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Biomedical subjects

R K Chhem

Publications and source records attributed to R K Chhem.

33 records · Page 2Linked to original sources
PubMed1995

Soft-tissue recurrence of osteosarcoma: ultrasound findings.

The authors describe a 26-year-old woman with soft-tissue recurrence of osteosarcoma, which presented as focal soft-tissue swelling after limb salvage surgery and insertion of a metallic endoprosthesis. Because of the clinical presentation, ultrasonography was performed. The characteristic ultrasonographic pattern of soft-tissue tumours is summarized here, and the role and limitations of ultrasonography in this situation are discussed.

Adult↗
PubMed1994

Imaging of soft-tissue sarcomas.

Soft-tissue sarcomas are encountered only infrequently, but their diagnosis is important because the long-term prognosis is usually good if the tumour is properly managed. The role of various imaging modalities in the evaluation of these neoplasms is discussed, with special emphasis on magnetic resonance imaging. The authors review the importance of imaging in tumour detection, characterization, staging and surveillance after therapy, and they emphasize the critical subject of proper biopsy technique.

Humans↗
PubMed1994

Ultrasonography of the musculoskeletal system.

This article reviews the numerous applications of ultrasound in the musculoskeletal system. Emphasis is made on the important and often under-utilized role of ultrasound in infections, vascular lesions, arthritis, and trauma.

Arthritis↗
PubMed1993

Ultrasonography of the ankle and the hindfoot.

High-resolution ultrasonography (US) has proved an excellent noninvasive and inexpensive modality for examining the extremities. This pictorial essay illustrates the US appearance of bony and soft-tissue abnormalities of the ankle and the hindfoot. The role of US as an adjunct technique to complement conventional radiography is stressed. The advantages of US in examining traumatic, inflammatory and infectious lesions and soft-tissue masses are discussed.

Ankle Injuries↗
PubMed1992

Case report: primary mesenchymal chondrosarcoma of the brain.

We report an 11-year-old girl with a very rare tumour, mesenchymal chondrosarcoma of the brain, presenting as a haemorrhagic stroke, in whom angiography originally showed a distal arterial aneurysm. One month later MRI showed a solid tumour in addition to evidence of haemorrhage, and angiography then demonstrated pathological vascularity. The diagnosis was made following craniotomy.

Brain Neoplasms↗
PubMed1992

[Imaging of HIV+ abdominal involvements].

Abdominal symptoms are among the most frequent complaints of patients with AIDS. Because precise diagnosis from symptoms alone is difficult, the contribution of radiologist is important to fill in evaluating the cause of various illnesses. The review describes common clinical symptoms and lists the most likely causes with discussing the most appropriate imaging evaluation. For diagnosis and treatment, the most frequent and characteristics radiographic findings are described.

Acquired Immunodeficiency Syndrome↗
PubMed1992

Ultrasonography of foreign-body tenosynovitis.

A patient presented with cellulitis of the hand 4 weeks after she was injured by sea urchin spines. Ultrasonography proved useful in identifying three small fragments of spine and suggested tenosynovitis. This method should be considered the imaging technique of choice for wounds of the hand when foreign bodies are suspected.

Adult↗
PubMed1992

Ultrasonography of a bone metastasis.

The authors report a case of cortical bone metastasis presenting as a soft-tissue mass in the thigh. Because of the initial clinical presentation, ultrasonography was performed first; plain radiography and a percutaneous biopsy provided additional diagnostic information. The authors describe the ultrasonographic findings and the role of this imaging technique in the final diagnosis of such lesions.

Adult↗
PubMed1989

[Transperineal echography of presacral masses].

We report three patients with presacral lesions, a mucocele, and abscess, and a recurrent rectal adenocarcinoma respectively. The ultrasonographic findings are described with emphasis on the transperineal approach.

Abscess↗
PubMedDate not supplied

Musculoskeletal infections: US manifestations.

One of the most important prognostic factors in patients with musculoskeletal infections is the delay in establishing therapy. Early diagnosis of septic arthritis requires analysis of joint fluid. Ultrasonography (US) is a rapid, portable, sensitive technique for confirming the presence of joint effusions. The study can be easily repeated for follow-up of lesions. US allows real-time guidance of fluid aspiration and can reduce the risk of contaminating other anatomic compartments, especially in the hands, wrists, and feet. Radiography provides complementary information and should be performed in conjunction with US. US is the imaging modality of choice for diagnosis of superficial abscesses. Dynamic compression with the US probe and color Doppler imaging can facilitate detection of superficial abscesses. US may help in the early diagnosis of osteomyelitis by demonstrating subperiosteal or juxtacortical fluid collections and by providing guidance for aspiration of these collections. Evaluation of osseous involvement requires additional imaging; a US examination with normal results does not allow exclusion of bone infection. US is not degraded by metallic artifact and may be useful in cases of osteomyelitis complicating metallic fixation in an extremity. After initial radiography, US can play an important role in the management of musculoskeletal infections.

Abscess↗
PubMedDate not supplied

Physeal injury in a lightning strike survivor.

Electrical injuries resulting in physeal injury in children are an uncommon but well-recognized clinical entity. Almost all these injuries are sustained from man-made electrical sources. To date, there have been no published cases of growth arrest after lightning strike. The authors report the case of a 12-year-old girl who survived a lightning strike 2 years ago and who presented with asymmetric growth arrest in both legs. The authors discuss the pathophysiology of lightning strike and consider the evidence for direct electrical injury versus ischemic insult to the physis as explanations for the cause of the growth arrest observed in this patient.

Child↗
PubMedDate not supplied

[Musculoskeletal ultrasonography of the extremities: clinical applications].

Sonography is a non-invasive and efficient imaging modality for the evaluation of musculoskeletal disorders of the extremities. This technique is still underutilized in the work of these types of lesions. Our goal is to review recent development of this modality and to identify its most common and useful clinical applications.

Arm↗