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PubMedDate not supplied

Bile duct involvement in hepatocellular carcinoma: MR demonstration.

BACKGROUND: To determine the magnetic resonance (MR) features of hepatocellular carcinoma (HCC) with associated bile duct involvement. METHODS: MR examinations of six patients (mean age, 62 years) demonstrating bile duct involvement due to HCC were retrospectively reviewed and compared to surgical and pathologic findings. RESULTS: Three of the tumors were solitary, and three were multifocal. In two patients, MR showed direct biliary duct invasion by tumor. On T1-weighted MR images, four tumors were hypointense compared to the liver and two were isointense. On T2-weighted MR images, four tumors were hyperintense, and two were isointense. The two tumors studied with dynamic T1-weighted MR images obtained after intravenous administration of a gadolinium chelate, displayed enhancement similar to that of the liver. There was no evidence of a tumor capsule on either unenhanced or enhanced MR images. Intrahepatic bile duct dilatation was seen in five patients. The extrahepatic bile duct was normal in all cases. CONCLUSION: Although rare, HCC should be included when considering the etiology of intrahepatic bile duct obstruction. Imaging features suggestive of the diagnosis by MR include intrabiliary tumor or bile duct obstruction with an associated hepatic mass.

Aged↗
PubMed1983

Effects of fenbufen, indomethacin, naproxen, and placebo on gastric mucosa of normal volunteers. A comparative endoscopic and photographic evaluation.

The effects of fenbufen (1,000 mg a day), indomethacin (150 mg a day), naproxen (750 mg a day), and placebo on gastric mucosa were determined by endoscopy and recorded photographically. One hundred normal subjects, randomly divided into equal, parallel-treatment groups, were given the drugs in divided daily doses for seven consecutive days. The results revealed that the effects of fenbufen on gastric mucosa were significantly (p less than or equal to 0.05) less than those of either naproxen or indomethacin and not statistically different from those observed with placebo.

Adult↗
PubMed1987

Light-microscopical appearance and ultrastructure of Blastocystis hominis, an intestinal parasite of man.

A study on Blastocystis hominis was undertaken for the purpose of clarifying the morphology of the organism using the following techniques; Giemsa, Heidenhain Iron Hematoxylin, and DAPI stains, phase-contrast microscopy, and transmission- and scanning-electron microscopy. Microscopic examinations of the lumen fluids aspirated at the endoscopical examination revealed the habitation of B. hominis in the lower ileum and cecum of a patient. When examined light-microscopically, organisms from stool materials, cultures, and aspirated intestinal lumen contents of a patient showed morphological resemblances to each other except for variations in size. Vacuolated cells, which were spherical in shape and characteristically had a large central vacuole and a narrow rim of cytoplasm containing nuclei and some inclusions, were the only form of the organism observed in this study, although the contents of the vacuole notably varied. DAPI stains clearly revealed the nucleus and the possible mitochondrion in the narrow rim of cytoplasm. Phase-contrast microscopy of fresh material prepared with physiological saline was recommended for diagnosis. When examined electron-microscopically, the organisms were coated with a capsule that was composed of fine filamentous materials. All the organisms contained a central vacuole although the contents of it varied considerably. The cytoplasm gave the organism a signet ring appearance and contained cristate mitochondria, a great number of ribosomes, Golgi's apparatuses, cytoplasmic microtubules, and nuclei with a nucleolus. Very few of the ultrastructures are those that would be expected of a yeast. Recent occurrences of B. hominis infection in Kyoto City, Japan, during a two-year period (June 1983 to August 1985) were also reported.

Animals↗
PubMed1996

Assessment of pancreatic parenchymal invasion by bile duct cancer using intraductal ultrasonography.

