Combined use of a petal flap and V-Y advancement flap for reconstruction of presacral defects following rectal resection.

BACKGROUND: The aim of this study was to evaluate the efficacy of a combination of flaps for the reconstruction of presacral defects following abdominoperineal resections: a paramedian vertically oriented caudally based lotus petal flap for presacral defects combined with a horizontal V-Y advancement flap for closure of the superficial donor site defect. METHODS: A retrospective study was conducted on patients with a residual defect following an abdominoperineal resection between 2010 and 2017 in the Noordwest Ziekenhuisgroep. The primary endpoint was complications related to the reconstruction. RESULTS: Twelve patients were included, all reconstructions healed well. Three patients had a grade I or II complication (Clavien Dindo classification). CONCLUSIONS: Use of a petal flap and V-Y advancement flap for reconstruction of presacral defects was found to be safe and simple, and should, therefore, be considered in the management of such problems.

Endometrial safety after 5 years of continuous combined transdermal estrogen and intrauterine levonorgestrel delivery for postmenopausal hormone substitution.

OBJECTIVE: To investigate endometrial histology and thickness of the endometrium after long-term use of continuous transdermal estrogen substitution combined with intrauterine release of levonorgestrel (LNG) in postmenopausal women. DESIGN: A 5-year non-comparative prospective clinical trial. SUBJECTS: Out of 182 symptomatic postmenopausal women using estrogen substitution therapy (EST) combined with a novel T-shaped LNG-releasing intrauterine system (Femilis Slim LNG-IUS), to prevent endometrial proliferation and bleeding, only those women (n=102) who used two consecutive LNG-IUSs, were isolated with the aim to study the long-term effects on the endometrium. The mean age of the women was 57 years (range 47-71). The majority of women received percutaneous 17beta estradiol, 1.5mg daily, or an equivalent dose by patch or orally, on a continuous basis. MAIN OUTCOME MEASURES: Endometrial histology and ultrasonographic evidence of endometrial suppression, after a period of approximately 5 years of use. The mean duration of use of the regimen was 70 months (range 25-98). RESULTS: The dominant endometrial histologic picture was that of inactive endometrium characterized by glandular atrophy and stroma decidualization (Kurman classification 5b). No cases of endometrial hyperplasia were found. On transvaginal ultrasound, this corresponds with a thin endometrium (< or = 5 mm). CONCLUSION: The results of this 5-year study in 102 postmenopausal women using EST demonstrates that the LNG-IUS effectively opposes the estrogenic effect on the endometrium resulting in strong suppression during the entire period of EST. Due to its high efficacy and absence of systemic effects on organ tissues (e.g., breasts), target delivery in the uterine cavity could be a preferred route to administer a progestagen in women using EST.

Endometrial safety with a low-dose intrauterine levonorgestrel-releasing system after 3 years of estrogen substitution therapy.

OBJECTIVE: To evaluate the pharmacodynamic effects of a novel intrauterine drug delivery system, FibroPlant-levonorgestrel (LNG), on the endometrium in 24 postmenopausal women using estrogen substitution therapy (EST) to suppress climacteric symptoms. DESIGN: A 3-year non-comparative prospective clinical trial. SUBJECTS: The treatment with the FibroPlant-LNG intrauterine system (IUS), releasing 14 microg of LNG per day, was part of a regimen for estrogen substitution therapy in symptomatic postmenopausal women to prevent endometrial proliferation and bleeding. The majority of women received percutaneous 17 beta estradiol, 1.5 mg daily, or an equivalent dose by patch or orally, on a continuous basis. OUTCOME MEASURES: Menstrual pattern, endometrial histology and ultrasonographic evidence of endometrial suppression, after 3 years of use. RESULTS: The endometrial histology specimen showed profound endometrial suppression with glandular atrophy and stroma decidualization in all women. On transvaginal ultrasound, this corresponds with a thin endometrium (<5 mm) and clinically with a "bleed-free" menstrual pattern or amenorrhoea. CONCLUSION: The results of this 3-year study in 24 postmenopausal women using EST suggest that the FibroPlant-LNG IUS is effective in causing strong suppression of the endometrium during the entire period of EST. Target delivery in the uterine cavity could be the preferred route of administering a progestin to oppose estrogen stimulation of the endometrium.

