Objective To analyze quantitatively two-dimensional sonography of bladder cancer and clot with integrated backscatter(IBS) to evaluate its applied value in differential diagnosis of ladder cancer and clot.(Methods The IBS) and IBS% were measured in 32 patients with bladder cancer and 18 patients with bladder clot.(Results There were) significant differences of average image intensity(AII),peak to peak intensity(PPI) and standard deviation of image intensity(SDI) between bladder cancer and clot(P

BACKGROUND:Different sources of stem cells have different molecular characteristics and growth characteristics;therefore, there are some differences in therapeutic mechanisms and effects. OBJECTIVE:To compare mesenchymal stem cells growth characteristics form two sources. METHODS:Mesenchymal stem cells from the umbilical cord and the embryonic liver were isolated and cultured. Passage 5 cells were used to observe the cellmorphology, calculate the doubling time of cellpopulation-doubling time, identify surface markers and determine the differentiation capacity. Mesenchymal stem cells from the umbilical cord were subcultured to passages 10 and 15, and cellcurves were drawn and population doubling time was calculated. RESULTS AND CONCLUSION:Mesenchymal stem cells from these two sources in logarithmic phase were fusiform and grew spiral y with osteogenic, adipogenic, and chondrogenic capacities. The growth curves of cells were both S-shaped. At passage 5, the doubling time was (34.37±0.31) hours for embryonic liver-derived mesenchymal stem cells and (35.63±0.38) hours for umbilical cord-derived mesenchymal stem cells, and there was no significant difference (P>0.05). However, the population doubling time of passages 10 and 15 umbilical cord-derived mesenchymal stem cells was (52.6±0.53) and (53.27±0.92) hours, respectively, which was significantly difference from that of passage 5 cells (P<0.05). The cellmorphology and growth curve from two sources are basical y the same. Embryonic liver-derived stem cells are smal er and proliferate faster than umbilical cord-derived mesenchymal stem cells, but no statistical difference is found between the two types.

Synovial sarcoma is a malignant soft tissue with unknown origin. Although head and neck region is the second common site of involvement, rare cases have been reported in Para nasal sinus and larynx. We presented two cases of synovial sarcoma, one of which arised from maxillary sinus and the other from laryx, and re- view the literature to sum up the diagnosis and treatment strategies. The conclusion is that synovial sarcoma in the head and neck still raises diagnostic and therapeutic issues. Surgical excision with wide margins is essential and necessary, usually associated radiotherapy. The effect of chemotherapy remains to explored.
Head and Neck Neoplasms ; pathology ; Humans ; Larynx ; Maxillary Sinus ; Paranasal Sinuses ; Sarcoma, Synovial ; pathology

Ear Neoplasms ; diagnosis ; Endolymphatic Sac ; pathology ; Humans

Bone Neoplasms ; Chondroblastoma ; Humans ; Ribs ; pathology