Clinical and serological characteristics of progressive facial hemiatrophy: A case series of 12 patients

BACKGROUND

Progressive facial hemiatrophy (PFH) is characterized by a slowly progressive atrophy of soft tissues and in some cases bony structures. Coexisting features of localized scleroderma (LS) are commonly observed, indicating the close nature of both disorders.

OBJECTIVE

We sought to investigate clinical, serological, and radiographic findings in PFH from 278 patients with LS and to discuss the relationship to linear scleroderma en coup de sabre (LSCS).

METHOD

A total of 12 patients with PFH were retrospectively evaluated on the basis of clinical, serological, and radiographic findings.

RESULTS

Five patients (42%) presented with complete PFH, and 7 patients (58%) with partial PFH involving either cheek or forehead. Five of the patients (42%) had a coexisting LSCS lesion, and 3 of them (25%) had concomitant LS of the trunk. Intraoral involvement was present in 6 cases. Neurological involvement was common, in particular, epileptic seizures. Serologic investigations showed neither evidence for infection with Borrelia burgdorferi nor any other indication of underlying systemic immunological disorders.

LIMITATIONS

There were a relatively small number of patients in a retrospective study.

CONCLUSION

The reported cases suggest a close relationship between PFH and LSCS. PFH might appear as two different subtypes, one involving cutaneous structures and presenting with clinical features similar to LSCS, one being strictly restricted to subcutaneous structures, primarily affecting the cheek area. The manifold clinical features of central nervous system involvement indicate the pathogenetic importance of neurological involvement in the development of PFH. Magnetic resonance imaging should be included in the tools of standard diagnostic procedures in patients with PFH. The etiologic relevance of autoimmunity as well as preceding trauma should be investigated in larger collective studies.

Effective dose of CT- and fluoroscopy-guided perineural/epidural injections of the lumbar spine: a comparative study

The objective of this study was to compare the effective radiation dose of perineural and epidural injections of the lumbar spine under computed tomography (CT) or fluoroscopic guidance with respect to dose-reduced protocols. We assessed the radiation dose with an Alderson Rando phantom at the lumbar segment L4/5 using 29 thermoluminescence dosimeters. Based on our clinical experience, 4-10 CT scans and 1-min fluoroscopy are appropriate. Effective doses were calculated for CT for a routine lumbar spine protocol and for maximum dose reduction; as well as for fluoroscopy in a continuous and a pulsed mode (3-15 pulses/s). Effective doses under CT guidance were 1.51 mSv for 4 scans and 3.53 mSv for 10 scans using a standard protocol and 0.22 mSv and 0.43 mSv for the low-dose protocol. In continuous mode, the effective doses ranged from 0.43 to 1.25 mSv for 1-3 min of fluoroscopy. Using 1 min of pulsed fluoroscopy, the effective dose was less than 0.1 mSv for 3 pulses/s. A consequent low-dose CT protocol reduces the effective dose compared to a standard lumbar spine protocol by more than 85%. The latter dose might be expected when applying about 1 min of continuous fluoroscopy for guidance. A pulsed mode further reduces the effective dose of fluoroscopy by 80-90%.

Imaging of Infected Total Arthroplasty With Tc-99m-labeled Antigranulocyte Antibody Fab′ Fragments

OBJECTIVE

The objective of this study was to evaluate the diagnostic accuracy of Tc-99m-labeled antigranulocyte antibody Fab' fragments in infected total arthroplasty.

MATERIALS AND METHODS

A total of 38 immunoscintigrams were evaluated retrospectively with 15 to 25 mCi Tc-99m-labeled antigranulocyte antibody-Fab' fragments. The final diagnosis was assessed by articular puncture or intraoperative sampling.

RESULTS

In the total hip replacement group the authors found 10 true positives, 7 true negatives, 8 false positives, and 1 false negative; and in the total knee replacement group they found 4 true positives, 8 true negatives, and no false positives or false negatives. They also found a sensitivity of 93%, a specificity of 65%, and a positive predictive accuracy of 63%. There was a negative predictive accuracy of 94%.

