Biomedical subjects

Fabio Pretolesi

Publications and source records attributed to Fabio Pretolesi.

9 recordsLinked to original sources

PubMed2006

Acute obstruction of the afferent loop caused by an enterolith.

Afferent loop obstruction is a relatively rare but significant complication of Billroth II gastrojejunostomy. We report the imaging findings in a patient in whom obstruction presented acutely and was due to the presence of an enterolith. CT showed dilatation of both the main pancreatic duct and the biliary ducts, and a markedly dilated afferent loop within which a 5-cm mass was present. The lesion had a heterogeneous, laminated appearance and did not show any contrast enhancement. Edema of fatty tissues surrounding the pancreatic tail, which extended to the left pararenal spaces, a small amount of free peritoneal fluid surrounding the spleen, and an aneurysm of the splenic artery of about 3 cm were also present. The diagnosis of afferent loop obstruction has to be considered in patients with previous Billroth II gastrojejunostomy who present with acute abdominal pain and laboratory findings indicating pancreatitis. Although rarely, an enterolith can be the cause of obstruction. CT allows to establish the diagnosis.

Afferent Loop Syndrome↗

PubMed2006

Benign lymphoepithelial parotid lesions in vertically HIV-infected patients.

Benign lymphoepithelial parotid lesions (BLL) are frequently reported in HIV-infected patients, although their clinical and prognostic significance in HIV infection has not been clearly defined. Ultrasonography (USG) has been shown to be a reliable method in monitoring the progression of such lesions. The purpose of this study was to describe the spectrum of sonographic and Doppler findings and to monitor any clinically evident physical change of parotid glands in a cohort of congenitally HIV-infected patients taking antiretroviral therapy. USG findings-based on their severity-have been grouped in three different patterns (0, 1, 2). Our cohort consisted of 51 patients with HIV in various Centers for Disease Control (CDC) stages and being given different antiretroviral protocols. The median USG follow-up was 36 months. The most frequent USG pattern was aspecific parotid gland enlargement (type 0, 45,1%). Patients with either lower CD4+ % (p < 0.20) and higher absolute and percent CD8+ cell count (p < 0.001 and p < 0.003) presented more frequently a type 2 USG pattern. None of them had any symptoms ascribed to "sicca syndrome" and only one patient developed non-Hodgkin's lymphoma during the follow-up, although his USG pattern at baseline was type 0. In summary, the spectrum of USG findings of BLL in vertically HIV-infected patients is broad. Because of the reported, although rare, possible malignant transformation of BLL in HIV-infected children, it is advisable to perform-even in asymptomatic patients-USG at least once per year or in concomitance with any physical modification of the parotid lesions.

Adolescent↗

PubMed2005

Crohn disease obstruction of the biliopancreatic limb in a patient operated for biliopancreatic diversion for morbid obesity.

Although rare, patients with biliopancreatic diversion for morbid obesity will be subject to obstruction of the biliopancreatic limb. This condition is commonly due to postoperative adhesions and intussusception and usually presents with misleading clinical and radiographic features that can delay the diagnosis and the treatment. We recently encountered a patient with obstruction of the biliopancreatic limb due to involvement from Crohn disease. We report this case to highlight the clinical and imaging findings of this rare condition.

Biliopancreatic Diversion↗

PubMed2004

Bilateral epidermoid cysts of the testis: sonographic and MRI findings.

Epidermoid cysts of the testis are rare benign lesions, without malignant potential, that can be managed conservatively with cyst enucleation and testis-sparing surgery. Bilateral epidermoid cysts in the testes have been reported very infrequently. We report the sonographic and MRI findings in a patient who presented with a palpable nodule in only 1 testis, but in whom sonography showed bilateral lesions. On sonography, the cysts had an internal "onion-ring" structure; color Doppler signals were absent. On MRI, the cysts had a laminated appearance, with alternating low- and high-signal-intensity areas on T2-weighted images. These imaging findings and the negative results of laboratory tests for tumor markers suggested the correct diagnosis, and testis-sparing surgery could be performed.

Adult↗

PubMed2002

Radiology of patients with vertical banded gastroplasty.

BACKGROUND: The authors evaluated the usefulness of routine traditional radiology in the management of patients submitted to VBG. METHODS: Radiological findings in 65 subjects who had undergone VBG were evaluated. Post-surgical clinical and radiological examinations were performed 3 days, 1, 4 and 12 months after surgery. Upper GI symptoms, gastroesophageal imaging and 80% solid meal pouch emptying time were recorded. RESULTS: The routine postoperative study, in the absence of clinical symptoms, showed no unsuspected complication in any patient, both in the early and in the late postoperative period. There was no significant correlation at 4 and 12 months between emptying time and duration of satiation, emptying time and percent excess weight loss (%EWL), and duration of satiation and %EWL. CONCLUSIONS: Traditional radiological studies can be safely omitted from both the immediate postoperative period and from the long-term follow-up in asymptomatic VBG patients. The studies were not helpful in understanding functional changes leading to weight loss after VBG.

Adult↗

PubMedDate not supplied

CT-guided superior hypogastric plexus block.