BACKGROUND AND STUDY AIMS: This study was performed to clarify the diagnostic accuracy of intraductal ultrasonography (IDUS) in assessing pancreatic parenchymal invasion by bile duct cancer. PATIENTS AND METHODS: Preoperative assessment of pancreatic parenchymal invasion was carried out by IDUS via a percutaneous tract or a transpapillary route in 18 patients with extrahepatic bile duct cancer. Various probes with diameters of 1.4, 2.0, 2.4, 2.6 and 3.2 mm, and frequencies of 7.5, 15, 20 and 30 MHz were used. All patients underwent angiography and endoscopic ultrasonography (EUS). In the first six cases, IDUS and EUS images were analyzed retrospectively without knowledge of the operative outcome or the results of other imaging tests. In the subsequent 12 cases, the IDUS und EUS images were prospectively reviewed prior to surgery. The diagnostic accuracy of IDUS was compared with angiography and EUS by means of a histopathological examination of the resected specimens. RESULTS: The accuracy of IDUS, EUS, and angiography in assessing pancreatic parenchymal invasion was 100%, 78% and 61%, respectively. However, IDUS could not assess pancreatic capsular invasion. The accuracy of IDUS in assessing horizontal tumor extension to the intrapancreatic bile duct and to the hepatic side was 83% and 72%, respectively. CONCLUSIONS: IDUS proved useful for assessing the extension of cancer invasion to the pancreatic parenchyma, but not to the pancreatic capsule or mucosal surface.

Aged↗
PubMed2005

Factors that affect gastric passage of video capsule.

BACKGROUND: Gastric retention and delayed gastric emptying of the video capsule are major limitations. We retrospectively studied gastric transit time, gastric retention, and completeness of capsule endoscopy (CE) in relation to the conditions in which it was performed. METHODS: From May 2002 to September 2004, CE was performed in 190 patients (92 men; mean age, 58.4 years, range 16-91 years). Patients were stratified according to the way CE was performed (hospital day setting, outpatient, or ongoing hospitalization), and the recordings were analyzed to measure gastric retention, gastric transit time, and the completeness of the examinations. RESULTS: CE examination was performed in a hospital day setting in 100 patients, in an outpatient setting in 61, and during hospitalization in 29. Gastric retention of the capsule occurred in 8 of 190 patients (4.2%) (5 women, 3 men; mean age, 37.9 years). Gastric retention occurred during hospitalization in 7/29 (24.1%) and in hospital day setting in one of 100. Ongoing hospitalization was statistically associated with an increased risk of gastric capsule retention (p < 0.0001). The cecum was reached in 165/190 (87%), and ongoing hospitalization was associated with a lower rate of complete examinations (p < 0.001). Small-bowel transit time was similar, regardless of the circumstances of CE performance. CONCLUSIONS: Ongoing hospitalization is a major cause of gastric retention and incomplete examination by CE. Therefore, CE performance during ongoing hospitalization may require the use of a prokinetic agent.

Adolescent↗
PubMed1997

A technique for arthroscopic evaluation of the first carpometacarpal joint.

Arthroscopy of the first carpometacarpal joint has been developed as a reliable surgical procedure offering an opportunity for direct evaluation of the joint's intra-articular status, with minimal morbidity to the joint capsule. The procedure uses a 1.9-mm short barrel arthroscope with standard supportive electronic equipment. After adequate anesthesia is established, approximately 5 lb. of longitudinal traction is applied to the thumb. Arthroscopic portals are located on the radial side of the abductor pollicis longus tendon (1-R portal) and the ulnar side of the extensor pollicis brevis tendon (1-U portal). Care must be exercised in establishing these portals so that injury to the radial artery and branches of the superficial radial nerve can be avoided.

Arthroscopes↗
PubMed2006

(Poly)acrylonitrile-based hydrogel as a therapeutic bulking agent in urology.

Vesicoureteral reflux and urinary incontinence can be treated by endoscopic injection. Injectables such as collagen and hyaluronic acid-dextranomer are commonly used, however are not offering optimal therapeutic effect yet. In the present study a novel application for poly(acrylonitrile)-based hydrogel (Hypan), already tested in other clinical indications, has been investigated for its aptitude as an injectable bulking agent. This non-degradable, extremely hydrophilic hydrogel has the capacity of a 6-fold swelling once implanted into the body, assuring the bulking effect. Deposits of this bulking agent have been implanted into the submucosal space of the bladder of 6 minipigs and the histological reaction, as well as the physical implant behavior have been studied over a time period of 6 months. The implants have developed the desired bulking effect by the above-described hydrophilic swelling. They have been enclosed into a fine fibrous tissue capsule and provoked a very limited inflammatory reaction. This study has showed that poly(acrylonitrile)-based hydrogel implants injected into the bladder are well tolerated and, due to their defined bulking ability, feasible for the treatment of vesico-ureteral reflux and urinary incontinence. To determine the therapeutic efficiency of this treatment the implants will be studied in a vesicoureteral reflux and urinary incontinence animal model.

