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Biomedical subjects

E A Bastounis

Publications and source records attributed to E A Bastounis.

At least 19 recordsLinked to original sources
PubMed2006

Surgical treatment of carotid body tumors without embolization.

AIM: Carotid body (CB) paragangliomas are rare neoplasms, usually benign. This study deals with our 10-year experience in their surgical treatment and the evaluation of its effectiveness, without preoperative embolization. METHODS: During a 10-year period, from 1995 to 2004, we studied the medical records of 11 patients with CB tumors, 8 males and 3 females, whom only one had bilateral tumors. Their age ranged from 23 to 65 years (mean 35 years) and all had a palpable neck mass. Only two of the patients were asymptomatic on admission to our department. Twelve tumors were surgically resected and no patient underwent preoperative selective embolism of his tumor. Two patients had carotid endarterectomies with venous patch angioplasty. No one of the patients underwent radiotherapy or chemotherapy. RESULTS: Perioperative mortality was zero. No stroke or any other cerebral event was observed. One patient, with a grade III tumor, had an injury of the internal carotid artery that was repaired with a vein patch. Three patients had temporal cranial nerve lesions that resolved within 3 months. No malignancy was found even in a 10-year follow-up. CONCLUSIONS: Early surgical treatment is strongly recommended in almost all patients. Their resection is a very challenging operation with good postoperative results. Preoperative embolism of the tumor does not need to be a routine procedure. To exclude malignancy, long term follow-up is necessary.

Adult↗
PubMed2006

Simultaneous venous gangrene in both lower and upper limbs. A case report.

Cancer-related venous gangrene is an extremely rare paraneoplastic syndrome. Here, we present the case of a woman, who suffered from cervical cancer of the uterus and was admitted to our Clinic with venous gangrene in both the right lower and upper limbs. Neither the anticoagulant therapy, nor thrombolysis, succeeded in improving her clinical condition. Cancer is one of the most important causes of venous thromboembolism. Venous gangrene is rarely seen in these patients. Despite adequate therapy, venous gangrene in some very rare occasions may progress to affect further limbs. Mortality in these patients remains very high.

Fatal Outcome↗
PubMed2000

Celiac artery compression syndrome.

Celiac artery compression syndrome occurs when the median arcuate ligament of the diaphragm causes extrinsic compression of the celiac trunk. We report a case of a 65-year-old woman who presented with a three-month history of postprandial abdominal pain, nausea and some emesis, without weight loss. There was a bruit in the upper mid-epigastrium and the lateral aortic arteriography revealed a significant stenosis of the celiac artery. At operation, the celiac axis was found to be severely compressed anteriorly by fibers forming the inferior margin of the arcuate ligament of the diaphragm. The ligament was cut and a vein by-pass from the supraceliac aorta to the distal celiac artery was performed. The patient remains well and free of symptoms two and a half years since operation.In this report we discuss the indications and the therapeutic options of this syndrome as well as a review of the literature is being given.

Aged↗
PubMed1999

Therapeutic efficacy of flavonoids in oedema following reperfusion on acutely ischaemic legs.

BACKGROUND: The aim of this study was to investigate the effect of a purified, micronised, flavonoid fraction (Daflon) in lower limb oedema developed after delayed embolectomy and successful reperfusion of acutely ischaemic legs. METHODS: Our series consisted of 19 patients with prolonged, acute ischaemia of the lower extremity caused by arterial embolism, who had undergone successful embolectomy. Patients were randomised into two groups; ten patients (group I) treated with flavonoids, were compared to nine given a placebo. Ankle and calf circumferences, venous capacitance and venous emptying time were measured preoperatively [T1], on the 2nd [T2], 5th [T3], 8th [T4] and 30th [T5] postoperative days. RESULTS: An increase of ankle and calf circumference up to 9% and 13.5% respectively, as compared with preoperative values was demonstrated. There was a reduction in oedema formation in patients with the Daflon group, which reached statistical significance only in the ankles (p=0.0276). Calf differences were statistically significant on the second and fifth postoperative days (p<0.05). Venous haemodynamics were considerably improved by Daflon (p<0.001). CONCLUSIONS: Daflon 500 mg had an inhibitory effect on moderate oedema developed after revascularisation of an ischaemic limb.

Aged↗
PubMed1998

The effect of vertical banded gastroplasty on glucose-induced beta-endorphin response.

