Value of imaging study in predicting pelvic lymph node metastases of uterine cervical cancer.

PURPOSE: To evaluate the diagnostic accuracy of computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography/computed tomography (PET/CT) in predicting pelvic lymph node (LN) metastases in patients with cervical cancer. MATERIALS AND METHODS: From January 2009 to March 2015, 114 patients with FIGO stage IA1-IIB uterine cervical cancer who underwent hysterectomy with pelvic lymphadenectomy and took CT, MRI, and PET/CT before surgery were enrolled in this study. The criteria for LN metastases were a LN diameter ≥1.0 cm and/or the presence of central necrosis on CT, a LN diameter ≥1.0 cm on MRI, and a focally increased FDG uptake on PET/CT. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy for pelvic LN metastases were estimated. RESULTS: The sensitivity, specificity, PPV, NPV, and accuracy for detection of pelvic LN metastases were 51.4%, 85.9%, 41.3%, 90.1%, and 80.3% for CT; 24.3%, 96.3%, 56.3%, 86.8%, and 84.6% for MRI; and 48.6%, 89.5%, 47.4%, 90.0%, and 82.9% for PET/CT, respectively. The sensitivity of PET/CT and CT was higher than that of MRI (p=0.004 and p= 0.013, respectively). The specificity of MRI was higher than those of PET/CT and CT (p=0.002 and p=0.001, respectively). The difference of specificity between PET/CT and CT was not statistically significant (p=0.167). CONCLUSION: These results indicate that preoperative CT, MRI, and PET/CT showed low to moderate sensitivity and PPV, and moderate to high specificity, NPV, and accuracy. More efforts are necessary to improve sensitivity of imaging modalities in order to predict pelvic LN metastases.

Treatment outcomes after adjuvant radiotherapy following surgery for patients with stage I endometrial cancer.

PURPOSE: The purpose of this study is to evaluate the treatment outcomes of adjuvant radiotherapy using vaginal brachytherapy (VB) with a lower dose per fraction and/or external beam radiotherapy (EBRT) following surgery for patients with stage I endometrial carcinoma. MATERIALS AND METHODS: The subjects were 43 patients with the International Federation of Gynecology and Obstetrics (FIGO) stage I endometrial cancer who underwent adjuvant radiotherapy following surgery between March 2000 and April 2014. Of these, 25 received postoperative VB alone, while 18 received postoperative EBRT to the whole pelvis; 3 of these were treated with EBRT plus VB. The median EBRT dose was 50.0 Gy (45.0-50.4 Gy) and the VB dose was 24 Gy in 6 fractions. Tumor dose was prescribed at a depth of 5 mm from the cylinder surface and delivered twice per week. RESULTS: The median follow-up period for all patients was 57 months (range, 9 to 188 months). Five-year disease-free survival (DFS) and overall survival (OS) for all patients were 92.5% and 95.3%, respectively. Adjuvant radiotherapy was performed according to risk factors and stage IB, grade 3 and lymphovascular invasion were observed more frequently in the EBRT group. Five-year DFS for EBRT and VB alone were 88.1% and 96.0%, respectively (p = 0.42), and 5-year OS for EBRT and VB alone were 94.4% and 96%, respectively (p = 0.38). There was no locoregional recurrence in any patient. Two patients who received EBRT and 1 patient who received VB alone developed distant metastatic disease. Two patients who received EBRT had severe complications, one each of grade 3 gastrointestinal complication and pelvic bone insufficiency fracture. CONCLUSION: Adjuvant radiotherapy achieved high DFS and OS with acceptable toxicity in stage I endometrial cancer. VB (with a lower dose per fraction) may be a viable option for selected patients with early-stage endometrial cancer following surgery.

Prognostic analysis of uterine cervical cancer treated with postoperative radiotherapy: importance of positive or close parametrial resection margin.

