Polychromatic Flow Cytometric Analysis of Stromal Vascular Fraction from Lipoaspirate and Microfragmented Counterparts Reveals Sex-Related Immunophenotype Differences

Mesenchymal stem/stromal cells or medicinal signaling cells (MSC)-based therapy holds promise as a beneficial strategy for treating knee OA (osteoarthritis), but there is no standardized protocols nor mechanistic understanding. In order to gain a better insight into the human MSC from adipose tissue applied for autologous OA treatment, we performed extensive comparative immunophenotyping of the stromal vascular fraction from lipoaspirate or microfragmented lipoaspirates by polychromatic flow cytometry and investigated the cellular components considered responsible for cartilage regeneration. We found an enrichment of the regenerative cellular niche of the clinically applied microfragmented stromal vascular fraction. Sex-related differences were observed in the MSC marker expression and the ratio of the progenitor cells from fresh lipoaspirate, which, in female patients, contained a higher expression of CD90 on the three progenitor cell types including pericytes, a higher expression of CD105 and CD146 on CD31^highCD34^high endothelial progenitors as well as of CD73 on supra-adventitialadipose stromal cells. Some of these MSC-expression differences were present after microfragmentation and indicated a differential phenotype pattern of the applied MSC mixture in female and male patients. Our results provide a better insight into the heterogeneity of the adipose MSC subpopulations serving as OA therapeutics, with an emphasis on interesting differences between women and men.

Imaging of Articular and Extra-articular Sports Injuries of the Hip

Sports-related articular and periarticular hip injuries are common in athletes. Knowledge of patient complaints and clinical findings are crucial for adequate interpretation of imaging examinations. However, asymptomatic athletes can present abnormal imaging findings, and clinical presentation of hip injuries may be nonspecific. Therefore, a thorough examination of the hip and surrounding soft tissue images is essential.This review describes the intra-articular pathologies encountered in sports activities including labrum or cartilage lesions, associated or not with femoroacetabular hip impingement syndromes, as well as ligament teres injuries, using magnetic resonance imaging (MRI) or computed tomography arthrography. Different causes of snapping hip syndrome (from intra- and extra-articular origins) are also discussed and illustrated. The extra-articular forms of hip impingement syndromes including ischiofemoral and subspine impingement are depicted with MRI and ultrasound. Diagnostic imaging of bone avulsions, greater trochanteric syndrome, athletic pubalgia, and myotendinous injuries is also described.

Identification process of skeletal remains from mass graves: Our experience and proposal guidelines

Aim of this paper is to present our experience and proposal guidelines for reducing the number of samples for DNA analysis of skeletal remains from mass graves, whether for scientific purpose or for the identification of mass graves victims. Therefore, the analysis of 94 bone fragments included the following measurements: femur length and the femoral head diameter, the diameter of the upper, wider portion and lower wider portion of the bone fragment, densitometry of the fragments and measurement of mass and volume of fragments. Bone density was determined on the basis of measured values of mass and volume. The results of fragment matching by physical analyses were compared with the pairing results obtained by previously conducted DNA analysis. Deviation in measured values of matching bone fragments that made a pair was calculated for all successfully matched fragments. By the results of DNA analysis 36 femoral pairs were successfully formed. Measured values were added to the DNA analysis. Out of 36 pairs, positively ascertained by the DNA analysis, 29 pairs were formed after adding the results of physical measurements and removing the data where femur samples were damaged. Total correspondence in measurements of the femoral length was noted in 25.9% pairs, while the correspondence within the 5% error was 100%. Density of the tested femurs was significantly different for the same person (DNA match), both for the left and the right femoral fragment. It would be optimal to choose only the whole-length left or right femur and thus reduce the number of samples by 50%. With regard to the results of our research and the observations deriving from them, as well as to the guidelines we used in the study, we suggested these guidelines be used both for scientific researches and to identify mass graves victims.

One-stage operation for locked bilateral posterior dislocation of the shoulder

A man of 52 years of age had a grand mal seizure. He presented to our unit three months later with irreducible bilateral posterior dislocation of the shoulder. CT scans revealed large compression defects on the anteromedial aspect of the heads of both humeri. The defect on the right side was of more than 50% of the articular surface, and on the left side of 40%. He was treated by a one-stage operation with a hemiarthroplasty on one side and reconstruction of the head by an osteochondral autograft on the other. Three years later the clinical and radiological results were excellent.