BACKGROUND: beta-Endorphin is an endogenous opioid involved in the regulation of food intake and obesity as well as in insulin metabolism. In this study, we investigated glucose-induced beta-endorphin, insulin, and glucose responsiveness in morbidly obese patients and the effect of surgically induced weight loss. METHODS: Thirty-two healthy, nondiabetic, morbidly obese patients (body mass index over 40 kg/m2) and 32 normal-weight controls were studied. Serum levels of beta-endorphin, insulin, and glucose were measured under basal conditions and during an oral glucose tolerance test (OGTT) before and 12 months following vertical banded gastroplasty. RESULTS: Preoperative basal levels of beta-endorphin, insulin, and glucose and their responses during OGTT in obese patients were significantly higher compared with those of controls. After surgery, basal beta-endorphin, insulin, and glucose levels decreased significantly compared with preoperative values. Postoperative basal insulin and glucose levels were similar to those in controls, while beta-endorphin levels remained significantly higher than those of controls. A significant reduction in total responses of beta-endorphin, insulin, and glucose during OGTT was also observed; however, postoperative beta-endorphin and insulin responses remained significantly higher than in controls. CONCLUSION: Morbidly obese patients have an increased glucose-stimulated response of beta-endorphin, insulin, and glucose which is partially corrected with weight loss following vertical banded gastroplasty.

Adult↗
PubMed1998

Sex hormone changes in morbidly obese patients after vertical banded gastroplasty.

Serum sex hormone levels were measured preoperatively in 57 morbidly obese patients (19 men and 38 premenopausal women) and 12 months after vertical banded gastroplasty. In the male group, there was a significant decrease in estradiol and an increase in follicle-stimulating hormone (FSH), total testosterone and sex-hormone-binding globulin (SHBG). Among female patients, a significant decrease in estradiol, total and free testosterone and an increase in FSH and SHBG was found. Irregular menses present preoperatively in 5 women were corrected after successful weight loss. In conclusion, altered sex hormonal levels and gynecologic abnormalities associated with morbid obesity are corrected with adequate weight loss following vertical banded gastroplasty.

Adult↗
PubMed1998

Serum beta-endorphin levels in morbidly obese patients: the effect of vertical banded gastroplasty.

The associations between serum beta-endorphin levels and clinical and metabolic variables as well as beta-endorphin changes after surgically induced weight loss were investigated in 43 morbidly obese patients. A significant positive correlation between beta-endorphin and body weight, degree of body weight increase and ACTH was found preoperatively. Only body weight was independently associated with beta-endorphin levels. Twelve months following vertical banded gastroplasty, there was an extensive weight loss in all patients and improvement in their metabolic profile. A significant reduction in beta-endorphin levels which was proportional to the extent of weight loss was also observed.

Adrenocorticotropic Hormone↗
PubMed1998

The predictive value of dipyridamole-thallium scintigraphy for cardiac risk assessment before major vascular surgery.

BACKGROUND: We prospectively examined the ability of dipyridamole thallium scintigraphy (DTS), as a preoperative screening test, to predict postoperative cardiac complications in patients undergoing peripheral arterial operations. METHODS: From November 1993 to November 1995, a DTS study was routinely performed preoperatively in 167 consecutive patients who underwent arterial operations in our hospital. The clinicians were blinded to DTS results. The type of operation was: carotid endarterectomy (n = 53), abdominal aortic aneurysm repair (n = 45), aortobifemoral bypass (n = 31), femoropopliteal bypass (n = 32) and others (n = 6). Clinical and scintigraphic data were collected and analyzed uni- and multivariantly in order to identify those variables that correlate with postoperative cardiac complications. RESULTS: Fifteen adverse cardiac events (three deaths, five myocardial infarctions, seven unstable anginas) occurred postoperatively among 167 patients (mortality: 1.8%, morbidity: 7.2%). Forty-four patients (26.3%) had a normal scintigraphic study, sixty (35.9%) had fixed defects and sixty-three (37.7%) had reversible defects. The most powerful predictive factors of cardiac complications in the multivariate analysis were the synchronous existence of three markers of coronary artery disease (angina pectoris, previous myocardial infarction, Q sign on ECG) and the presence of a reversible defect in the anterior segment of the left ventricle on DTS study. CONCLUSIONS: This study demonstrates that the careful and detailed clinical examination is of paramount importance in detecting "high risk" patients and that DTS should be performed as a supplementary test since it offers significant information and further classifies patients of intermediate risk to develop postoperative cardiac complications.

Aged↗
PubMed1997

Granulocyte-macrophage colony-stimulating factor improves immunological parameters in patients with refractory solid tumours receiving second-line chemotherapy: correlation with clinical responses.