CONCLUSION

The high negative predictive accuracy in the whole group suggests that the scan can be used to exclude infection in most cases. Negative results with a high clinical suspicion merits further investigation. A positive result will require further correlative imaging, especially for total knee replacement.

Standard-protocol moving-table magnetic resonance angiography for planning of interventional procedures in patients with peripheral vascular occlusive disease

PURPOSE

This study aimed to evaluate the usefulness of magnetic resonance angiography (MRA) for the planning of interventional procedures in the lower extremity vascular territory.

MATERIALS AND METHODS

Patients with peripheral vascular occlusive disease (PVOD) underwent MRA for planning of percutaneous interventional treatment. Digital subtraction angiography was performed in patients scheduled for interventional treatment and served as the standard of reference.

RESULTS

In 148 out of 150 cases (98.7%), the necessity for an intervention was recognized correctly; 137 out of 150 interventions (91.3%) were correctly planned based on MRA results.

CONCLUSION

Contrast-enhanced MRA of the lower extremities is a safe, noninvasive tool for preinterventional assessment of patients with PVOD. It allows exact planning of endovascular interventions.

Direkte MR-Arthrographie des Schultergelenks mit maximaler Kapseldistension zur OP-Planung

PURPOSE

To evaluate the effectiveness of direct MR arthrography of the glenohumeral joint with maximum distension of the joint capsule in patients with glenohumeral instability for preoperative diagnosis and for determining the method of surgical intervention.

MATERIALS AND METHODS

MR arthrography of the shoulder joint was performed on a 1.5 T system in 38 patients. All patients suffered from anterior or bidirectional instability. Using a fluoroscopically guided posterior approach, a 1 % dilution of dimeglumine gadopentetate (5 mmol Gd-DTPA/l) was injected until full capsular stretching was achieved. MR imaging protocol included fat-saturated transversal, oblique-coronal and oblique-sagittal T1-weighted spin-echo, T1-weighted 3-D and transversal T2-weighted Flash-2D.

RESULTS

MR imaging revealed significant capsule distention in 22 patients and ventral capsule defects in 9 patients. Labral lesions were depicted in 25 patients, bicipital tendon lesions in 4 patients and partial ruptures of the rotator cuff in 3 patients. 15 of the 38 patients underwent surgery. Areas of pathologic laxity of the glenohumeral capsule were correctly described in all cases. In 12 of 15 patients, the best method of intervention could be determined prospectively. In 3 of 15 patients, the necessary operation was overestimated. Regarding labral ruptures, MRI had a sensitivity of 88 %, a specificity of 86 %, and a diagnostic accuracy of 87 %.

CONCLUSION

Direct glenohumeral MR arthrography allows accurate preoperative evaluation of labral and tendinous structures. Judging the capsular laxity allows the determination of the optimal method of surgical intervention. The maximum extent of a stabilizing operation can be predicted preoperatively.

Magnetic resonance imaging of the lumbar spine after epidural and nerve root injection therapy: evaluation of soft tissue changes

OBJECTIVE

Magnetic resonance imaging (MRI) was performed to evaluate soft tissue changes after nerve root and epidural injections in lumbar spine in patients with radiculopathy.

MATERIALS/METHODS

Patients underwent a multiple-shot injection protocol to nerve root/epidural space. The MRI protocol included T1-weighted, T2-weighted, STIR, and contrast-enhanced, fat-saturated T1-weighted sequences before and after treatment.

RESULTS

In all treated patients, a diffuse wedge-shaped edema in paravertebral tissues with a slight contrast enhancement was seen. Two small hematomas in the paravertebral muscle were noted. No changes in the epidural space, the abscess, or a lipodystrophy in epidural/nerve root space occurred.

CONCLUSION

Normal tissue changes after injection therapy of lumbar radiculopathy include wedge-shaped tissue edema at the injection level. In a minority of patients, small hematomas may occur.