Young Women Under 35 Years of Age

BACKGROUND: Generally, it has been thought that the prognosis of breast cancer in young women is worse than that in their older counterparts. This, however, remains controversial. The purpose of this study was to evaluate the clinicopathological characteristics and the prognosis of breast cancer in the young age group. METHODS: One hundred and thirty-three patients under 35 years of age (younger group) at the time of diagnosis were selected from among the of total 936 female breast-cancer patients treated at the Breast Cancer Clinic of Asan Medical Center from July 1989 to December 1996, and they were compared with the 803 patients over 35 years of age (older group). RESULTS: Inadequately diagnosed cases of breast cancer, including a dense breast on mammography, were more frequent among the younger group (p=0.0005). The median tumor size of invasive ductal carcinomas was larger (3.0 cm vs 2.4 cm). The rate of lymph-node metastasis was high (58.6% vs 46.1%). The rate of early breast cancer (stage 0 and I) was lower (25.3% vs 42.6%). The 5-year disease-free survival rate was less (56.6% vs 73.7%, p=0.037), but no differences in operative methods, 5-year overall survival rate, and disease-free survival rate based on the different stages were observed between the two groups. CONCLUSIONS: This study showed that in the younger group (under 35 years of age), the breast cancer was more advanced, the lymph-node metastasis rate was higher, and the 5-year disease-free survival rate was significantly lower, but the 5-year overall survival rate was not significantly different from that in the older group.