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PubMed1976

[Juxtacortical osteosarcoma (author's transl)].

Juxtacortical osteosarcoma should be considered a very rate distinctive entity under all malignant bone tumors. The tumor has a remarkable tendency to grow from the periostal tissues peripherally with a usually marked degree of ossification without primary medullary involvement. It's different und characteristic behavior in clinical, roentgenographic and microscopic findings from that of other types of bone-forming sarkomas is discussed by means of a just treated case. In contrast to osteogenic osteosarcoma the prognosis for early well treated juxtacortical osteosarcoma is much better.

Adult↗
PubMed1988

Sonoanatomy of the muscles of facial expression.

Primary anatomic studies served for identification and differentiation of the individual mimetic muscles. As a second step, we investigated the clinical potential of ultrasound imaging to visualize the mimetic musculature in 15 volunteers. This examination technique was used to diagnose pathological alterations, especially associated with facial palsy. The excellent sonographic visualization of the mimetic musculature indicates that this technique may be a valuable adjunct in the diagnosis and differentiation of facial palsy, as well as in planning plastic surgery and reconstructive procedures, and in follow-up care.

Adolescent↗
PubMed2001

[Differential diagnosis of bone and soft tissue tumors by MRI].

Musculoskeletal neoplasms are rare, and both the medical history and complaints of the patients are usually uncharacteristic and of limited information. After a clinical evaluation and biplane conventional radiography, the clinician must classify the patient as having a nonprogressive or progressive primary benign, primary malignant, or metastatic bone tumor. In the case of a probably benign, nonprogressive bone tumor, the patient has to be observed continuously or an additional biopsy should be performed. In the case of a probably malignant lesion, the patient should be referred for further staging and treatment to an orthopedic oncologist. Conventional biplane radiography, scintiscan, computed tomography scan, and magnetic resonance imaging (MRI) are indispensable in staging and treatment planning for patients with musculoskeletal tumors. For limb salvage procedures, delineation of the tumor from adjacent tissue structures is crucial. Hence, MRI of the entire anatomic structure involved, together with adjacent joints, is of the utmost importance, both in the coronal and axial planes. The significance of MRI in clinical follow-up depends on keeping the sequences and imaging planes used constant. Differentiating pseudotumors from true neoplasms still poses a challenge. The cellular pattern and matrix characteristics of a lesion cannot definitely be identified as neoplastic even with application of all imaging modalities including MRI. Information on epidemiology, clinical picture, radiology, and histology of the lesion is necessary to draw a firm conclusion. Biopsy is still the first choice in making the diagnosis.

Adult↗
PubMed2005

Heterotopic ossification: a review.

Heterotopic ossification is the formation of bone in the soft tissues. Soft tissue bone deposition may range from the minimal and inconsequential to massive and clinically significant. In some clinical settings it is a predictable finding with an unpredictable course and in other settings it may be diagnostically confounding. Heterotopic ossification may be encountered in clinically disparate disease processes and circumstances. We review the genetic, neurogenic, post-traumatic, post-surgical and "reactive" causes of heterotopic ossification and discuss some current concepts of its pathogenesis.

Arthroplasty, Replacement, Hip↗
PubMed2001

Melorheostosis: a review of 23 cases.

The aim of this study was to review clinical and radiological signs of melorheostosis in a large series of cases. Family history, patient history, clinical data and radiological features of 23 consecutive cases of melorheostosis were investigated. Criteria for establishing the diagnosis "melorheostosis" were defined. Sixteen patients (mean age 34 years, equal ratio between genders) had chronic pain in the affected limb(s) and/or subcutaneous fibrosis and/or various skin lesions. Number of involved bones: one bone (n = 10); two bones (n = 4); three or more bones (n = 9). Anatomic distribution: upper extremity (n = 5); lower extremity (n = 16); upper and lower extremity (n = 1); sacrum (n = 1). Radiologic pattern: osteoma-like (n = 7); classic candle wax appearance (n = 5); myositis ossificans-like (n = 1); osteopathia striata-like (n = 6); mixed pattern (n = 4). Patterns different from the appearance formerly judged to be "classic" prevail. The standard concept of disease manifestation has to be adjusted. Pathogenesis remains unclear. The classic theory claims the presence of an early embryonic infection of a sensory nerve inducing changes in the respective sclerotome, but we propose the concept of mosaicism as a better explanation for the sporadic occurrence, the asymmetric "segmental" pattern with variable extent of involvement and equal gender ratio of the disease.

Adolescent↗
PubMed1982

Traumatic anterior dislocation of the hip in childhood.

One hundred and eleven traumatic anterior dislocations of the hip in children were collected from the literature and statistically evaluated together with 4 cases treated at our institute. The incidence of open dislocations, associated lesions (avulsion of the greater trochanter, damage to the femoral vessels, and fracture on the shaft of the ipsilateral femur), and irreducible recent dislocations was noteworthy, demanding special methods of primary management. In 41 patients, with follow-up averaging 5 years, the incidence of complications, especially avascular necrosis, was also high. Anterior dislocation of the hip in this age group is to be considered a serious injury. Concerning the final state of the hip-joint, factors giving a poor prognosis appear to be severe injury, open dislocation, associated fractures near the joint, delayed reduction, and, possibly, open procedures.

Adolescent↗