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Factors Associated with Re-excision after Breast-Conserving Surgery for Early-Stage Breast Cancer
Woohyun Jung,Eunyoung Kang,김선미,Dongwon Kim,Yoonsun Hwang,Young Sun Kim,Cha Kyong Yom,Sung Won Kim 한국유방암학회 2012 Journal of breast cancer Vol.15 No.4
Purpose: Re-excisions after breast-conserving surgery (BCS) for breast cancer cause delays in the adjuvant treatment, increased morbidity, and leads to poor aesthetic results. Thus, efforts to reduce the re-excision rate are essential. This study aimed to conclusively determine the re-excision rate and the factors associated with re-excision after BCS. Methods: We retrospectively reviewed the medical records and pathological reports of 711 cases that underwent BCS for early-stage breast cancer. Univariate and multivariate analyses were performed. Results: Of the 711 cases of BCS, 71 (10.0%) required re-excision. Patients in the re-excision group were younger than those in the no re-excision group. Non-palpable lesions, the presence of non-mass-like enhancement at magnetic resonance imaging, multifocality, the presence of a ductal carcinoma in situ (DCIS) component, and an infiltrative tumor border were also significantly associated with re-excision. Multivariate analysis indicated that younger age, non-palpable lesions, multifocal lesions, and the presence of a DCIS component were factors which were independently associated with re-excision. Tumors located in the lower inner quadrant had a relatively high involved resection margin rate as well as a narrow resection margin width, especially at the superior and medial margins. Lateral margins showed a tendency toward a wider resection margin width. Conclusion: At our institution, the rate of re-excision was low despite the lack of an intraoperative frozen section. Patients with non-palpable or multifocal tumors, a DCIS component, or those who were younger than 50 years were more likely to require re-excision after BCS. These factors should be considered when planning surgical management of early-stage breast cancer. Positive resection margin rates and margin widths differed on a directional basis based on tumor location, and these differences were considerable.
Peperite in the Tertiary Yangnam Basin, Korea : 1. Peperite at Maegog 1. 매곡의 페페라이트
Yoon, Sun,Hwang, Jin Yeon,Jung, Cha Yeon 부산대학교 기초과학연구소 1990 부산대학교 기초과학연구소 연구논문집 Vol.10 No.-
매곡의 페페라이트는 마이오世 前期의 典洞層의 역암층에서 산출되는데 쇄설성 역암과 현무암질 물질의 혼합체이다. 현무암질 물질은 잔자갈(Pebble)내지 표력(boulder)크기의 입자들과 유리질 물질로 역암 중에 들어 있다. 현무암질 입자들은 角形-非顯晶質과 圓形-多孔質의 두 종류로 분류되는데 前者는 粗面岩狀 組織을 갖고 있으며 氣孔이 거의 없는데 비하여, 後者는 斑狀組織을 갖고 매우 多孔質이며 變形되어져 있다. 페페라이트의 基質은 薇多孔質 조직을 갖고 있으며, 쇄설성 석영 및 장석,암편,사장석 마이크로라이트와 현무암질 유리로 구성되어져 있다. 페페라이트는 역암층과 관입 접촉관계를 보여준다. 본 페페라이트는 고체상 암괴와 유체상 암괴를 함유하고 있는 현무암질 기체상 유체가 관입 혼합되어 형성된 것으로 해석되는데, 角形-非顯晶質 입자는 고체상 암괴이며, 圓形-多孔質입자는 유체상 암괴가 고결되어 형성된 것이다. 고체상 암괴와 유체상 암괴를 갖는 기체상 현무암질 물질은 함수미소결 퇴적층에서 현무암질 관입체의 流體化作用(fluidization)에 의하여 생성되어 혼합되어지게 된 것으로 추리된다. 고체상 암괴는 간입체의 고결된 외곽부의 파편이고 유체상 암괴는 貫入體 내부에 아직 유체 상태로 있던 부분의 파편이다. 관입체의 冷却史는 冷却期와 爆發的 流體化 作用 구분되는데, 페페라이트의 형성은 후자에서 일어났다. The peperite Maegog is found in the conglomerate bed of the Early Miocene Jeondong Formation,and a mixture of epiclastic conglomerate and basltic material. The basaltic material is enclosed as pebble-to block-sized clasts and glassy materials in the conglomerate. The basalt clasts are divided into two kinds in shape and texture,that is, angular-aphanitic clasts and rounded-vesicular clasts. The former is trachytic and rarely vesicular in texture, while the latter is porphyritic and highly vesicular in texture and plastically deformed in shape. The matrix is micro-vesicular with numerous gas cavities,and consists of detrital quarzt and feldspar, rock fragments,plagioclase microlites and basaltic glass. The peperite has an intrusive contact to its adjacent conglomerate enclosing the peperite. It is suggested that the peperite at Maegog resulted from the intrusion and mixing of the basaltic material which was a gaseous fluid bearing solid blocks and fluid drops. The angular-aphnitic clasts are the solid blocks and the rounded-vesicular clasts were formed by the solidification of the fluid drops. The gaseous basaltic material bearing solid blocks and fluid drops. The gaseous basaltic material bearing solid blocks and fluid drops are presumed to have been formed and mixed with the conglomerate by the fluidization of a basalt intrusion in wet, unconsolidated sediments. The solid blocks are the fragments of the solidified outer margin of the intrusion, and the fluid drops are the fragments of the fluid inner part of the intrusion. The cooling history of the intrusion is divied into two stages, theat is, cooling stage and explosive fluidization stage. The formation of the peperite occurred in the latter stage.