Bilateral Avascular Necrosis of the Femoral Head in a Patient with Asymptomatic Adrenal Incidentaloma / 대한고관절학회지

Except when caused by direct and definite mechanisms (e.g., injury of the vessels to the femoral head), the pathophysiology of avascular necrosis of the femoral head has not yet been fully elucidate. While non-traumatic avascular necrosis of the femoral head is known to be caused by alcohol, steroids and various diseases, it may also occur without such events in a patient's history. Herein, a case of bilateral avascular necrosis of the femoral head caused by asymptomatic adrenal cortex incidentaloma which was initially misdiagnosed as idiopathic is reported along with a literature review.

Myogenic Differentiation of Human Adipose-Derived Stem Cells

OBJECTIVE: Cell therapy has been extensively studied as a gene complementation approach in muscular dystrophy including Duchenne muscular dystrophy (DMD), and adipose tissue has recently been identified as a uniquely abundant and adequately accessible source of pluripotent cells. In the present work, we investigated myogenic potentials of adipose-derived stem cells (ADSCs) depending on culture media and isolation with using surface markers. METHOD: Human ADSCs were obtained by liposuction and cultured in two different media; control and myogenic media. In addition we attempted to isolate ADSCs by utilizing surface markers: CD45 and CD133. The following observations were made to evaluate myogenic differentiation as the expression of myogenic regulatory factors (MyoD, Myf-5 and Myf-6) and desmin by RT-PCR and immunoflurescence study. RESULTS: Conversion of ADSCs to myogenic phenotype was observed by indirect immunoflurescence study of MyoD and Myf-5 in regardless of media type and isolation method. In addition mRNA of MyoD and Myf-5 were positive in both culture media, and there were no differences of MyoD and Myf-5 responses between CD45- and CD45-CD133-ADSCs. However, secondary myogenic regulatory factor (Myf-6) was not expressed constantly, and desmin were negative in all cultural condition. CONCLUSION: Our findings suggest that human ADSCs might have myogenic potentials. However, further studies are needed to express the secondary myogenic regulatory factors and proteins in myoblasts.

Noninvasive Respiratory Management for Patients with Cervical Spinal Cord Injury

OBJECTIVE: To verify the safety and clinical utility of noninvasive respiratory management as an alternative method of invasive respiratory management for the patients with cervical spinal cord injury (CSCI) who often present with ventilatory insufficiency (due to inspiratory muscle paralysis) or difficulty in removing airway secretions (because of expiratory muscle weakness). METHOD: Nineteen patients with CSCI (male: 15, female: 4, mean age: 45.6) were recruited. All of the patients were in need of mechanical ventilation due to ventilatory failure or indwelling tracheostomy tube for secretion management. In order to switch from invasive to noninvasive means of respiratory management, expiratory muscle aids such as manual assist or CoughAassist(R) and inspiratory muscle aids such as noninvasive ventilatory support were applied to all candidates. RESULTS: Fifteen out of the 19 patients had indwelling tracheostomy tubes, and the remaining 4 patients were intubated via endotracheal tubes at admission. Through the noninvasive respiratory management, we were able to remove intubation or traheostomy tubes for all of the patients. Eleven patients were able to maintain normal ventilation status without ventilatory support, as time went on. The rest 8 patients were continuously in need of ventilatory support, but they could maintain normal ventilation status by noninvasive method. CONCLUSION: Noninvasive respiratory management is safe and equally effective in treating ventilatory insufficiency or removing airway secretions for patients with CSCI. In cases of long-term ventilator dependency or chronic tracheostomy state, it can be replaced as a creditable alternative to invasive respiratory management.