RESUMO
Objective To investigate the clinicopathological characteristics,immunophenotype and the differential diagnosis of ectopic hamartomatous thymoma (EHT).Methods Three cases with EHT were studyed for clinicopathological and immunohistochemical features, the available literature on this subject was reviewed as well.Results The tumors of 3 patients with EHT were located at left lower neck,right supraclavicular area,and left supraclavicular area respectively,and were underwent local resection.The well-defined nodular tumors were en-capsulated with gray-yellowish cut surface,with size of 2.5 cm ×1.9 cm,4.5 cm ×4.5 cm,and 3.0 cm ×2.5 cm,respectively.Microscopi-cally,the tumors were composed of spindle cells,epithelium,and adipose tissue with the predomination of spindle cell.A gradual transition from epithelial cells to spindle cells was frequently present.Immunohistochemically,both the spindle cell and epithelial components were dif-fusely and intensely positive for AE1 /AE3,CK7,CK19,and P63.Two patients with EHT were followed up for 18 and 27 months,both without any evidence of metastasis or recurrence.Conclusion EHT is an exceedingly rare benign tumor with distinctive location and histological fea-tures and should be differentiated from biphasic synovial sarcoma,malignant schwannoma with epithelial differentiation,mixed tumor,thymoli-poma,et al.The total focal excision is the first treatment of choice for EHT.
RESUMO
BacKground:The mechanism of diabetic gastrointestinaI dysmotiIity is stiII uncIear. More and more studies showed that gastrointestinaI smooth muscIe derived factors pIay an important roIe in gastrointestinaI dysmotiIity. RecentIy,the roIe of RhoA/ROCK signaIing pathway in diabetic compIications become a research hotspot. Aims:To investigate the possibIe roIe of RhoA/ROCK signaIing pathway in diabetic coIon dysmotiIity by examining the expressions of major signaIing moIecuIes in diabetic coIon muscIe. Methods:NormaI coIon tissue sampIes taken from patients undergoing radicaI surgery for coIonic cancer from Sept. 2012 to Dec. 2013 at the First AffiIiated HospitaI of Nanjing MedicaI University were coIIected. According to gIycated hemogIobin IeveI,the patients were divided into diabetes meIIitus( DM)group and controI group. The expressions of major signaIing moIecuIes in RhoA/ROCK1 signaIing pathway incIuding RhoA,ROCK1,MYPT1 and p-MYPT1 were determined by immunohistochemistry or Western bIotting. Results:Immunohistochemistry showed that expression of RhoA protein in DM group was significantIy Iower than that in controI group(P0. 05). Conclusions:The inhibition of RhoA/ROCK signaIing pathway in diabetic coIon muscIe may have some correIation with diabetic coIon dysmotiIity.