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Biomedical subjects

Gershon Volpin

Publications and source records attributed to Gershon Volpin.

7 recordsLinked to original sources

Low back pain.

This study attempts to define the validity of radiographic imaging for the diagnosis of low back pain.

Adolescent↗

[Osteoid osteoma of the wrist joint resembling tenosynovitis].

Osteoid osteoma of bones of the wrist joint is a relatively rare lesion. This article presents a series of three patients, one with osteoid osteoma of the styloid process of the radius and two with osteoid osteoma of the capitate bone. All of them had clinical symptoms resembling those of stenosing tenosynovitis of the wrist joint. X-rays, tomography and bone scan revealed the characteristic findings of osteoid osteoma. Histological examination confirmed the diagnosis. Treatment consisted of "en bloc" excision of these tumors. Following surgery patients were asymptomatic and had normal mobility of the affected wrist. In the first patient this has been maintained for the succeeding 27 years. It is suggested that in any case of persistent unexplained pain of the wrist or clinical symptoms resembling those of tenosynovitis, osteoid osteoma of the styloid process of the radius or of the carpal bones should also be included in the differential diagnosis. The recommended treatment of osteoid osteoma is "en bloc" excision of this tumour in the affected bone, resulting in complete relief of pain and absence of functional disturbances.

Bone Neoplasms↗

[Limb fractures in organ transplanted patients].

Patients that have had organ transplantation receive immunosuppressive therapy to prevent organ rejection. Along with this therapy comes a higher incidence of osteoporosis, which may lead to an increased frequency of fractures in post-transplant patients. This article presents three patients who underwent organ transplantation and had subsequent fractures: subcapital fracture of the femoral neck treated with hemiarthroplasty of the hip, in a patient 8 years post cardiac transplantation; minimally displaced intertrochanteric fracture treated by percutaneous pinning, in a patient one year post lung transplantation; minimally displaced subcapital fracture treated by percutaneous pinning, in a patient 3 months post liver transplantation. Each patient was operated upon successfully and without complications. The three patients were able to resume their activities of sitting and walking after only a few days. In our opinion, preventive treatment for osteoporosis is crucial for candidates of solid organ transplantation. This treatment should be initiated prior to surgery and continued after as well. Transplant patients receiving immunosupression therapy with subsequent osteoporotic fractures of the extremities should undergo early surgical intervention in order to enable a short and quick rehabilitation and early return to normal activities of daily living.

Adult↗

Correction of combined angular and rotational deformities by the Ilizarov method.

Deformities of the lower extremities are often a combination of angular and rotational components. The rotational component of combined deformities may be difficult to measure using plain radiography. Based on the current study, the computed tomography rotational malalignment test was developed. Evaluation of lower extremity alignment was done on 56 patients. Rotational malalignment was diagnosed in 14 limbs of nine patients. In all patients, correction of angular and rotational deformities was done simultaneously using an Ilizarov external fixator. The frame included a standard angular distraction system and a derotation block interconnected via an additional empty ring. In all cases, successful correction of angular and rotational deformities was achieved. The pain was eliminated in all seven patients having preexisting chronic joint pain. There were no cases of deep infection or nonunion. This simple and reliable method allowed precise analysis of the deformity in the transverse plane. Preoperative frame construction incorporating the derotational module decreased the time of the operation and allowed one-stage correction of rotational and angular deformities without additional manipulations.

Adolescent↗

Vascularized muscle pedicle flap for osteonecrosis of the femoral head.

Osteonecrosis is a devastating, locally progressive degenerative condition that mainly affects young adults. Osteonecrosis of the femoral head requires biological hip reconstruction. This article describes a technique that uses a vascularized muscle pedicle flap as a viable bone graft for treatment of this condition.

Adult↗

Chromium-induced lymph node histiocytic proliferation after hip replacement. A case report.

BACKGROUND: Prosthetic joint replacement is frequently used for the treatment of degenerative joint disease, rheumatoid arthritis, bone tumors and traumatic lesions. The prostheses contain such materials as titanium, cobalt and chromium. We describe a patient who, after total hip arthroplasty, developed an inguinal-pelvic mass. Fine needle aspiration revealed metallic particles, also seen on light microscopy in reactive pelvic lymph nodes. Ultrastructure was consistent with the presence of foreign particles, while energy dispersive x-ray microanalysis established the presence of chromium. To our knowledge, this is the first report of chromium-related lymph node metallosis diagnosed by fine needle aspiration. CASE: Eight years after total hip arthroplasty, a 78-year-old woman developed a right pelvic cystic mass. Aspiration drainage was performed. Smears from fine needle aspiration showed numerous macrophages with abundant, foamy cytoplasm and round nuclei without atypia. Small, birefringent particles were seen in the cytoplasm. Histopathology showed fibroconnective tissue with chronic inflammation and marked lymph node sinus histiocytosis. Within histiocytes, numerous particles were present, identical to those seen in the smears. Their nature as "foreign bodies" was confirmed by electron microscopy, and the presence of chromium was shown by energy dispersive x-ray analysis. CONCLUSION: Fine needle aspiration and polarized microscopy are excellent techniques to evaluate foreign materials in lymph nodes draining the sites of joint prostheses, thus precluding confusion with other conditions, such as metastatic carcinoma.

Aged↗