PURPOSE: To analyze prognostic factors for locoregional recurrence (LRR), distant metastasis (DM), and overall survival (OS) in cervical cancer patients who underwent radical hysterectomy followed by postoperative radiotherapy (PORT) in a single institute. MATERIALS AND METHODS: Clinicopathologic data of 135 patients with clinical stage IA2 to IIA2 cervical cancer treated with PORT from 2001 to 2012 were reviewed, retrospectively. Postoperative parametrial resection margin (PRM) and vaginal resection margin (VRM) were investigated separately. The median treatment dosage of external beam radiotherapy (EBRT) to the whole pelvis was 50.4 Gy in 1.8 Gy/fraction. High-dose-rate vaginal brachytherapy after EBRT was given to patients with positive or close VRMs. Concurrent platinum-based chemoradiotherapy (CCRT) was administered to 73 patients with positive resection margin, lymph node (LN) metastasis, or direct extension of parametrium. Kaplan-Meier method and log-rank test were used for analyzing LRR, DM, and OS; Cox regression was applied to analyze prognostic factors. RESULTS: The 5-year disease-free survival was 79% and 5-year OS was 91%. In univariate analysis, positive or close PRM, LN metastasis, direct extension of parametrium, lymphovascular invasion, histology of adenocarcinoma, and chemotherapy were related with more DM and poor OS. In multivariate analysis, PRM and LN metastasis remained independent prognostic factors for OS. CONCLUSION: PORT after radical hysterectomy in uterine cervical cancer showed excellent OS in this study. Positive or close PRM after radical hysterectomy in uterine cervical cancer correlates with poor prognosis even with CCRT. Therefore, additional treatments to improve local control such as radiation boosting need to be considered.

Clinical outcomes of local excision following preoperative chemoradiotherapy for locally advanced rectal cancer.

PURPOSE: To evaluate the treatment outcomes of local excision following preoperative chemoradiotherapy in patients with locally advanced rectal cancer who have not undergone radical surgery for any reason. MATERIALS AND METHODS: The data of 27 patients with locally advanced rectal cancer who underwent preoperative chemoradiotherapy followed by local excision were analyzed retrospectively. The primary endpoint was the 5-year relapse-free survival rate, and the secondary endpoint was the pattern of recurrence. RESULTS: The median follow-up time was 81.8 months (range, 28.6 to 138.5 months). The 5-year local relapse-free survival (LRFS), distant metastasis-free survival (DMFS), relapse-free survival (RFS), and overall survival (OS) were 88.9%, 81.1%, 77.8%, and 85.0%, respectively. Six (22%) patients developed treatment failure; one (4%) patient had local recurrence only, three (11%) patients had distant recurrence only, and two (7%) patients had both. The 5-year LRFS, DMFS, RFS, and OS for patients with ypT0-1 compared with ypT2-3 were 94.1% vs. 77.8% (p=0.244), 94.1% vs. 55.6% (p=0.016), 88.2% vs. 55.6% (p=0.051), and 94.1% vs. 66.7% (p=0.073), respectively. CONCLUSION: Local excision following preoperative chemoradiotherapy may be an alternative treatment for highly selected patients with locally advanced rectal cancer who have achieved ypT0-1 after preoperative chemoradiotherapy.

Long-term results of forward intensity-modulated radiation therapy for patients with early-stage breast cancer.

PURPOSE: To observe long-term clinical outcomes for patients with early-stage breast cancer treated with forward intensity-modulated radiation therapy (IMRT), including local control and clinical toxicities. MATERIALS AND METHODS: We retrospectively analyzed a total of 214 patients with stage I-II breast cancer who were treated with breast conserving surgery followed by adjuvant breast radiation therapy between 2001 and 2008. All patients were treated using forward IMRT. The whole breast was irradiated to a dose of 50 to 50.4 Gy followed by an 8 to 12 Gy electron boost to the surgical bed. RESULTS: The median age was 46 years (range, 21 to 82 years) and the medial follow-up time was 7.3 years (range, 2.4 to 11.7 years). Stage T1 was 139 (65%) and T2 was 75 (35%), respectively. Ipsilateral breast recurrence was observed in 3 patients. The 5- and 10-year local control rates were 99.1% and 97.8%, respectively. The cosmetic outcome was evaluated according to the Harvard scale and 89.4% of patients were scored as excellent or good. CONCLUSION: The whole breast radiation therapy as an adjuvant treatment using a forward IMRT technique showed excellent long-term local control as well as favorable outcomes of toxicity and cosmesis.

Factors predicting radiation pneumonitis in locally advanced non-small cell lung cancer.