Acrylic Resins↗
PubMed1998

Endoscopic management of colloid cysts.

OBJECTIVE: Several surgical approaches have been proposed for the treatment of colloid cysts, which still remains controversial. The most recent technique used is endoscopy. By its nature, endoscopy cannot offer complete removal, as compared to microsurgical techniques, but can do more than puncture. To evaluate the usefulness of endoscopy for colloid cyst surgery, a series of 15 patients who were operated on for colloid cysts under endoscopic control since 1994 was reviewed. METHODS: The presenting symptoms of our patients (10 men and 5 women) were intermittent headache (10 patients), nausea (3 patients), short-term memory loss (4 patients), coma (2 patients), gait disturbance (3 patients), blurred vision (2 patients), and mental status changes (3 patients). The sizes of the cysts ranged from 4 to 50 mm (median, 22.93 mm). Depending on the radiological appearance, the procedure was performed via a right (10 patients) or left (5 patients) precoronal burr hole. A rigid neuroendoscope was used. Initial stereotactic placement of the neuroendoscope was used in two patients who had moderate hydrocephalus. In the other patients, hand-guided endoscopy was performed using an articulated arm. The cysts were perforated with a needle. The opening was enlarged with microscissors. The cyst material was aspirated, and the remaining capsule was coagulated. RESULTS: The average follow-up was 15.26 months (range, 1-28 mo). Total aspiration of the cysts was achieved in 12 patients, as revealed by normal postoperative magnetic resonance imaging. Control magnetic resonance imaging revealed residual cysts in three patients. One patient presented with an asymptomatic recurrence at 1 year. Resolution of the symptoms was obtained in all patients except for two of the four patients with preoperative memory deficit (improvement without complete recovery). There was no mortality or morbidity. CONCLUSION: These results show that endoscopy is a safe and promising percutaneous technique for the treatment of colloid cysts of the third ventricle. Longer follow-up is, however, still required.

Adult↗
PubMed2006

[Retroperitoneal abscess in a man with severe necrotizing pancreatitis].

HISTORY AND ADMISSION FINDINGS: A 65-year-old man was admitted to the emergency unit of another hospital with severe acute abdominal pain. Medial laparotomy revealed a tear in the lower pole of the capsule of the enlarged spleen. Results of some laboratory tests became available only after the procedure: Lipase and amylase levels were markedly elevated at 5097 U/l (normal range < 100 U/l) and 1776 U/l (normal range < 60 U/l), respectively. These findings suggested acute pancreatitis as cause of the acute abdominal pain. Conservative treatment was initiated, but because of progressive clinical deterioration with fever, dyspnea and tachyarrhythmia he was transferred to our hospital for further treatment. INVESTIGATIONS, DIAGNOSIS AND TREATMENT: Chest X-ray revealed bilateral pleural effusion. Contrast-enhanced abdominal CT scan revealed an acute peripancreatic fluid collection and extensive pancreatic necrosis extending into the perirenal space, hilum of the spleen and transverse mesocolon. Despite the placement of multiple percutaneous pigtail catheters clinical improvement of the severe necrotizing pancreatitis was only temporary and repeated episodes of fever and septicaemia occured. Supported by a multidisciplinary consensus an endoscopic ultrasound (EUS)-guided transgastric drainage of the pancreatic abscess was performed with placement of two double-pigtail catheters and a nasocystic drain for irrigation. After this intervention the patient}s condition rapidly improved, inflammatory parameters normalized and the retroperitoneal abscess gradually resolved. CONCLUSION: A multidisciplinary consensus and modern interventional approaches such as EUS-guided endoscopic therapy are mandatory to successfully approach severe necrotizing pancreatitis and its complications.

Abdomen, Acute↗
PubMed2006

MRCP and MRI findings in 9 patients with autoimmune pancreatitis.

