[Examination of Exposure Dose by Procedure in Cerebral Angiography].

OBJECTIVE: In cerebral angiography, the patient's exposure dose varies greatly depending on the target site, purpose, and difficulty of the procedure. Therefore, it is necessary to manage the dose based on not only the disease but also the procedure. METHODS: In this study, diagnostic cerebral angiography (diagnosis group) was classified into 13 procedures and neuro-interventional radiology (treatment group) was classified into 10 procedures, and the total dose, fluoroscopy dose, radiographic dose, fluoroscopy time, and number of radiographic frames were compared. RESULTS: For each item, the treatment group was significantly higher than the diagnosis group, but for some, the diagnosis group exceeded the median of treatment group. For the diagnosis group, the total irradiation time and fluoroscopy time were significant, and for the treatment group, all the items showed significant differences due to differences in procedures, and there were also cases where the same disease had differences due to procedures. CONCLUSION: To manage patient exposure in cerebral angiography, it is necessary to manage the usage rate and dose of fluoroscopy and radiography. In addition, it is important to evaluate, manage, and optimize the total dose, fluoroscopic dose, and radiographic dose for each procedure in not only the treatment group but also the diagnosis group.

Ovarian metastases from ileum cancer in a patient with germline EPCAM gene deletion successfully treated with surgical resection and CAPOX chemotherapy: a case report.

BACKGROUND: Despite recent findings that epithelial cell adhesion molecule (EPCAM) deletions can cause Lynch syndrome (LS), its clinical characteristics are still unknown. We present the first case of ileum cancer in a patient with germline EPCAM gene deletion, which was discovered during ovarian tumor surgery. CASE PRESENTATION: A 59-year-old woman presented with a history of colon cancer occurring at 38 and 55 years old. Five of her siblings had a history of colon cancer, and an elder sister had confirmed LS. As imaging examination revealed an ovarian tumor, and we performed hysterectomy and bilateral salpingo-oophorectomy. Careful observation during surgery revealed a cherry-sized tumor in the ileum, prompting partial ileal resection. Pathological examination showed the ovarian tumor to be a metastasis of ileum cancer. Genetic testing with blood-relative information using multiplex ligation-dependent probe amplification showed EPCAM exons 8 and 9 deletions, confirming LS. The patient received adjuvant chemotherapy with CAPOX (capecitabine and oxaliplatin) and has remained disease-free for 24 months. CONCLUSIONS: We were fortunate to identify ileum cancer that would have been difficult to find preoperatively through careful observation during ovarian tumor surgery and successfully treated the patient by using surgical resection and CAPOX chemotherapy. When treating patients with hereditary cancer syndromes including LS, we should keep all associated cancers in mind.

Prevalence of venous thromboembolism at pretreatment screening and associated risk factors in 2086 patients with gynecological cancer.

AIM: Postoperative pulmonary embolism can be a fatal surgical complication and is thought to occur secondary to asymptomatic venous thromboembolism (VTE) that exists preoperatively in some patients. The purpose of this study was to clarify the frequency and risk factors of pretreatment VTE in gynecological cancer patients. METHODS: This study investigated 2086 patients with gynecological cancer (cervix, n = 754; endometrium, n = 862; ovary, n = 470) who underwent initial treatment between 2004 and 2017. Pretreatment VTE screening was performed with D-dimer (DD) levels in these patients. Based on this, the associated risk factors were retrospectively analyzed. RESULTS: Pretreatment VTE was discovered in 7.3% of patients with cervical cancer, 11.5% of those with endometrial cancer and 27.0% of those with ovarian cancer. Significant independent risk factors were: age greater than or equal to 60 years and tumor long diameter greater than or equal to 40 mm for cervical cancer; age greater than or equal to 60 years, stage III/IV advanced disease, clear cell carcinoma and tumor long diameter greater than or equal to 60 mm for endometrial cancer; and age greater than or equal to 60 years, clear cell carcinoma and massive ascites for ovarian cancer. CONCLUSION: Pretreatment asymptomatic VTE is very frequent in gynecological cancer patients. It may be beneficial to consider measuring DD or performing venous ultrasonography in patients with the above risk factors.