In this report, we studied the immunorestorative properties of subcutaneously administered granulocyte-macrophage colony-stimulating factor (GM-CSF) in patients with refractory solid tumours receiving second-line chemotherapy. Such patients exhibit abnormal immune responses in vivo and in vitro and, therefore, it was of interest to examine the effect of GM-CSF-induced immunomodulation on clinical response. We examined patients with primary malignant carcinomas (head and neck, n = 10; urogenital tract, n = 17; penis n = 6; colorectal, n = 8) who were treated with carboplatin (JM8), 300 ng/m2 on days 1 and 22, leucovorin (LV), 200 mg/m2 plus 5-fluoracil (5-FU), 500 mg/m2 on days 8, 15 and 29 and four cycles of daily injections with placebo or GM-CSF, 300 micrograms/day on days 3-6, 10-13, 17-20 and 24-27. Peripheral blood was collected from the patients one day after the end of each of the four-cycle injections with placebo or GM-CSF, namely on days 7, 14, 21 and 28. Peripheral blood mononuclear cells (PBMC) were tested in the autologous mixed lymphocyte reaction (AMLR) and for natural killer (NK) or lymphokine-activated killer (LAK) cell activity. Cytokine levels in serum were measured by immunoenzymatic (ELISA) assay. A total of 21 patients received a four-cycle regimen with GM-CSF (Group 1) and 20 were similarly treated with placebo (Group 2). All received standard chemotherapy as outlined above. Before GM-CSF treatment, all patients exhibited increased serum levels of interleukin-1 (IL-1 beta), tumour necrosis factor-alpha (TNF-alpha), IL-6 and prostaglandin E2 (PGE2) and decreased serum levels of IL-2. Cellular immune responses (AMLR, NK- and LAK-cytotoxicity) were also low in all patients. Five patients from Group 1 had a PR (partial response), 2 patients had CR (complete response), and 14 patients had stable disease. Seven patients from Group 2 showed progressive disease, 3 had a PR and 10 had stable disease. All immune parameters were significantly improved during treatment in Group 1 but remained unchanged or even deteriorated in Group 2. Administration of GM-CSF during treatment of cancer patients with conventional chemotherapeutic drugs results in a marked potentiation of deficient cellular immune responses in vitro and a change towards normalisation of cytokine serum levels. The results reported herein support the use of GM-CSF as immunopotentiator during chemotherapy, but more patients must be studied before definite conclusions can be drawn.

Adult↗
PubMed1997

Incidentalomas of the adrenal gland: diagnostic and therapeutic implications.

Incidentally discovered adrenal masses are common since the advent and application of sensitive noninvasive imaging methods. The significance of these so-called "incidentalomas" and the question of further evaluation or treatment remains elusive. This report describes a retrospective study of 86 patients with incidentaloma. Adrenalectomy was performed on 26 patients during initial admission. Histologically, two cortisol-producing adenomas, an adenoma with subclinical cortisol production, and two pheochromocytomas (all of the preceding detected during the preoperative hormonal evaluation), three cystic lesions, one myelolipoma, and one hematoma were found. One primary and two metastatic adrenal carcinomas were also found in this series. Sixty patients with a nonfunctioning incidentaloma smaller than 6 cm were observed in an average of 43 months with serial CT scans performed at 3, 9, and 18 months after the initial diagnosis. Enlargement of the mass was detected in two patients; both proved to be nonfunctioning adenomas. Based on these observations, it is concluded that the initial laboratory evaluation is mandatory in cases of incidentalomas, including parameters of adrenocortical and medullar function. Hormonally active incidentalomas and those suspected for malignancy should be treated surgically. Masses greater than 6 cm should also be removed. Smaller incidentalomas without endocrine activity or signs of malignancy should be followed by CT scan at 3, 9, and 18 months after the initial diagnosis.

Adrenal Gland Neoplasms↗
PubMed1996

Immunohistochemical detection of oestrogen receptors in ductal carcinoma in situ of the breast.

The expression of oestrogen receptor (ER) protein in invasive carcinoma of the breast and its clinical significance has been extensively evaluated. Little information is available regarding ER expression in ductal carcinoma in situ (DCIS). In this study, 46 formalin-fixed, paraffin-embedded tissue specimens of mammographically detected DCIS were evaluated immunohistochemically for the presence of ER using specific monoclonal antibodies against ER (ER-ICA Abbott Lab). The associations between ER expression and histological type, degree of differentiation and patient menopausal status were evaluated. Positive ER staining was present in 72% of cases. Non-comedo types of DCIS were more frequently ER-positive than comedocarcinoma. ER-positive tumours were inversely correlated with the presence of nuclear pleomorphism. The incidence of ER in pre-menopausal and post-menopausal women was similar. In conclusion, ER expression is present in a considerable percentage of DCIS, and ER-positivity is associated with the degree of differentiation and non-comedo carcinoma variants.

Adult↗
PubMed1996

The incidence of occult cancer in patients with deep venous thrombosis: a prospective study.

