Search PubMed⌕ Search

Biomedical subjects

D L Resnick

Publications and source records attributed to D L Resnick.

13 recordsLinked to original sources
PubMed1996

Extrasynovial spaces of the cruciate ligaments: anatomy, MR imaging, and diagnostic implications.

OBJECTIVE: The purpose of our study was to define the anatomy of the extrasynovial space that cruciate ligaments occupy by examining the pattern on MR imaging of normal fluid distribution in the joints around the cruciate ligaments and correlating this distribution with histologic analysis of synovial reflections around the cruciate ligaments. MATERIALS AND METHODS: MR images of five cadaveric knees were obtained serially after larger and larger amounts of contrast material were injected into the joint space. The patterns of fluid distribution around cruciate ligaments were noted. In two other cadaveric knees, the synovial sheath around the anterior cruciate ligament was injected directly with contrast material under CT guidance. Anatomic and histologic correlation was made with findings on corresponding MR images. RESULTS: The pattern of fluid distribution is bounded by the synovial reflections around cruciate ligaments. When maximum joint distention is achieved, fluid almost surrounds the cruciate ligaments. The area without fluid is a triangular space between the anterior and posterior cruciate ligaments that appears on the midsagittal image. This triangular space of the cruciate ligaments is an extrasynovial space within which both the anterior cruciate ligament and the posterior cruciate ligament reside. CONCLUSION: The overlying synovial membrane of the cruciate ligaments does not normally allow joint fluid to enter the substance of the ligaments or the triangular space of the cruciate ligaments. Therefore, fluid collections seen on MR imaging in these extrasynovial spaces or structures likely arises from injury to the cruciate ligaments.

Adult↗
PubMed1995

Pigmented villonodular synovitis: MRI characteristics.

The magnetic resonance imaging (MRI) scans of 26 patients with histopathologically proven pigmented villonodular synovitis (PVNS), involving joints but excluding tendon sheaths, were reviewed retrospectively. The purpose of this study is to define the spectrum and frequency of MRI characteristics for PVNS using conventional spin echo (in two cases before and after intravenous administration of gadopentate dimeglumine) and also gradient echo techniques. A cystic variety is presented, the MRI appearances of which have not been found in a review of the literature.

Adolescent↗
PubMed1995

Plantar compartments of the foot: MR appearance in cadavers and diabetic patients.

PURPOSE: To demonstrate the plantar compartments of the foot on magnetic resonance (MR) images. MATERIALS AND METHODS: The plantar compartments of four cadaveric feet underwent MR imaging and were sectioned. Fifteen MR studies in 11 patients with compartmental fluid were evaluated. The epicenter of infection was determined from review of the history, radiographs, and MR images. RESULTS: In the cadaveric feet, distribution of contrast material conformed to the compartmental anatomic features. MR findings in the specimen correlated exactly with gross findings. All seven feet with infection centered at the second through fourth metatarsal heads demonstrated only central compartment fluid. In seven of eight feet with a more medial or lateral epicenter of infection, fluid was seen in the lateral or medial compartment and in the central compartment. In one foot with a lateral epicenter of infection, fluid was confined to the lateral compartment. CONCLUSION: MR imaging accurately depicts the compartmental anatomic features of the foot.

Cadaver↗
PubMed1993

Painful conditions affecting the first metatarsal sesamoid bones.

The sesamoid bones of the first metatarsal exhibit a special anatomic configuration, enveloped by the tendons of the flexor hallucis brevis and lying within the capsule of the first metatarsophalangeal joint. Painful conditions of the hallux sesamoid bones are many and include congenital, traumatic, arthritic, infectious, and ischemic conditions. Because of the complex anatomy and the numerous pain-sensitive structures in the region of the first metatarsophalangeal joint, a differential diagnosis can be challenging. The imaging examination should always begin with conventional radiography, including special axial and lateromedial views of the sesamoid bones. In cases in which results of routine radiography are inconclusive, scintigraphy, conventional or computed tomography, xeroradiography, or magnetic resonance imaging can be used. A thorough understanding of the anatomy; pathophysiology; and clinical, laboratory, and imaging findings is often helpful in the establishment of a diagnosis and management plan for painful conditions of the hallux sesamoid bones.

Adult↗
PubMed1991

Osteonecrosis of the knee after arthroscopic surgery: diagnosis with MR imaging.

Spontaneous osteonecrosis about the knee typically is a disease of the elderly characterized by an acute onset of pain. The exact cause of this condition has long been debated, although a causative relationship between meniscal tears and spontaneous osteonecrosis about the knee has been postulated. Seven patients with knee pain, meniscal tears, and chondromalacia without initial evidence of osteonecrosis at magnetic resonance (MR) imaging underwent arthroscopic surgery with meniscal recontouring or repair and cartilage shaving. These patients returned within 2-14 months with recurrent pain in the treated knee. MR imaging then demonstrated abnormalities consistent with osteonecrosis. Osteonecrosis of the femoral condyle or tibial plateau may be a late sequela of meniscal injury in association with chondromalacia and arthroscopic surgery. This diagnosis should be suspected in patients with recurrent knee pain after arthroscopic repair of meniscal tears. The precise relationship of this pattern of osteonecrosis to that previously described as spontaneous requires further investigation.

Arthroscopy↗
PubMed1987

Sonography of thigh abscess: detection, diagnosis, and drainage.

Sonographic characteristics and percutaneous catheter drainage of thigh abscesses in 18 patients are described. Most of these patients had underlying diseases including osteomyelitis, trauma, diabetes mellitus, rheumatoid arthritis, leukemia, lymphoma, sepsis, bleeding dyscrasia, and autoimmune disease. Previous procedures on these thigh collections included seven operations and 12 nondiagnostic ward aspirations. All collections were shown by sonography to be either anterior or anterolateral. Two cases referred for drainage were posteromedial; sonography showed these to be mycotic pseudoaneurysms. The abscesses were either anechoic or hypoechoic, and occasionally had debris and septations. Abscesses associated with underlying osteomyelitis abutted the femur; those related to other causes generally were more superficial within muscle or fascial layers. Sonographically guided catheter drainage successfully cured all patients, even those in whom ward aspiration or formal surgery had been unsuccessful. Sonography is a simple and inexpensive method of imaging and guiding the drainage of thigh abscesses. Percutaneous catheter drainage is the treatment of choice in cases in which simple emergency room or ward incision and drainage are inadequate.

Abscess↗
PubMed1985

Tarsal coalition.

Explore the source record for details and available documents.

Calcaneus↗
PubMed1982

Fish vertebrae.

Explore the source record for details and available documents.

Bone Diseases↗
PubMed1980

Plasma cell dyscrasia with polyneuropathy, organomegaly, endocrinopathy, M protein, and skin changes: the POEMS syndrome. Report on two cases and a review of the literature.

Two patients with plasma cell dyscrasias, manifested by osteosclerotic bone lesions and small amounts of M protein, and a complicating multi-system disorder are described. Their features of severe sensory-motor polyneuropathy, organomegaly, endocrine dysfunction, anasarca, elevated CSF protein, and skin hyperpigmentation are similar to a clinical syndrome reported primarily in Japanese men. Two previously unrecognized findings--hyperprolactinemia and an unusual radiographic abnormality of fluffy, spiculated bony proliferation--may facilitate recognition of the syndrome. The relationship of these various manifestations to the plasma cell dyscrasia is unknown, but a number of possibilities are discussed.

Adult↗