Predictors of favorable survival after secondary cytoreductive surgery for recurrent endometrial cancer.

OBJECTIVE: The selection criteria for secondary cytoreductive surgery (SCS) for recurrent endometrial cancer (EC) remain to be defined. The present study aimed to identify predictors for favorable survival after SCS for the disease. METHODS: We retrospectively reviewed the medical records of 112 patients who relapsed by 2016 among 1052 who were diagnosed with primary EC between 1985 and 2014. Characteristics associated with overall survival (OS) after SCS were identified using univariate and multivariate analyses. RESULTS: Twenty-nine of the 112 patients who relapsed underwent SCS. Complete resection was achieved in 18 (62%) patients, whose OS after SCS was significantly better than that of patients receiving incomplete resection (68 vs. 20 months; p = 0.001). Endometrioid histology and performance status (PS) 0 were significant and independent factors for a favorable OS (p = 0.005, and 0.049). The OS of patients with both factors was better than patients with one or no factors (median 75, 19 and 4 months; p = 0.001 and 0.00001). The number of predictors was associated with the rate of complete resection (p = 0.001). CONCLUSIONS: Patients with endometrioid histology and PS 0 should be offered SCS for recurrent EC. Prospective trials are warranted to verify this proposal.

Development of MRI phantom equivalent to human tissues for 3.0-T MRI.

PURPOSE: A 3.0-T MRI phantom (called the CAGN-3.0T phantom) having human-equivalent relaxation times and human-equivalent conductivity was developed. METHODS: The ingredients of the phantom are carrageenan (as a gelatinizer), agarose (as a T2-relaxation modifier), GdCl3 (as a T1-relaxation modifier), NaCl (as a conductivity modifier), and NaN3 (as an antiseptic). Numerous samples with varying concentrations of agarose, GdCl3, and NaCl were prepared, and T1 and T2 values were measured using 3.0-T MRI. RESULTS: The T1 values of the CAGN-3.0T phantom were unaffected by NaCl, while the T2 values were only slightly affected. Based on the measured data, empirical formulae were devised to express the relationships between the concentrations of agarose, GdCl3, and NaCl and the relaxation times. The formula for expressing the conductivity of the CAGN-3.0T phantom was obtained. CONCLUSIONS: By adjustments to the concentrations of agarose, GdCl3, and NaCl, the relaxation times and conductivity of almost all types of human tissues can be simulated by CAGN-3.0T phantoms. The phantoms have T1 values of 395-2601 ms, T2 values of 29-334 ms, and conductivity of 0.27-1.26 S/m when concentrations of agarose, GdCl3, and NaCl are varied from 0 to 2.0 w/w%, 0 to 180 µmol/kg, and 0 to 0.7 w/w%, respectively. The CAGN-3.0T phantom has sufficient strength to replicate the torso without using reinforcing agents, and can be cut with a knife into any shape.

Development of a human-tissue-like phantom for 3.0-T MRI.

PURPOSE: A 3.0-T MRI phantom having human-tissue-equivalent relaxation times was developed. METHODS: The ingredients of the phantom are carrageenan (for gelatinization), GdCl(3) (as a T(1)-relaxation modifier), agarose (as a T(2)-relaxation modifier), and NaN(3) (as an antiseptic agent). Numerous samples with varying concentrations of GdCl(3) and agarose were prepared, and T(1) and T(2) were measured using 3.0-T MRI. RESULTS: Relaxation times of the phantom samples ranged from 395 to 2601 ms for T(1) values and 29 to 334 ms for T(2) values. Based on the measured results, empirical formulae were devised to express the relationships between the concentrations of relaxation modifiers and relaxation times. CONCLUSIONS: Adjustment of GdCl(3) and agarose concentrations allows arbitrary setting of relaxation times, and the creation of a phantom that can mimic relaxation times of human-tissue. Carrageenan is considered the most suitable as a gelling agent for an MRI phantom, as it permits the relatively easy and inexpensive production of a large phantom such as for the human torso, and which can be easily shaped with a knife.