Comparison of the findings of triple-injection cinearthrography of the wrist with those of arthroscopy.

Fifty consecutive patients who had a history and clinical findings consistent with internal derangement of the wrist were prospectively entered into a study to compare the findings of triple-injection arthrography with those of arthroscopy of the wrist with use of three portals. Twenty-six patients were men, and twenty-four were women. They had an average age of thirty-six years (range, eighteen to seventy years). The average duration of symptoms in the wrist was eight months (range, one to twenty-four months). The arthrograms of the wrist, which included cineradiographs, were all made and evaluated by the same radiologist. The arthroscopic evaluation of the wrists was performed by two hand surgeons who had previous knowledge of the arthrographic findings. The abnormal findings included in this study were limited to those that should be detectable with both arthrography and arthroscopy. These were full-thickness tears of the scapholunate ligament, the lunotriquetral ligament and the triangular fibrocartilage. The findings of arthrography were normal in eighteen wrists, demonstrated a single lesion in twenty-one, and demonstrated multiple lesions in eleven. Twelve wrists were noted to have a tear of the scapholunate ligament; fifteen, a tear of the lunotriquetral ligament; and eighteen, a tear of the triangular fibrocartilage. The arthroscopic findings were normal in six wrists, demonstrated a single lesion in twenty-five, and demonstrated multiple lesions in nineteen. Twenty-two wrists were noted to have a tear of the scapholunate ligament; fifteen, a tear of the lunotriquetral ligament; and thirty, a tear of the triangular fibrocartilage. When compared with arthroscopy of the wrist, the sensitivity, specificity, and accuracy of triple-injection cinearthrography in detecting tears of the scapholunate ligament, lunotriquetral ligament, and triangular fibrocartilage, as a group, were 56, 83,and 60 per cent. Although arthrography of the wrist is a well accepted diagnostic modality in the evaluation of pain in the wrist, this study suggests that normal arthrographic findings do not necessarily rule out the possibility of internal derangement of the wrist.

Percutaneous alternatives in nutritional support: a radiologic perspective.

As alternatives to per os feeding and nutritional support increase in number and complexity, the interventional radiologist has come to play a more significant role in the creation and maintenance of nutritional access. In very difficult access cases, the concerted effort of the nutritional surgeon and the radiologist is often required. We describe several such situations which have been successfully managed at our institution. The indications for and techniques of percutaneous reestablishment of surgically placed jejunostomy tubes, the percutaneous conversion of gastrostomy to jejunostomy tubes with retention of the gastrostomy tube, and percutaneous placement of an inferior vena caval Hickman catheter are all described in detail.

Tc-99m MDP uptake in osteopoikilosis.

A Tc-99m bone scan of a patient with classic roentgenographic findings of osteopoikilosis revealed multiple foci of increased activity that corresponded to many of the sclerotic foci on the roentgenograms. The authors presume that the abnormal bone scan in this patient reflects active osseous remodeling, similar to what has been observed in bone islands. Previous reports have emphasized the critical role of the radionuclide bone scan for distinguishing osteopoikilosis from osteoblastic bone metastases in patients with a known or suspected primary malignancy. In a young patient, an abnormal bone scan does not exclude the diagnosis of osteopoikilosis if the roentgenographic findings are characteristic of that entity.

[Polythelia as a sign of other congenital malformations: a clinical example]. / La politelia come spia di altre malformazioni congenite: un esempio clinico.

The authors describe the clinical history of a girl with severe chronic constipation due to anterior ectopic anus, associated with supernumerary nipples. The authors underline the importance of possible associations between supernumerary nipples and other congenital anomalies.

The Brookhaven National Laboratory electron beam ion source for RHIC.

