[Objective]To investigate the morphological changes of the roof of the subacromial bursa and the extent of involvement of the subacromial bursa after rotator cuff tear.[Method]For the experimental group,the roof of the subacromial bursa was obtained from patients with rotator cuff tear both at the tear site and 2.5 to 3.0 cm distal to the tear site during surgery of rotator cuff repair.For the control group,the roof of the subacromial bursa was obtained during surgery of recurrent shoulder dislocation or humeral shaft fracture at the exposure site.The specimens were processed for histological staining,immunohistochemical analysis and for transmission electron microscopy.The number of cells were quantitated by counting cells with blue-stained nucleus in the subacromial bursa using a computer image analysis system.[Result]The number of cells increased significantly in the roof of the subacromial bursa obtained from both sites,the tear site and the distal site,in the patients with rotator cuff tear,compared with the normal bursa(P

OBJECTIVETo assess the clinical value of (18)F-FDGPET/CT in the diagnosis of larynx carcinoma. Methods Forty-seven patients with larynx carcinoma or suspected larynx carcinoma underwent (18)F-FDG PET/CT examination within a week before therapy. The value of (18)F-FDG PET/CT in the diagnosis and staging of the malignancy was compared with that of unenhanced contrast CT.

METHODSForty-seven patients with larynx carcinoma or suspected larynx carcinoma underwent (18)F-FDG PET/CT examination within a week before therapy. The value of (18)F-FDG PET/CT in the diagnosis and staging of the malignancy was compared with that of unenhanced contrast CT.

RESULTSAmong the 47 patients, a definite diagnosis of larynx carcinomas was established pathologically in 43 patients. For detection of primary tumors, the sensitivity, specificity and accuracy of (18)F-FDG PET/CT were 95.3%, 75% and 93.6%, as compared with 74.4%, 50%, and 72.3% with unenhanced contrast CT scan, respectively, showing significant differences in the diagnostic sensitivity and accuracy between the two modalities (Χ=7.340, P=0.007; Χ=7.532, P=0.006). Twenty-six of the 43 patients were identified to have lymph node metastasis, for which (18)F-FDG PET/CT showed a significantly higher diagnostic sensitivity than unenhanced contrast CT (92.3% vs 61.5%, Χ=6.933, P=0.008). In the 46 excised lymph nodes from 19 patients, 26 were found positive for metastasis, for which (18)F-FDG PET/CT showed a diagnostic sensitivity of 92%, significant higher than that with unenhanced contrast CT (64%, Χ=5.71, P=0.017). PET/CT detected synchronous tumor in one case. (18)F-FDG PET/CT resulted in a change of staging in 34.9% of the patients, including upstaging in 14 patients and down-staging in one patient.

CONCLUSION(18)F-FDG PET/CT can be an important means for diagnosis and initial staging of larynx carcinoma.

Adult ; Aged ; Carcinoma ; diagnostic imaging ; Female ; Fluorodeoxyglucose F18 ; Humans ; Laryngeal Neoplasms ; diagnostic imaging ; Middle Aged ; Multimodal Imaging ; methods ; Positron-Emission Tomography ; Tomography, X-Ray Computed

Cancer-associated fibroblasts(CAFs)are one of the most important cellular components in the external microen-vironment of tumors. CAFs can interact with tumor cells and secrete a variety of soluble factors such as growth factors,chemokines,and so on. CAFs are also involved in the proliferation,invasion,migration,metastasis and drug resistance of colorectal cancer through regu-lating multiple signaling pathways that play a key role in the progression of colorectal cancer. Recent studies have found that CAFs re-lated markers and genes can be used as reference indicators for the predicting prognosis of colorectal cancer. Therefore,targeting CAFs may be a key target for early diagnosis,treatment and prognosis of colorectal cancer. This article summarizes the characteristics of CAFs,recruitment and activation process,and its role in the development of colorectal cancer in order to provide a new scientific di-rection for the mechanism of action and clinical application of CAFs in colorectal cancer.