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Objective:To investigate clinical and histopathological features and differential diagnostic considerations of mucoepidermoid carcinoma (MEC) .Methods:A retrospective study was carried out on clinical manifestations, histopathological and immunohistochemical features, treatment and prognosis of 8 patients with MEC, who were collected from Department of Pathology, Hospital of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College during 2018 - 2021.Results:Among the 8 patients, 5 were males and 3 were females, and their age at onset ranged from 19 to 67 years. Skin lesions were located on the lip mucosa in 5 cases, on the cheek in 2 cases, and on the nose in 1 case. Tumors were all located in the dermis and subcutaneous tissue, parts of which were connected to the epidermis; different proportions of mucous cells, epidermoid cells and intermediate cells were arranged in nests or clumps, and formed solid or cystic structures accompanied by varying degrees of formation of ducts and mucus lakes; all epidermoid cells and intermediate cells expressed cytokeratins AE1/AE3, CK5/6, P63, carcinoembryonic antigen and epithelial membrane antigen. According to the current Chinese grading system, 1 of the 8 patients was diagnosed with intermediate-grade MEC, and others were diagnosed with low-grade MEC. No abnormalities were found by systemic examination. All patients received surgical resections. After the follow-up of 12 - 36 months, no recurrence or distant metastasis was observed.Conclusion:MEC presents no characteristic clinical manifestations, its diagnosis mainly depends on histopathological features, and mucus in the cytoplasm of mucous cells as shown by alcian blue staining is specific for MEC.
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Vasculitis involves a wide spectrum of clinicopathological process with reactive damage to the involved blood vessels. There is loss of vessel integrity instigating haemorrhage & luminal compromise leading to ischemia and necrosis of the tissue supplied by the involved vessels. It may affect varied size and type of blood vessels at different locations. It may be primary or secondary to systemic disease. It may involve a single organ like skin or may involve different organ systems at the same time. This case series include six cases of cutaneous vasculitis affecting different organs with varied presentations. Skin biopsies of six patients with unusual presentations were studied. Their complete history, physical examinations, laboratory investigations including serology were analysed and correlated with histopathological findings. The patients presented with different duration of symptoms varying from as short as 15 days to 1 year. Skin lesions were present in all cases while cardiac manifestation was seen in one. Serology and autoimmune disease markers were negative in all cases except one. However, histopathological features were in concordance with the clinical diagnosis of vasculitis. They were further classified as vasculitis secondary to Churg Strauss syndrome, venous stasis, Henoch Schonlein purpura or leucocytoclastic vasculitis.Vasculitis though a rare disease may manifest as an acute or chronic condition. It needs timely diagnosis by histopathological examination to aid in further management. It is important to assess the clinical severity in primary and secondary vasculitis, as it determines morbidity and mortality.
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Stroke is a devastating cerebrovascular event that occurs as a result of cerebral vascular occlusion (ischemic stroke) or burst/bleeding (hemorrhagic stroke) leading to cerebral blood flow disruption, causing physical disability and multiple functional impairment. The incidence of ischemic stroke is higher than hemorrhagic stroke, accounting for more than half of the total incidence of stroke. The main cause of the disease is caused by atherosclerosis, various arteritis, trauma and other plaques that cause cerebral vascular disease, which may be caused by a variety of cardiovascular diseases such as atrial fibrillation. Blood, caused by blocking blood vessels in the brain. Due to the complexity of the causes of ischemic stroke, the pathogenesis and development mechanism are complex and diverse, such as energy failure, excitotoxicity, neuroinflammation, apoptosis and oxidative stress. Traditional Chinese medicine and compound have the characteristics of multi-component, multi-target, multi-effect, and can be applied to the treatment of different stages of stroke occurrence and development. Therefore, an in-depth understanding of the pathological process and related mechanisms of ischemic stroke, and the development of targeted drugs, is important to prevent the occurrence of ischemic stroke and control its development. In this paper, the timeline of the occurrence and development of ischemic stroke is the main line. The pathological process and related mechanisms are systematically reviewed. The most widely used traditional Chinese medicine and compound in clinical and basic research are summarized, in order to study the pathological study of ischemic stroke. Clinical treatment provides a theoretical basis and data reference.
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Objective To evaluate safety and efficacy of a fractional microneedle radiofrequency device in the treatment of axillary osmidrosis.Methods A total of 24 patients with moderate to severe axillary osmidrosis were enrolled from Department of Dermatology of Peking Union Medical College Hospital between June 2015 and June 2016,and treated with the Body TiteTM fractional microneedle radiofrequency device for 1 session.Visual analogue scale (VAS) was used to evaluate the intensity of axillary odor in patients,36-item short-form health survey (SF-36) to assess health-related quality of life (HRQoL),and axillary skin tissues were resected for histopathological examination before and after the treatment.Results VAS showed that 22 of 24 patients achieved persistent remission for more than 12 weeks,and rates of decrease in odor score ranged from 50％ to 100％.However,1 patient experienced recurrence at 12 weeks after the treatment,and another 1 patient did not achieve clinical remission.SF-36 revealed that scores of social functioning (SF),role-emotional (RE) and mental health (MH) scales were all significantly increased after the treatment [M (P0-P100):100.00 (62.00-112.50),100.00 (33.30-110.00),68.00 (48.00-80.00),respectively] compared with those before the treatment [77.50 (62.50-100.00),66.67 (33.30-100.00),55.00 (48.88-72.00),respectively,all P ＜ 0.05].Histopathological examination showed obvious degeneration and necrosis of sweat gland cells in 22 cases,and epidermal damages in 2 patients after the treatment.Unilateral upper-limb pain occurred in 1 case,and small-area burn-like skin changes were observed in 2 cases after the treatment.The postoperative recovery time ranged from 7 to 14 days.Conclusion The fractional microneedle radiofrequency device has shown high clinical response rate,good safety,and favorable application prospects in the treatment of axillary osmidrosis.
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Objective To observe the pathological changes of heart failure caused by transverse aortic constriction in rats.Methods Partial thoracotomy was performed to the second rib and the transverse aortic constriction was performed between the innominate and left carotid arteries to establish a model of heart failure in 24 rats.The same operation was performed on another 8 rats, except for the ligation of the transverse aorta.Echocardiographic assessment, hemodynamic measurement, myocardial histopathological examination and NT-proBNP measurement were performed to the sham group at 12 weeks and model group at 4 weeks, 8 weeks, 12 weeks after the operation.Result At 4 weeks after the operation, NT-proBNP, EF, FS and -dp/dtmax of the model group was significantly increased and LVESV, +dp/dtmax of the model group were significantly decreased (P<0.05).At 8 weeks after the operation, EF and-dp/dtmax of the model group were increased and +dp/dtmax of the model group was significantly decreased (P<0.05).At 12 weeks after the operation, NT-proBNP, EF and +dp/dtmax of the model group were decreased, and LVESV, LVEDV and -dp/dtmax of the model group were increased (P<0.05).The cardiomyocytes became hypertrophic and lined up in disorder at 4 weeks after the operation.Pathologic examination of the myocardial tissue showed connective tissue proliferation and inflammatory cell infiltration at 8 weeks after the operation, and cardiomyocyte apoptosis and collagen fiber deposition at 12 weeks after the operation.Conclusions Transverse aortic constriction induces heart failure in rats.The pathological processes are compensatory hypertrophy at 4 weeks after the operation, initial reaction of decompensation at 8 weeks after the operation, and heart failure at 12 weeks after the operation.