As part of a new heavy ion preinjector that will supply beams for the Relativistic Heavy Ion Collider and the National Aeronautics and Space Administration Space Radiation Laboratory, construction of a new electron beam ion source (EBIS) is now being completed. This source, based on the successful prototype Brookhaven National Laboratory Test EBIS, is designed to produce milliampere level currents of all ion species, with q/m=(1/6)-(1/2). Among the major components of this source are a 5 T, 2-m-long, 204 mm diameter warm bore superconducting solenoid, an electron gun designed to operate at a nominal current of 10 A, and an electron collector designed to dissipate approximately 300 kW of peak power. Careful attention has been paid to the design of the vacuum system, since a pressure of 10(-10) Torr is required in the trap region. The source includes several differential pumping stages, the trap can be baked to 400 C, and there are non-evaporable getter strips in the trap region. Power supplies include a 15 A, 15 kV electron collector power supply, and fast switchable power supplies for most of the 16 electrodes used for varying the trap potential distribution for ion injection, confinement, and extraction. The EBIS source and all EBIS power supplies sit on an isolated platform, which is pulsed up to a maximum of 100 kV during ion extraction. The EBIS is now fully assembled, and operation will be beginning following final vacuum and power supply tests. Details of the EBIS components are presented.

Percutaneous abscess and fluid drainage: a critical review.

Pertinent radiologic and surgical literature regarding abscess drainage was reviewed. Noted is the heterogeneity of disorders categorized as abscesses, and the variety of therapeutic approaches presently available. Specific abscesses are discussed based on body location and/or associated organ system.

Treatment of biliary leaks and fistulae by simultaneous percutaneous drainage and diversion.

Although biliary fistulae and bilomas are often adequately managed with percutaneous drainage, persistent bile duct leaks are difficult to control. The primary surgical goal in this situation is to decompress the biliary system through diversion of bile flow to facilitate healing of the defect in the bile ducts. We report 3 patients with large biliary duct defects who underwent percutaneous transhepatic cholangiography which demonstrated the site of the biliary leakage. Then, extrapolating the aforementioned surgical tenet to these patients, all 3 were successfully treated with interventional radiologic techniques: simultaneous percutaneous transhepatic biliary diversion to control biliary flow and percutaneous biloma drainage to facilitate closure of the cavity.

Perforation of the common bile duct during endoscopic sphincterotomy: recognition on computed tomography and successful percutaneous treatment.

Retroperitoneal common bile duct (CBD) perforation is a rare complication of endoscopic retrograde cholangiopancreatography (ERCP). We describe such a case with delayed diagnosis made by computed tomography (CT) and successful percutaneous management of the injury.

Percutaneous management of abscesses that involve native arteries or synthetic arterial grafts.

Retrospective analysis of 250 cases in which abscess drainage was performed revealed four abscesses in four patients that were associated with either underlying infected synthetic arterial bypass grafts (n = 3) or an underlying infected native artery (n = 1). Percutaneous drainage of the abscess coupled with intravenous antibiotic therapy resulted in palliation in three patients and possible long-term cure in one patient. No catheter-related complications resulted. In two patients, preoperative abscess sterilization allowed the substitution of alternative revascularization procedures of decreased morbidity and technical complexity. On rare occasions, when emergent surgery is absolutely contraindicated in the setting of graft or arterial infection, percutaneous drainage may play a role in palliative therapy.

Vertebral mineral status: assessment with single- versus multi-section CT.

A volumetric approach to quantitative single-energy computed tomography (CT) of the spine for trabecular bone evaluation was compared with the accepted single-section method in 32 thoracic and lumbar vertebral bodies from six cadaveric specimens. Both 5-mm and 10-mm contiguous section sequences afforded greater sample volumes, mean mineral equivalent values, and precision than did the single midplane section technique. These findings can be explained by inhomogeneous trabecular distribution, differential bone resorption rates for various cancellous regions, and nonuniform deposition of marrow fat. Scoliosis may modify the net influence of these factors owing to altered biomechanical forces. Although the single-section method affords optimal sensitivity to early or subtle alterations in vertebral trabecular bone density, it may misrepresent the status of the total cancellous volume. Because three-dimensional histographic analysis includes structurally important peripheral trabeculae in determinations of mean mineral equivalent values, it may more accurately reflect vertebral body strength and risk of compression fracture.

Extensive thromboembolic disease of the hand and forearm: treatment with thrombolytic therapy.

