Intensity-modulated Radiotherapy and Anal Cancer: Clinical Outcome and Late Toxicity Assessment.

AIMS: To assess the potential impact on long-term consequences of treatment (intensity-modulated radiotherapy with concomitant chemotherapy) in patients diagnosed with anal cancer. MATERIALS AND METHODS: We identified 43 eligible patients treated with concomitant chemoradiotherapy (pelvic intensity-modulated radiotherapy) at the Royal Marsden Hospital between 2010 and 2013. We determined late genitalia and bowel side-effects using specific questionnaires [Pelvic Symptom Questionnaire, Vaizey Incontinence Questionnaire, Inflammatory Bowel Disease Questionnaire (IBDQ) and IBDQ-B]. Using descriptive statistics, we report clinical outcomes in all patients, by time, since the end of treatment (grouped as 1-1.5, 1.5-2.5 and 2.5-3.5 years). RESULTS: Twenty-seven of 43 (63%) patients were identified as available for questionnaire follow-up. Reasons for unavailability were death (n = 3), lost to palliative care service (n = 1), referred to surgery (n = 4), lost to follow-up (n = 8). In the 27 patients studied, bowel toxicity was assessed by IBDQ, IBDQ-B and the Vaizey Incontinence Questionnaire. The median value was 208 for IBDQ, 38 for IBDQ-B and 3.0 for the Vaizey Incontinence Questionnaire, as assessed at 1 year or more post-completion of treatment. Treatment was reported to affect quality of life/sexual function in two of the female patients (n = 21) and three male patients (n = 6). No insufficiency fractures have been reported. Bone marrow function remained stable over the time of the follow-up. CONCLUSIONS: Although there are data supporting a reduction in acute effects using intensity-modulated radiotherapy in anal cancer, there is very little in the literature to establish the late toxicity profile. Our results indicate that there is an effect on bowel and sexual function, but it does not increase over the period observed. These data provide a benchmark against which to compare outcomes with future manipulation in treatment, and provide us with real information to give patients as to the expectation of their functional outcome after treatment.

Cytokines expression in SLE nephritis.

Renal involvement is a common manifestation in course of systemic lupus erythematous (SLE) and may occur at any time. In SLE nephritis, the pattern of glomerular injury is primarily related to the formation of the immune deposits in situ, due major to antidouble-stranded DNA (anti-dsDNA) antibodies and anti- C1q. Immune complexes deposits can induce the inflammatory response by activation of adhesion molecules on endothelium, resulting in the recruitment of pro inflammatory leukocytes. Activated and damaged glomerular cells, infiltrating macrophages, B and T cells produced cytokines that play a pivotal role as inflammatory mediators to extend renal injury. In serum of SLE patients, the concentrations of IL-6, IL-17, IL-12, INF-gamma, IL-18, IL-10 and TNF-alpha are higher than healthy people and this increase correlate with disease activity. It is well established possible correlation between urinary cytokines levels (IL-6, IL-10, INF-gamma and TGF-beta) and disease activity. In fact, Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) correlate with cytokines over-expression, in particular IL-17, IL-10, TNF-alpha and the axis INF-gamma/IL-12. Recent studies are promising about proteinuria reduction and improving renal function through cytokine blockade therapy.

Relationship between the shape and size of radiofrequency induced thermal lesions and hepatic vascularization.

AIMS AND BACKGROUND: The aim of this study was to evaluate the relationship between hepatic vascularisation and the final size and shape of radiofrequency (RF) induced thermal lesions. METHODS: Series of four RF thermal lesions were created in explanted calf livers and in pig livers maintaining the following experimental conditions throughout the procedure: normal hepatic perfusion, occlusion of the hepatic artery, occlusion of the portal vein, occlusion of both hepatic artery and portal vein (Pringle maneuver) and subtotal occlusion of the hepatic veins. A 14G expandable needle electrode was used to make the thermal lesions. Each lesion was created applying predetermined temperatures ranging between 95 and 115 degrees C and an exposure time of 20 minutes. RESULTS: Occlusion of the hepatic artery during the RF procedure resulted in moderate and not significant increases in thermal lesion diameter compared with those obtained in normally perfused liver (3.0 +/- 0.4 cm vs 3.0 +/- 0.2 cm), while occlusion of the portal vein resulted in larger lesion diameters (3.5 +/- 0.3 cm). In both these cases the diameters of the thermal lesions were smaller than those obtained in explanted calf liver (4.0 +/- 0.3 cm) and their shape showed peripheral irregularities. Thermal lesions larger than those seen in normally perfused liver and equaling those observed in explanted calf liver were created both during the Pringle maneuver (4.0 +/- 0.2 cm) and after subtotal occlusion of the hepatic veins (4.0 +/- 0.3 cm). In both these cases the thermal lesions were regular in shape. CONCLUSIONS: Occlusion of the blood flow during the RF procedure avoids heat loss by convection, resulting in the creation of larger thermal lesions than those obtained in normally vascularized liver using the same electrode, temperatures and exposure time. This technique could therefore be employed in humans to destroy large hepatic tumor nodules.