AIM: To evaluate magnetic resonance cholangiopancreatography (MRCP) findings in conjunction with magnetic resonance (MR) images in autoimmune pancreatitis (AIP) patients. METHODS: Nine patients with AIP underwent MRI, MRCP, endoscopic retrograde cholangiopancreatography (ERCP), computed tomography, and ultrasonography. The MRCP and MR images taken before and after steroid therapy were reviewed and compared with other imaging modalities. The MRCP findings of the AIP cases were compared to those of 10 cases with carcinoma of the head of the pancreas. RESULTS: On MRCP, the narrowed portion of the main pancreatic duct noted on ERCP was not visualized, while the non-involved segments of the main pancreatic duct were visualized. The degree of upstream dilatation of the proximal main pancreatic duct was milder than that seen in cases of pancreatic carcinoma. Stenosis or obstruction of the lower bile duct was detected in 8 patients. MR images showed enlargement of the pancreas with decreased signal intensity on T1-weighted MR images, increased signal intensity on T2-weighted MR images, and, in 3 patients, a hypointense capsule-like rim. After steroid therapy, the previously not visualized portion of the main pancreatic duct was seen, along with improvement of the bile duct stenosis. Pancreatic enlargement decreased, and the abnormal signal intensity on both T1- and T2-weighted MR images became isointense. CONCLUSION: MRCP cannot differentiate irregular narrowing of the main pancreatic duct seen with AIP from stenosis of the main pancreatic duct seen with pancreatic carcinoma. However, MRCP findings in conjunction with MR imaging of pancreatic enlargement that shows abnormal signal intensity on T1- and T2-weighted MR images are useful in supporting a diagnosis of AIP.

Autoimmune Diseases↗
PubMed2004

DDW Report 2004 New Orleans: Capsule Endoscopy.

Capsule endoscopy (CE) is still of considerable interest and, as in recent years, a large number of abstracts have been devoted to CE in various possible indications. As with the other reports, only the most relevant studies and those covering special and new aspects are discussed in detail here. The remaining abstracts feature in the tables and in the reference list. Push enteroscopy (PE) is still the method of choice with which CE has to be compared, but double-balloon enteroscopy is emerging as another interesting alternative or complementary method.

Abdominal Pain↗
PubMed2005

Study of a temporal bone of Homo heildelbergensis.

CONCLUSIONS: The characteristic features of the Hh specimen conformed to those of other Pleistocene human fossils, indicating strong cranial structures and a heavy mandible. The mastoid was large and suggested a powerful sternocleidomastoid muscle. The inner ear and tympanic cavities were similar in size and orientation, suggesting that their functions were probably similar. Our observations suggest that the left ear of this Hh specimen was healthy. The large canaliculo-fenestral angle confirms that this ancestor was bipedal. It also strongly suggests that Hh individuals were predisposed to develop certain pathologies of the labyrinth capsule associated with bipedalism, in particular otosclerosis. OBJECTIVE: We studied a temporal bone of Homo heidelbergensis (Hh) in order to investigate the clinical and physiological implications of certain morphological features, especially those associated with the evolutionary reorganization of the inner ear. MATERIAL AND METHODS: The bone, found in a breach of a cave near MAáaga in southern Spain, together with Middle Upper Pleistocene faunal remains, is >300000 years old. Four analytical methods were employed. A 3D high-resolution surface laser scan was used for anatomical measurements. For the sectional analysis of the middle and inner ears of Hh we used high-resolution CT, simultaneously studying a normal temporal bone from Homo sapiens sapiens (Hss). To study the middle and inner ear spaces we used 3D reconstruction CT preceded by an intra-bone air shielding technique. To examine the tympanic cavities and measure the canaliculo fenestral angle, we used a special minimally invasive endoscopic procedure. RESULTS: The surface, sectional and 3D CT examinations showed that the Hh specimen was generally more robust and larger than the Hss specimen. It had a large glenoid fossa. The external meatus was wide and deep. The middle ear, and especially the mastoid, was large and widely pneumatized. There were no appreciable differences in the position and size of the labyrinthine spaces and tympanic cavity. The dimensions of the semicircular canals were similar to those of the Hss specimen. Endoscopy revealed normal, healthy tympanic walls and an ossicle fragment in the atticum that probably belonged to the body of the malleus. The diameters of the fallopian duct and the tympanic opening of the Eustachian tube were large. The canaliculo-fenestral angle was approximately 114 degrees

Animals↗
PubMed2006

Macroscopic appearance of intestinal angiodysplasias under antiangiogenic treatment with thalidomide.