PURPOSE: Thoracic radiotherapy is a major treatment modality of stage III non-small cell lung cancer. The normal lung tissue is sensitive to radiation and radiation pneumonitis is the most important dose-limiting complication of thoracic radiation therapy. This study was performed to identify the clinical and dosimetric parameters related to the risk of radiation pneumonitis after definitive radiotherapy in stage III non-small cell cancer patients. MATERIALS AND METHODS: The medical records were reviewed for 49 patients who completed definitive radiation therapy for locally advanced non-small cell lung cancer from August 2000 to February 2010. Radiation therapy was delivered with the daily dose of 1.8 Gy to 2.0 Gy and the total radiation dose ranged from 50.0 Gy to 70.2 Gy (median, 61.2 Gy). Elective nodal irradiation was delivered at a dose of 45.0 Gy to 50.0 Gy. Seven patients (14.3%) were treated with radiation therapy alone and forty two patients (85.7%) were treated with chemotherapy either sequentially or concurrently. RESULTS: Twenty-five cases (51.0%) out of 49 cases experienced radiation pneumonitis. According to the radiation pneumonitis grade, 10 (20.4%) were grade 1, 9 (18.4%) were grade 2, 4 (8.2%) were grade 3, and 2 (4.1%) were grade 4. In the univariate analyses, no clinical factors including age, sex, performance status, smoking history, underlying lung disease, tumor location, total radiation dose and chemotherapy were associated with grade ≥2 radiation pneumonitis. In the subgroup analysis of the chemotherapy group, concurrent rather than sequential chemotherapy was significantly related to grade ≥2 radiation pneumonitis comparing sequential chemotherapy. In the univariate analysis with dosimetric factors, mean lung dose (MLD), V(20), V(30), V(40), MLDipsi, V(20)ipsi, V(30)ipsi, and V(40)ipsi were associated with grade ≥2 radiation pneumonitis. In addition, multivariate analysis showed that MLD and V30 were independent predicting factors for grade ≥2 radiation pneumonitis. CONCLUSION: Concurrent chemotherapy, MLD and V(30) were statistically significant predictors of grade ≥2 radiation pneumonitis in patients with stage III non-small cell lung cancer undergoing definitive radiotherapy. The cutoff values for MLD and V(30) were 16 Gy and 18%, respectively.

Pathologic complete response of primary tumor following preoperative chemoradiotherapy for locally advanced rectal cancer: long-term outcomes and prognostic significance of pathologic nodal status (KROG 09-01).

OBJECTIVE: To investigate long-term outcomes of locally advanced rectal cancer (LARC) patients with postchemoradiotherapy (post-CRT) pathologic complete response of primary tumor (ypT0) and determine prognostic significance of post-CRT pathologic nodal (ypN) status. BACKGROUND: LARC patients with post-CRT pathologic complete response were suggested to have favorable long-term outcomes, but prognostic significance of ypN status has never been specifically defined in ypT0 patients. METHODS: The Korean Radiation Oncology Group collected clinical data for 333 LARC patients with ypT0 following preoperative CRT and curative radical resections between 1993 and 2007. Sphincter preservation surgery and abdominoperineal resection were performed in 283 (85.0%) and 50 (15.0%) patients, respectively. Postoperative chemotherapy was given to 285 (85.6%) patients. Survival was estimated by the Kaplan-Meier method, and the Cox proportional hazard model was used in multivariate analyses. RESULTS: After median follow-up of 43 (range = 14-172) months, 5-year disease-free survival (DFS) was 84.6% and overall survival (OS) was 92.8%. The ypN status was ypT0N0 in 304 (91.3%), ypT0N1 in 22 (6.6%), and ypT0N2 in 7 (2.1%) patients. The ypN status was the most relevant independent prognostic factor for both DFS and OS in ypT0 patients. The 5-year DFS and OS was 88.5% and 94.8% in ypT0N0 patients, and 45.2% and 72.8% in ypT0N+ patients (both, P < 0.001). CONCLUSIONS: LARC patients achieving ypT0N0 after preoperative CRT had favorable long-term outcomes, whereas positive ypN status had a poor prognosis even after total regression of primary tumor.

A magnetic resonance-based seed localization method for I-125 prostate implants.

