Rush A. Youngberg

Occult fractures of the femoral neck.

Occult fractures of the femoral neck can be subtle or even undetectable on plain radiographs. Yet, untreated, the morbidity of this fracture significantly increases. This report discusses the clinical and radiologic findings seen in occult fractures of the femoral neck. It also discusses the role of tomograms, bone scan, computed tomography, and magnetic resonance imaging in further delineating this entity.

MRI of giant cell tumor of the tendon sheath in the cervical spine

The authors present a case of giant cell tumor of the tendon sheath (GCTTS) in the cervical spine, not previously described in the radiologic literature. Diagnostic imaging includes plain film radiographs, bone scintigraphy, CT, and MRI. Only one case of tenosynovial giant cell tumor of the cervical spine has been reported. The radiological features of this tumor are described along with a brief review of GCTTS.

Synovial chondromatosis simulating neoplastic degeneration of osteochondroma: findings on MRI and CT.

A case is presented of synovial chondromatosis within a bursal sac overlying an osteochondroma in a patient with osteochondromatosis. This condition presented with a symptomatic soft tissue mass containing calcified bodies. It can be mistaken clinically and radiographically for malignant degeneration of an osteocondroma with development of chondrosarcoma. Magnetic resonance findings have not previously been described in this entity and proved helpful in the preoperative diagnosis. Magnetic resonance imaging was also helpful in defining the extent of the lesion. Ultrasound and other imaging modalities are also discussed, including the pathologic basis for the radiographic findings.

Cystic hygroma of the arm: a case report and review of the literature.

Abstract Cystic hygromas arising outside of the cervicofacial, thoracic, and abdominal areas are extremely rare. Detailed descriptions of this lesion, along with its MRI findings, in the extremities are lacking in the literature. The following case report describes such a lesion occurring in the arm.

Cine MRI of the TMJ: need for initial closed mouth images without the Burnett device.

Objective To evaluate the Burnett device when studying functional and morphologic aspects of internal derangements of the temporomandibular joint (TMJ) with cine MRI. Materials and Methods A patient with clicks in the TMJ cycle was studied with dynamic cine MRI both prior to the placement of the Burnett device and with the Burnett device in position. Results Review of MRI revealed clear anterior displacement of the disk in relation to the condylar head in true closed mouth position without the Burnett device in place. Conclusion Closed mouth off-sagittal imaging of the disk in the closed mouth position should be included prior to appliance placement to detect anterior displacements with very early recapture.

Cine MRI in the evaluation of the proplast-teflon TMJ interpositional implant

Proplast-Teflon (Vitek Inc., Houston, TX, U.S.A.) interpositional implants (PTIPIs) have been removed from the market due to complications that include severe bony destruction of both condyle and fossa as a result of exuberant foreign body giant cell reaction. As per Food and Drug Administration recommendations, the radiologist will often be called to evaluate the status of these implants in the large population that received them. We present a case of bilateral PTIPIs with nonreducing anterior displacement of the meniscal prosthesis made more apparent by cine MRI. Extensive granulomatous reaction in the temporal bone exhibited mobility with cine.

MR orthogonal views of the femoral neck: oblique-axial view from the oblique-coronal plane.

The authors describe a simple technique for imaging femoral neck lesions in two orthogonal views. Oblique-coronal imaging was performed in planes parallel to the femoral neck from an axial localizer. Subsequently, oblique-axial imaging was performed perpendicular to the oblique-coronal images. This technique localizes the lesion to either the cortex or the medullary space. Precise location of the femoral neck lesion refines the differential diagnosis and assists the clinicians in therapeutic planning.

Scapholunate dissociation: A practical approach for the emergency physician

Scapholunate dissociation is an injury caused by forced hyperextension of the wrist and results in characteristic radiographic features that may not be apparent on routine x-ray studies. In addition, significant ligamentous damage may be present even with normal radiographs. If misdiagnosed and improperly treated, this injury can lead to chronic wrist pain, instability, and degenerative changes. We present an illustrative case, review the pertinent literature, and present an algorithm for the evaluation and management of scapholunate dissociation.