BACKGROUND AND STUDY AIMS: Angiodysplasias are the main cause of bleeding from the small intestine. Single lesions may be treated by endoscopic coagulation or surgical resection. However, multiple disseminated angiodysplasias are frequently present, making local therapy an unfavorable choice or impossible. Currently there is no established medical treatment available for these patients. Thalidomide is a potent inhibitor of angiogenesis in experimental models. As angiodysplasias are a result of unregulated vessel growth, antiangiogenic treatment may inhibit growth of angiodysplasias. PATIENTS AND METHODS: We studied the effect of thalidomide on the macroscopic appearance of angiodysplasias in three patients with bleeding due to multiple angiodysplasias of the small intestine. During the previous 12 months patients had experienced 3 - 7 bleeding episodes and had received a mean of 16.7 blood units. RESULTS: After start of treatment with thalidomide at a dose of 100 mg daily, no further bleeding episodes occurred. Although thalidomide was stopped after 3 months, bleeding did not recur and hemoglobin reached and maintained normal levels without further transfusions for the whole observation period (mean follow-up 34 months). Repeat wireless capsule endoscopy after 3 months' thalidomide demonstrated substantial reductions in the number, size, and color intensity of angiodysplasias. CONCLUSION: Thalidomide seems to inhibit growth of intestinal angiodysplasias and may be useful for treatment of patients with bleeding related to angiodysplasias. Wireless capsule endoscopy allows monitoring of the macroscopic effects of antiangiogenic therapy.

Aged↗
PubMed2002

Role of capsule endoscopy in the management of patients with obscure gastrointestinal bleeding.

The recent emergence of capsule endoscopy has entailed a relevant diagnostic imaging advance for gastrointestinal conditions, especially those involving the small bowel. Gastrointestinal haemorrhage of obscure origin is probably the most widely accepted indication for this new technique, and promising results have been reported from series extant to date. In view of data available on this new modality, and looking forward to having wide, well designed studies fr corroboration, this paper suggests a tentative algorithm for the management of this patient group.

Algorithms↗
PubMed2006

Bioavailability of riboflavin from a gastric retention formulation.

A gastric retention formulation (GRF) made of naturally occurring carbohydrate polymers and containing riboflavin was tested in vitro for swelling and dissolution characteristics as well as in fasting dogs for gastric retention. The bioavailability of riboflavin, a drug with a limited absorption site in the upper small intestine, from the GRF was studied in fasted healthy humans and compared to an immediate release formulation. It was found that when the GRF is dried and immersed in gastric juice it swells rapidly and releases its drug content in a zero-order fashion for a period of 24 h. In vivo studies in dogs showed that a rectangular shaped GRF stayed in the stomach of fasted dogs for more than 9 h, then disintegrated and reached the colon in 24 h. Endoscopic studies in dogs showed that the GRF hydrates and swells back to about 75% of its original size in 30 min. These in vivo results correlated with in vitro results. Pharmacokinetic parameters determined from urinary excretion data from six human subjects under fasting conditions showed that bioavailability depended on the size of the GRF. The biostudy indicated that bioavailability of riboflavin from a large size GRF was more than triple that measured after administration of an immediate release formulation. Deconvolved input functions from biostudy data suggest that the large size GRF stayed in the stomach for about 15 h.

Animals↗
PubMed1992

The intestinoprostatic capsule anastomosis: functional and anatomic results in a canine model.

Because of its potential application to intestinal bladder reconstructions, the authors studied the functional and anatomic results of a modification of the Camey procedure. In this modification the enteric bladder replacement is sutured to the periphery of the prostatic capsule after the inner two-thirds of the prostate gland have been removed. In eight dogs postoperative functional studies revealed that all were continent and potent. Autopsy examination of the area of the intestinoprostatic anastomosis revealed that the prostatic fossa was lined by a transitional epithelial layer originating from the urethral stump and not by intestinal mucosa as might be expected. The results indicated that this modification is simpler technically than the original procedure, that it shortens the operating time and that it gives excellent functional results. If used in the context of bladder cancer, however, the procedure should be undertaken only in the presence of negative biopsies and brushings of the urethra before surgery, because the transitional epithelium lining the prostatic fossa represents a new area at risk later malignant transformation. Moreover, because of the potential importance of the area of prostatic fossa resurfaced postoperatively by urothelium, even patients with normal preoperative urethral biopsies and brushings who undergo such a procedure require careful follow-up with endoscopic examination, urethral biopsy and brushings and cytologic examination of the urine.