Six patients with extensive hand and forearm thromboembolic disease were treated by means of intraarterial infusion of urokinase, with good clinical results. Four significant complications occurred, including a possible stroke. Embolization of pericatheter thrombus was a possible etiologic factor in this case. Antegrade brachial artery puncture should be used in the setting of prolonged upper extremity thrombolytic therapy to avoid the cerebral vasculature. Thrombolysis is an effective technique for tissue salvage in cases of inoperable hand thrombosis.

Percutaneous drainage of hepatic abscesses: comparison of results in abscesses with and without intrahepatic biliary communication.

Results of percutaneous drainage performed in eight patients with eight liver abscesses with intrahepatic biliary communication and 22 patients with 26 liver abscesses without biliary communication were analyzed to determine whether the presence of an intrahepatic biliary communication affected the outcome of treatment. The clinical features and response to treatment of both groups were compared. The presence or absence of biliary communication was determined by injection of contrast material into the abscess under fluoroscopic guidance either during or several days after initial drainage. Duration of drainage was longer (p less than .05) in patients with communication (range, 7-44 days; mean, 22 days) than in patients without communication (range, 1-33 days; mean, 13 days). Percutaneous drainage was curative in five (63%) and palliative or temporizing in one (13%) of eight patients with communication. It was curative in 15 (68%) and palliative or temporizing in five (23%) of 22 patients without communication (p = .317). Liver abscesses with intrahepatic biliary communication did not require percutaneous transhepatic biliary diversion for cure. Despite longer duration of drainage for abscesses with intrahepatic biliary communication, the cure rates of percutaneous drainage for both groups were similar. Patients in whom an intrahepatic biliary communication was shown did not require alternative interventional or surgical measures for cure.

Long bone surface osteomas: imaging features that may help avoid unnecessary biopsies.

OBJECTIVE: Our purpose is to show that a combination of imaging techniques and periodic radiologic follow-up offers an alternative to biopsy in certain patients with long bone surface osteomas. CONCLUSION: Asymptomatic lesions that are consistent with osteoma on a combination of imaging studies can be followed up clinically and radiographically, allowing patients to avoid unnecessary biopsies.

Percutaneous drainage of 335 consecutive abscesses: results of primary drainage with 1-year follow-up.

Retrospective review of percutaneous abscess drainage (PAD) of 335 abscesses in 323 consecutive patients was undertaken. Particular attention was directed to body location, associated organ system, communications and fistulae, and to the underlying immunologic status of the patient. One-year follow-up was available in all patients. Overall, the cure rate was 62.4% (209 of 335 abscesses), with a failure rate of 8.95% (30 of 335 abscesses). There were 14.2% (46 of 323 patients) deaths in the follow-up period, of which 4.6% (15 of 323 patients) were believed attributable to sepsis or septic complications. The overall complication rate was 9.8% (33 of 335 abscesses), most of which were minor in nature. For the patient exhibiting immunocompromise, representing 53.1% (172 of 323 patients) of the patient population, the cure rate was 53.4% (95 of 178 abscesses), which was significantly lower than the cure rate of 72.6% (114 of 157 abscesses) for the immunocompetent patient population (n = 151) (P less than .001). The recurrence rate was 2.1% (seven of 335 abscesses), with all recurrences within 3 months of initial drainage. PAD is effective and permanent treatment for both immunocompromised and immunocompetent patients.

C-peptide response to arginine stimulation in diabetic children.

The extent and the clinical significance of residual beta cell function has been evaluated by radioimmunoassay of C-peptide in 41 diabetic children in different stages of evolution, using an arginine tolerance test. In control subjects a significant rise of C-peptide levels occurred after the infusion with arginine. In patients at the onset of the disease and in patients not in the remission stage, C-peptide levels showed no increment and basal values were significantly lower than in healthy control children. Children during the remission phase showed basal and peak values not significantly different from controls. A positive correlation was found between highest CPR levels compared to basal CPR values and to the age at onset of diabetes; a negative correlation was found between the duration of the disease and insulin requirement.

Percutaneous drainage of renal and perirenal abscesses: results in 30 patients.