High-dose preoperative radiotherapy does not alter the strength of unilaterally irradiated colon anastomoses in rats.

PURPOSE: We studied the influence of preoperative radiotherapy on the strength of colon anastomoses in rats. We compared a conventional (2 Gy/fraction; 1 fraction/day; 5 days/week; cumulative doses of 40.0, 60.0, and 80.0 Gy) and a hyperfractionated schedule (1.6 Gy/fraction, 2 fractions/day, 5 days/week, cumulative doses of 41.6, 60.8, and 80.0 Gy). We compared unilaterally with bilaterally irradiated anastomoses for two conventional radiation schedules. METHODS AND MATERIALS: The rectosigmoid was always irradiated. Depending on the experiment, the cecum was irradiated or not. A side-to-side anastomosis between rectosigmoid and cecum was constructed the day following the last irradiation. The strength of the anastomosis was evaluated by means of a bursting pressure (BP) measurement after 10 days. A control group and a sham-treated group were carried out. RESULTS: Compared to controls, the strength of unilaterally irradiated anastomoses was not altered and BP values were independent of the radiation schedule and of the cumulative dose. In case of bilaterally irradiated colon anastomoses, anastomotic strength was significantly reduced at 80 Gy, but not at 40 Gy. CONCLUSIONS: After high doses of preoperative radiotherapy, colon anastomoses in rats can be safely constructed if only one anastomotic segment is irradiated. The strength of bilaterally irradiated colon anastomoses is dose-dependent.

Coexistence of an adrenocortical carcinoma with an abdominal ganglioneuroma in a child.

We report a 3-year, 5-month-old boy with an adrenocortical carcinoma. These tumours are rare and highly malignant in childhood. In most cases they are functional, secreting adrenocortical hormones. In this case there was a misleading coexistence with a second abdominal neoplasm, which was a ganglioneuroma; this is a rare benign tumour arising from the sympathetic nervous system. The imaging investigations and their findings are discussed and correlated with pathology.

Immunohistochemical analysis of E-cadherin expression in human colorectal tumours.

The homotypic homophilic cell-cell adhesion molecule E-cadherin is crucial in the organization and maintenance of most epithelia. The expression of E-cadherin was studied immunohistochemically in various human colorectal tumours. Therefore we stained 1 tubular adenoma with low grade dysplasia, 18 adenocarcinomas with different histologic degrees of differentiation and invasion, and 1 metastasis using a modified peroxidase-anti-peroxidase technique. In the adenoma as well as in all well differentiated adenocarcinomas we found E-cadherin immunopositivity at the cell membrane of almost all cancer cells. The immunopositivity of E-cadherin was clearly weaker and sometimes even absent in isolated neoplastic cells and glands of less differentiated adenocarcinomas. The moderately differentiated adenocarcinomas showed an intermediate staining pattern. These findings are in line with experimental evidence that downregulation of E-cadherin favours invasion, eventually leading to metastasis.

Expression of T cell receptors alpha beta and gamma delta in the ileal mucosa of patients with Crohn's disease and with spondylarthropathy.

The expression of the alpha beta and gamma delta heterodimer of the T cell receptor (TCR) was studied in normal human ileal mucosa or in ileal biopsies featuring Crohn's disease or acute and chronic spondylarthropathy-related gut inflammation. With an immunohistochemical technique we demonstrated that the increase of mucosal lymphocytes per mm mucosa in Crohn's disease and spondylarthropathy-related ileitis is exclusively due to expansion of the alpha beta + T cell compartment. In Crohn's disease and chronic ileitis observed in some spondylarthropathy patients the alpha beta + T cells were increased amongst intraepithelial lymphocytes (IEL). The lamina propria lymphocytes (LPL) were augmented in all studied inflammatory conditions. The gamma delta + T cells showed no changes in IEL or LPL and their proportions were not altered. They were evenly dispersed throughout the ileal mucosa and did not seem to participate in the inflammatory process. This study confirms that gamma delta T cells are a distinct subset in the intestinal mucosa. The increase in alpha beta + T cells suggests augmented mucosal antigen handling and involvement of the major histocompatibility complex in the pathogenesis of spondylarthropathy-related gut inflammation and Crohn's disease.