Stereotactic body radiation therapy for liver metastasis from colorectal cancer: size matters.

PURPOSE: We analysed our initial experience with SBRT in liver metastasis from colorectal cancer at our institution. MATERIALS AND METHODS: Between January/2014 and December/2017, 22 patients with 31 LMCCR were treated. Local control (LC) was assessed using the Kaplan-Meier and log-rank tests. We analysed potential prognostic factors for LC: sex, PTV size, number of LM and the radiation scheme. RESULTS: Median age: 69 years. Prior chemotherapy or local liver treatments: 81.8% and 63.6% of patients, respectively. SBRT consisted of 3 × 20 Gy (42.9%) and 3 × 15 Gy (31.4%). There were 88.5% responses (57.1% CR and 31.4% PR). Median follow-up was 30 months. LC per lesion at 12 and 24 months was 85.3% and 61.8%, respectively. Tumour volumes > 30 cc correlated with worsened 2-year-control rates (90% vs 34.5%) (p = 0.005). There was only a patient with CTC-grade 3 toxicity. CONCLUSIONS: Liver SBRT is a safe and effective treatment that achieves high local control rates. We found a significant correlation between larger LMCRC and worse local control.

Reirradiación con radioterapia estereotáxica corporal (SBRT) en recidiva irresecable de cáncer de cabeza y cuello: a propósito de un caso / Re-irradiation with SBRT (Stereotactic Body Radiation Therapy) for locoregional unresectable relapse of head and neck cancer: a case report

Los pacientes con recidiva irresecable de un cáncer de cabeza y cuello (CCC) tienen un pronóstico desfavorable, con limitadas opciones de tratamiento. Los recientes avances técnicos permiten administrar la radioterapia (RT) con gran precisión, haciendo posible reirradiar tumores recidivados mediante radioterapia estereotáxica corporal (SBRT), administrando dosis elevadas de RT al mismo tiempo que se protegen los tejidos sanos próximos al tumor. Aunque esta técnica se ha utilizado para irradiar distintos tumores primarios y sus metástasis, la SBRT en cabeza y cuello ha tenido una evolución mucho más lenta que en otras localizaciones debido a las dificultades para reirradiar los CCC, por la toxicidad esperable al tratarse de una zona relativamente pequeña con gran vascularización e inervación, y donde se asientan varios sentidos. Presentamos el primer caso clínico de reirradiación con SBRT de una recidiva de un CCC en el Complejo Hospitalario de Navarra, que mostró respuesta completa y que permanece asintomático dieciséis meses después

Patients with an unresectable recurrence of head and neck carcinoma (HNC) have a poor prognosis, with limited treatment options. Recent technical advances allow radiotherapy (RT) to be handled with great precision, making it possible to re-irradiate recurrent tumors by means of stereotactic body radiotherapy (SBRT) with high doses of RT while protecting healthy tissues near the tumor. Although this technique has been used to irradiate different primary tumors and their metastases, SBRT in HNC has had a much slower evolution than in the mentioned locations. This is due to the difficulties in re-irradiating the HNC, because of the expected toxicity as it is a relatively small area with dense vascularization and innervation, and where several senses are located. We present the first case of a HNC re-irradiated with SBRT in the Complejo Hospitalario de Navarra; the patient showed a complete response and continues to be disease-free sixteen months after the irradiation

[Re-irradiation with SBRT (Stereotactic Body Radiation Therapy) for locoregional unresectable relapse of head and neck cancer: a case report]. / Reirradiación con radioterapia estereotáxica corporal (SBRT) en recidiva irresecable de cáncer de cabeza y cuello: a propósito de un caso.

Patients with an unresectable recurrence of head and neck carcinoma (HNC) have a poor prognosis, with limited treatment options. Recent technical advances allow radiotherapy (RT) to be handled with great precision, making it possible to re-irradiate recurrent tumors by means of stereotactic body radiotherapy (SBRT) with high doses of RT while protecting healthy tissues near the tumor. Although this technique has been used to irradiate different primary tumors and their metastases, SBRT in HNC has had a much slower evolution than in the mentioned locations. This is due to the difficulties in re-irradiating the HNC, because of the expected toxicity as it is a relatively small area with dense vascularization and innervation, and where several senses are located. We present the first case of a HNC re-irradiated with SBRT in the Complejo Hospitalario de Navarra; the patient showed a complete response and continues to be disease-free sixteen months after the irradiation.

Fecal incontinence and radiation dose on anal sphincter in patients with locally advanced rectal cancer (LARC) treated with preoperative chemoradiotherapy: a retrospective, single-institutional study

Background. The objective of the study is to determine the correlations among the variables of dose and the sphincter function (SF) in patients with locally advanced rectal cancer treated with preoperative capecitabine/radiotherapy followed by low anterior resection (LAR) + TME. Methods. We retrospectively reviewed 92 consecutive patients with LARC treated at our center with LAR from 2006 and more than 2 years free from disease. We re-contoured the anal sphincters (AS) of patients with the help of the radiologist. SF was assessed with the Wexner scale (0-20 points, being punctuation inversely proportional to annal sphincter functionality). All questionnaires were filled out between January 2010 and December 2012. Dosimetric parameters that have been studied include V20, V30, V40, V50, mean dose (Dmean), minimum dose (Dmin), D90 (dose received by 90% of the sphincter) and D98. Statistical analysis. The correlations among the variables of dose and SF were studied by the Spearman correlation coefficient. Differences in SF relating to maximum doses to the sphincter were assessed by the Mann-Whitney test. Results. Mean Wexner score was 5.5 points higher in those patients with V20 > 0 compared to those for which V20 = 0 (p = 0.008). In a multivariate regression model, results suggest that the effect of V20 on poor anal sphincter control is independent of the effect of distance, with an adjusted OR of 3.42. Conclusions. In order to improve the SF in rectal cancer treated with preoperative radiotherapy/capecitabine followed by conservative surgery, the maximum radiation dose to the AS should be limited, when possible, to <20 Gy (AU)

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Fecal incontinence and radiation dose on anal sphincter in patients with locally advanced rectal cancer (LARC) treated with preoperative chemoradiotherapy: a retrospective, single-institutional study.

BACKGROUND: The objective of the study is to determine the correlations among the variables of dose and the sphincter function (SF) in patients with locally advanced rectal cancer treated with preoperative capecitabine/radiotherapy followed by low anterior resection (LAR) + TME. METHODS: We retrospectively reviewed 92 consecutive patients with LARC treated at our center with LAR from 2006 and more than 2 years free from disease. We re-contoured the anal sphincters (AS) of patients with the help of the radiologist. SF was assessed with the Wexner scale (0-20 points, being punctuation inversely proportional to annal sphincter functionality). All questionnaires were filled out between January 2010 and December 2012. Dosimetric parameters that have been studied include V 20, V 30, V 40, V 50, mean dose (D mean), minimum dose (D min), D 90 (dose received by 90% of the sphincter) and D 98. STATISTICAL ANALYSIS: The correlations among the variables of dose and SF were studied by the Spearman correlation coefficient. Differences in SF relating to maximum doses to the sphincter were assessed by the Mann-Whitney test. RESULTS: Mean Wexner score was 5.5 points higher in those patients with V 20 > 0 compared to those for which V 20 = 0 (p = 0.008). In a multivariate regression model, results suggest that the effect of V 20 on poor anal sphincter control is independent of the effect of distance, with an adjusted OR of 3.42. CONCLUSIONS: In order to improve the SF in rectal cancer treated with preoperative radiotherapy/capecitabine followed by conservative surgery, the maximum radiation dose to the AS should be limited, when possible, to <20 Gy.