Anastomosis, Surgical↗
PubMed1998

Vitrectomy with endoscopy for management of retained lens fragments and/or posteriorly dislocated intraocular lens.

PURPOSE: To evaluate the advantages of vitrectomy combined with endoscopy for the management of retained lens fragments and/or posteriorly dislocated intraocular lens (IOL). METHODS: A consecutive series of 30 eyes with these complications treated by this technique was reviewed retrospectively. An endoscopic probe which incorporates a video channel, a fibreoptic light source, and a diode laser was used for visualization. Lens material or the IOL was extracted through the corneal wound in 18 eyes (60%). They were either aspired or grasped or lifted using perfluorocarbon liquids (PFCL), under endoscopic control. In 9 eyes (30%) pars plana phakoemulsification was performed. PFCL was used in 11 eyes (36.6%). In 16 eyes (53.3%) an IOL was sutured in the ciliary sulcus. RESULTS: Final visual acuity was > or = 20/40 in 19 eyes (63.3%), > or = 20/30 in 15 eyes (50%). Intraoperative breaks occurred early in the series in two eyes (in one case from use of the endoprobe, in the other from pars plana phakoemulsification). Poor final acuity was related to proliferative vitreoretinopathy, which developed in both cases with an intraoperative iatrogenic retinal break, senile macular degeneration, myopia and amblyopia, cystoid macular oedema, corneal oedema and high astigmatism. CONCLUSION: We found that endoscopy facilitated the management of these complications of cataract surgery once the peculiar difficulties of the technique (absence of stereoscopy, manipulation of the endoprobe, video monitor control) were mastered. Endoscopy facilitated and shortened localization of lens fragments embedded into the vitreous base for aspiration, grasping and phakoemulsification, enabled detection of small anterior retinal breaks, permitted resection of adhesions between anterior hyaloid, lens capsule and ciliary sulcus and facilitated PFCL manipulations, whatever the status of the anterior segment (corneal edema, myosis, synechiae, presence of IOL).

Aged↗
PubMed1996

The antero-inferior (transmuscular) approach for arthroscopic repair of the Bankart lesion: an anatomic and clinical study.

In order to find a direct approach to the antero-inferior third of the glenoid rim, an anatomic study was performed on a total of 89 shoulders (48 cadavers). To obtain defined reference points for the anterior inferior third of the glenoid cavity, it was compared with the hour markings on a clock face. The 4:30 position on the right shoulder and the 7:30 position on the left shoulder were defined as the relevant reference points. The average distance between the palpable end of the coracoid process and the 4:30 and 7:30 positions was 19 mm. The average distance to the point of intersection of the musculocutaneous nerve with the medial margin of the conjoined tendon was more than 5 cm, and was never less than 2 cm. The average distance of the axillary nerve from the 4:30 position was 2.5 cm in the horizontal plane, with a minimum of 1.5 cm. Radially, the average distance of the axillary nerve was 1.7 cm, with a minimum of 1.3 cm. The anatomic study was followed by a clinical study of 264 patients. An antero-inferior portal located maximum 2 cm distal from the palpable coracoid tip was selected for the introduction of a trocar sheath and blunt trocar, passing through the subscapularis muscle to access the antero-inferior area of the glenoid rim. As additional protection for the musculocutaneous nerve, the direction of the trocar was adjusted during introduction. Reattachment of the labrum-capsule complex was performed extra-articularly. In all cases, at least one implant was located inferior to the 4:30 or 7:30 position. No neurovascular complications arose out of the choice of portal. Out of the 264 patients, the first 100 shoulders (98 patients) were followed-up after an average time of 35 months (18 to 62 months). The recurrence rate was 9%. Excluding the first 30 shoulders (30 patients) from the development phase of the technique, the recurrence rate is only 5.7%. The rate of return to overhead sports activities was 62% and to collision sports activities 70%.

Adult↗