This study was performed to develop and evaluate a semi-automatic seed localization algorithm from magnetic resonance (MR) images for interstitial prostate brachytherapy. The computerized tomography (CT) and MR images (3 mm-slice thickness) of six patients who had received real-time MR imaging-guided interstitial prostate brachytherapy were obtained. An automatic seed localization method was performed on CT images to obtain seed coordinates, and an algorithm for seed localization from MR images of the prostate was developed and tested. The resultant seed distributions from MR images were then compared to CT-derived distribution by matching the same seeds and calculating percent volume receiving 100% of the prescribed dose and the extent of the volume in 3-dimensions. The semiautomatic seed localization method made it possible to extract more than 90% of the seeds with either less than 8% of noises or 3% of missing seeds. The mean volume difference obtained from CT and MR receiving 100% of the prescribed dose was less than 3%. The maximum extent of the volume receiving the prescribed dose were 0.3, 0.6, and 0.2 cm in x, y, and z directions, respectively. These results indicate that the algorithm is very useful in identifying seeds from MR image for post-implant dosimety.

Health promotion behaviors and quality of life among community-dwelling elderly in Korea: a cross-sectional survey.

As individuals live longer, health promotion behaviors become even more important, particularly with regard to maintaining functional independence and improving quality of life (QoL). The purpose of this study was to explore the relationship between health promotion behaviors and QoL in Korean elderly living in the community. This study was a descriptive-correlational study to explore the relationship between health promotion behaviors and QoL among the community-dwelling elderly in Korea. A convenience sample of 2000 community residents who were over 65 years old and cognitively intact were selected from 32 senior centers and 242 public health centers in Korea. A total of 1920 were included in the analyses, following the exclusion of 80 incomplete questionnaires and subject refusals. Participants who consented to participate in the study were interviewed by trained interviewers with a structured questionnaire. The results of the study showed that there were statistically significant differences in QoL of the elderly related to exercise participation, alcohol abstinence and blood pressure (BP) check-up (p<.05). Multiple regression analysis revealed that perceived health status, number of chronic illnesses, activities of daily living, BP checkup, exercise, and gender were statistically significant predictors of QoL. R(2) for this whole regression model was .412, indicating that approximately 41.2% of the variance in QoL was accounted for by the linear combination of these variables. Nurses should enhance the QoL in elderly persons by facilitating health promotion behaviors through formal nursing interventions which will maintain and increase a healthy and active life.

[Health status, health perception, and health promotion behaviors of low-income community dwelling elderly].

PURPOSE: The purpose of the study was to investigate the health status(present illness, ADL and IADL), health perception, and health promotion behaviors of low-income elderly who are receiving the visiting nurse service in the community. METHOD: The sample of the study was 735 elderly over 65 years old with basic livelihood security, who were conveniently selected from 245 public health centers nation-wide. Data collection was done using a structured questionnaire through interviews by visiting nurses. RESULT: The average number of present illnesses in the study subjects was 4.18. The average scores of ADL and IADL were 15.903.39 and 9.772.97 respectively, which indicates a relatively independent everyday life. However, 64.2% of the subjects perceived their health status as 'not healthy'. In terms of health promotion behaviors, 77.8% of the subjects had ceased smoking, 83.9% stopped drinking, 56.4% had a regular diet, 45.8% received regular physical check-ups during the past two years, and 66% received flu shots. Approximately 50% of the subjects were practicing 3-4 health promotion behaviors. Significant factors associated with health promotion behaviors were ADL, IADL and self-efficacy. CONCLUSION: Health promotion programs which focus on regular diet, exercise, and regular physical check-ups should be developed to improve independence of everyday life and quality of life among low-income elderly.

Cervical cancer screening in Korean American women: findings from focus group interviews.

PURPOSE: Korean American women have twice the rate of cervical cancer than white women and demonstrate low rates in participation in cervical cancer screening. This study was to describe the perceptions about cervical cancer and factors related to cervical cancer screening among Korean American women. METHOD: Focus group methods. RESULT: Five themes emerged. First, knowledge about cervical cancer; misconceptions about cervical cancer, its causes, reproductive anatomy and the treatment. Second, perceived meanings of having cervical cancer; most of the women felt that cervical cancer represented a loss of femininity and existential value of womanhood. Third, knowledge about cervical cancer screening ; regular medical check-ups were necessary for early detection and prevention of cervical cancer. Fourth, experiences and perceived meanings of cervical cancer screening; the participants expressed their feelings; embarrassment, fear, shame and shyness. Fifth, practices of cervical cancer screening; various intervals in participating in cervical cancer screening. But they mentioned several deterrents, language, insurance, time constraint, embarrassment, fear of the screening results, misbelief about susceptibility, lack of health prevention behavior, and lack of information written in Korean. CONCLUSION: Results emphasize the critical need for culturally appropriate health education to encourage participation of Korean American women in cervical cancer screening.