OBJECTIVE: This study was undertaken to assess a potential relationship between idiopathic deep venous thrombosis (DVT) and occult cancer. DESIGN: Prospective study with a 2-year follow-up. SETTING: The Angiology Unit of the First Department of Surgery, University of Athens, Greece, a tertiary referral centre. SUBJECTS: Two hundred and ninety-three patients with a first episode of venographically or Doppler-proved DVT were included in the study, of whom 264 were followed up for 2 years. INTERVENTIONS: After an initial extensive diagnostic workup, including routine blood counts and chemistries, erythrocyte sedimentation rate, CEA levels, chest X-ray and abdominopelvic CT scan, all patients were closely followed up and periodically examined. MAIN OUTCOME MEASURES: The incidence of cancer amongst patients with idiopathic and secondary DVT, and the validity of our screening programme. RESULTS: Cancer was diagnosed in 21 out of 84 patients with idiopathic DVT (25%) as compared with eight out of 202 patients with secondary DVT (4%). In 22 out of the 29 cases, cancer was detected during the initial admission, and the remaining seven cases were detected during follow-up. Cancer was diagnosed in 15 asymptomatic, healthy individuals, but only in seven of them was the diagnosis made by CT scan. CONCLUSION: Occult cancer is fairly common in patients with idiopathic DVT, but the routine use of extensive diagnostic studies for its detection remains to be validated by further prospective studies.

Causality↗
PubMed1996

Combined vascular reconstruction and adjunctive tissue transfer in the treatment of infected arterial prostheses and tissue defects.

One of the most serious complications in vascular surgery is infection of the vascular arterial prosthesis (VAP) which might lead to loss of limb or even death. Very often infected prostheses are combined with infectious infiltration of the adjacent tissues or even necrosis and their loss. This paper deals with the experience in the management of 5 patients suffering from infection of vascular arterial prostheses in various locations, for by-passing abdominal aorta and distal arteries with loss or necrosis of the skin and tissues adjacent to the graft. Removal of the infected graft was performed in all of the cases, together with wide debridement of the infested area and placement of a new graft, coursing far from the infected area for revascularization of the affected limb. The cleaned infected area was covered at a first or second stage by applying plastic procedures utilizing musculocutaneous tissue transfer. The results were quite satisfactory. We conclude that the management of infected vascular arterial prostheses, when these are combined with loss of adjacent tissues, is a challenge for the Vascular Surgeon. Their removal, extended cleaning and covering of the area by means of plastic procedures with tissue transfer, proved to be effective in the management of this problem.

Blood Vessel Prosthesis↗
PubMed1995

Carotid endarterectomy and patch angioplasty, utilizing a segment of autogenous endarterectomized superficial femoral artery. A case report.

A case of a male patient, who had undergone a left internal carotid endarterectomy and arterial patch angioplasty is presented. After endarterectomy, arteriotomy was completed with a patch taken from the initial segment of a completely occluded superficial femoral artery, which was properly endarterectomized. The technique of arterial patch endarterectomy preservation is described and special emphasis is given to the advantages of deep endarterectomy on the possible beneficial long-term patency, as well as the availability of this autogenous material, in cases where the SFA artery is completely occluded.

Aged↗
PubMed1995

Evaluating the difficult airway. An epidemiological study.

The epidemiological characteristics of 359 difficult intubations resulted from retrospectively collected data in a series of 4.742 individual anaesthetic case records of consecutive adult patients (2392 men, 2350 women) undergoing general anaesthesia for routine surgery. The preoperative assessment of each patient's airway was performed using standardized guidelines. Mandibular length, body weight and mobility of jaw, head and neck were evaluated with simple measurements. The presence of protruding maxilla or upper teeth, tongue tumor or cyst, long narrow mouth, short muscular neck and deviation of larynx or trachea was based on clinical and/or radiological examination. Severity of difficulty in intubation was estimated on a five-point scale grades (0-4) according to the view obtained at laryngoscopy and the final outcome of airway management. Difficult intubation (grades 1-4) was confirmed in 359 cases (7.6%) of which 208 were anticipated (57.2%). The effectiveness of preoperative evaluation had a positive correlation with the level of difficulty since, the greater the grade of difficulty the greater the sensitivity. The prevalence of failed intubation (grade 4) was 0.5%. Risk factors which had been correlated with the relative size of the tongue proved to have low probability and level of difficulty of intubation. The most important risk factor was limited jaw movement (median grade of difficulty: 4, positive predictive value: 75.0%). Large endemic goitre and thalassaemia constitute RFs contributing occasionally to difficult airway. The positive predictive value was 61.5% and 40.9% respectively. The combination of risk-factors had a cumulative impact contributing to the high level of difficulty.

Adolescent↗