PURPOSE: This study reports our experience with CT-guided block in the superior hypogastric plexus, using a single needle and anterior approach, in patients with pelvic cancer. METHOD: Ten patients with pelvic malignancy underwent CT-guided hypogastric neurolytic block with alcohol via an anterior approach. A solution of 10, 15, or 20 ml of alcohol, 4 ml of bupivacaine HCl, and 2 ml of contrast medium was injected. The results were evaluated based on pain relief, using a four-grade analogue scale. RESULTS: CT images always showed spread of solution around the iliac vessels. Pain relief was complete in four cases, moderate in two, mild in three, and none in one. Best results were observed with the largest amounts of alcohol. CONCLUSION: CT-guided percutaneous superior hypogastric block is a safe, relatively easy, and effective procedure in patients with severe pain from pelvic malignancies.

Aged↗

PubMedDate not supplied

Thirteen years of follow-up in patients with adjustable silicone gastric banding for obesity: weight loss and constant rate of late specific complications.

BACKGROUND: Despite its simplicity, safety and good short-term results, progressive weight regain and a high incidence of complications have been reported after the adjustable silicone gastric banding (ASGB). The aim of this study is to evaluate the long-term results of this operation in our patient population. METHODS: Between 1990 and 1996, 45 morbidly obese patients underwent insertion of an ASGB. The trend of the patients' BMI over time was studied using a linear mixed effect model adjusted for the preoperative BMI. So as to estimate the cumulative probability of band removal and the cumulative hazard function, Lambda(t) Kaplan-Meier analysis was used. RESULTS: 1 year after the operation, the average BMI was 79% of its preoperative value, which then increased linearly over time. The slope of the regression line was estimated at beta =0.42, indicating an average increase of 0.42 BMI units per year. 27 bands (60%) were removed because of specific late complications. The cumulative risk of band removal increased linearly with time. The hazard rate was estimated to be lambda =0.008 events/patient/month, corresponding to 0.1 events/patient/year. CONCLUSIONS: ASGB yielded good short-term results, but the progressive weight regain and constant risk of complications in the long term tend to nullify the optimism.

Adult↗

PubMedDate not supplied

Use of the sonographic contrast medium in the study of pelvic masses: preliminary remarks.

PURPOSE: To evaluate the role of intravenously injected sonographic contrast medium (CM) in characterising space-occupying pelvic lesions. MATERIALS AND METHODS: Forty-seven women with palpable pelvic mass underwent color Doppler US before and after the intravenous injection of an ultrasound CM. The examination results were divided into three categories: Class I = no additional diagnostic information supplied by the contrast-enhanced examination; Class II = the use of CM facilitated the identification of vascular structures but did not significantly affect the diagnosis or the patient's subsequent diagnostic/therapeutic procedures; Class III = the information obtained significantly affected treatment decisions regarding the single patients. RESULTS: After the CM injection, 9/47 (19.1%) cases were assigned to Class I, 25/47 (53.2%) to Class II, and 13/47 (27.7%) to Class III. At baseline, all 13 lesions later assigned to Class III had shown an avascular appearance or only peripheral vascularisation. This type of vascular distribution was confirmed by the contrast-enhanced study, which helped determine the haemorrhagic nature (with solid appearance) of some lesions, or support the hypothesis put forward during the baseline study, that the lesion was a poorly vascularised benign mass. This lent further support to our choice to undertake a laparoscopic surgical approach in 2 lesions, it altered our decision as to the type of surgery to be performed (laparoscopy vs. laparotomy) in 5 patients, and confirmed our intention to undertake only the follow-up in the 6 remaining cases. CONCLUSIONS: The use of the sonographic CM proved clinically useful in 13/47 patients with space-occupying pelvic lesions. The most important result of this examination was its ability to confirm the nonvascular or poorly vascular component of a lesion, and therefore to suggest its benign nature.

Adult↗

PubMedDate not supplied

Imaging of early postoperative complications after polypropylene mesh repair of inguinal hernia.

PURPOSE: We report our experience with the use of US and CT in postoperative complications of inguinal hernioplasty using a prosthetic polypropylene mesh. MATERIALS AND METHODS: This study was divided into two parts. In the first we evaluated the in-vitro sonographic and CT appearance of a fragment of prosthetic mesh. In the second, we retrospectively reviewed the imaging findings in 31 patients (aged 42 to 75 years) examined after inguinal hernia repair between December 2000 and December 2002. Seventeen hernias had been repaired with a laparoscopic approach, and the others with the anterior tension-free technique proposed by Lichtenstein (12 cases) and Trabucco (2 cases). Sonography was performed to assess suspected complications between the second and the fourth postoperative day. Both high-resolution 7.5-10 MHz linear transducers and a 3.5 MHz convex probe were employed to ensure complete evaluation of superficial and deep structures. Eight obese patients also underwent CT for confirmation of the US results. RESULTS: At sonography the prosthetic mesh appeared as a linear hyperechoic image measuring about 2 mm in thickness, with posterior acoustic shadow and a finely irregular surface. Only one of the 17 patients examined after laparoscopic inguinal hernioplasty had a seroma; in the other 14 repaired with the anterior tension-free technique we identified 2 abscesses, 3 seromas, 2 "foldings" of the prosthetic mesh, and 2 mesh displacements with associated recurrence of hernia. CT confirmed the US results as to the presence of fluid collections, and visualised the prosthetic mesh in only 2/8 cases. CONCLUSIONS: Sonography is a useful means of assessing postoperative changes in laparoscopic and in anterior tension-free hernia repair. It can differentiate these complications from recurrences of hernia. Colour-Doppler US can also correctly detect normal blood flow of the testes. Sonography is the only technique that can easily demonstrate the prosthetic mesh in the abdominal wall.

Abscess↗