The purpose of this study was to determine the efficacy of percutaneous drainage of renal and perirenal abscesses. Thirty-two abscesses, 10 renal and 22 renal with perirenal extension, in 30 patients (16 female, 14 male; age range, 5-83 years), were drained percutaneously. Twenty-one patients had had surgery recently and/or were immunosuppressed. Ten of the 13 postoperative patients had had surgical procedures involving the urinary tract. Size of the abscesses ranged from 10 to 650 ml, and all were drained via CT or fluoroscopic guidance. The type of drainage catheter used depended on the size of the abscess. Complications were unusual. A transient febrile episode without sequelae within the first 12 hr of catheter placement was the most common complication. All patients had their abscess catheter placed while in the hospital; 12 (40%) subsequently were followed up (2-50 days) as outpatients until their catheters were removed without complications. Percutaneous drainage alone was curative in 20 patients (67%) as determined by resolution of signs and symptoms or follow-up CT. Eight (27%) had improvement of signs and symptoms but required surgery to remove tumor (one patient) or a poorly functioning or nonfunctioning kidney (five patients), perform open pyelolithotomy (one patient), or drain a loculated abscess (one patient); all eventually were cured. Three patients (10%) with multiple medical problems died before resolution could be documented, although death was not thought to be directly related to failure of therapy. Our results indicate that percutaneous drainage alone is curative in the majority of cases of renal and perirenal abscesses. Many patients can be treated safely, in part, on an outpatient basis.

Radiographically guided percutaneous catheter drainage of pleural fluid collections.

We reviewed the outcome of guided percutaneous catheter drainage of pleural fluid collections in 18 patients over a 5-year period. Catheter positioning was guided by fluoroscopy in 10 (56%) cases, CT in seven (39%), and sonography in one (6%). Included were 16 patients with empyemas and one each with a sterile hematoma and transudate. In nine of the patients, previous surgical chest tube drainage had been unsuccessful. The majority of collections were treated with a 12- or 14-French catheter and closed underwater seal drainage. Twelve (80%) of the 15 patients who had an adequate trial of guided drainage were cured. Propyliodone oil suspension contrast sinography after catheter placement showed two clinically unsuspected bronchopleural fistulas. Although an extensive multilocular pleural collection was a contraindication to percutaneous catheter drainage, the thick fibrous peel of a chronic empyema was not. Drainage of pleural fluid collections with radiographic guidance ensures proper catheter placement and is successful in a high percentage of cases.

Percutaneous drainage of abscesses in patients with Crohn disease.

Up to one-quarter of patients with Crohn disease present with abdominal abscesses at some point in their illnesses, most of which have enteric communication. The efficacy of percutaneous drainage alone vs either a combined percutaneous/surgical approach or a purely surgical approach has not been established. We reviewed the results of percutaneous drainage of nine abscesses in eight patients with Crohn disease. Six of these abscesses communicated with the intestine. Those with enteric communication had temporary palliation, with improved medical status. However, all patients required definitive surgery within 7 weeks of initial drainage. Percutaneous drainage in the three patients without enteric communication resulted in a permanent cure. Our experience with this small series suggests that abscesses that have an enteric communication in patients with Crohn disease can be temporarily palliated by percutaneous drainage. However, use of this technique is unlikely to result in long-term palliation or cure. It appears that abscesses with intestinal communication in Crohn patients can be cured by percutaneous therapy alone.

Postoperative abscesses with enteric communication: percutaneous treatment.

Patients with abscesses that have enteric communication in the absence of underlying inflammatory bowel disease require modification of the usual percutaneous treatment techniques. An ongoing source of output (gastrointestinal secretions) is a complicating factor in treatment. The results of percutaneous treatment of 17 abscesses with enteric communication in 16 patients without a history of inflammatory bowel disease were reviewed. The long-term cure rate was 71%. Pancreatic involvement in abscess-bowel communication diminished the cure rate to 50% (two of four) and lengthened the duration of drainage required. The results suggest that percutaneous treatment of abscesses with enteric communication is a viable alternative to surgical intervention. Minimal morbidity and no mortality were directly attributable to percutaneous therapy in this series. When the pancreas is involved in the establishment or persistence of the abscess-bowel communication, or when the underlying bowel is diseased, the rate of success decreases.