Pathological Characteristics and Classification of Unstable Coronary Atherosclerotic Plaques.

Important forensic diagnostic indicators of sudden death in coronary atherosclerotic heart disease, such as acute or chronic myocardial ischemic changes, sometimes make it difficult to locate the ischemic site due to the short death process, the lack of tissue reaction time. In some cases, the deceased died of sudden death on the first-episode, resulting in difficulty for medical examiners to make an accurate diagnosis. However, clinical studies on coronary instability plaque revealed the key role of coronary spasm and thrombosis caused by their lesions in sudden coronary death process. This paper mainly summarizes the pathological characteristics of unstable coronary plaque based on clinical medical research, including plaque rupture, plaque erosion and calcified nodules, as well as the influencing factors leading to plaque instability, and briefly describes the research progress and technique of the atherosclerotic plaques, in order to improve the study on the mechanism of sudden coronary death and improve the accuracy of the forensic diagnosis of sudden coronary death by diagnosing different pathologic states of coronary atherosclerotic plaques.

[Bletilla striata pseudobulb rot pathogen identification and its biological characteristic].

OBJECTIVE: To identify the pathogen of Bletilla striata pseudobulb rot and provide foundation for formulation effective control measures. METHODS: Surveyed the pathogenesis regularity and disease symptom of Bletilla striata pseudobulb rot,and conducted the pathogen separation, identification,vaccination and research on its biological characteristics. RESULTS: The conditions for mycelium growth were as follows: the temperature ranged from 5 to 35 degrees C, and the optimum temperature ranged from 25 to 30 degrees C. The pH ranged from 3 to 10,and the optimum pH ranged from 6 to 7. The germination rate of conidia was high when the relative humidity was 100%. The lethal temperature was 55 degrees C for 10 min. Illumination had little influence on the germ growth and development. CONCLUSION: The results showed that the pathogen was Fusarium oxysporum.

Clinical Characteristics and Intraoperative Reduction Technique of Thoracolumbar Fractures Combined with Posterior Column Injury.

OBJECTIVE: To analyse the clinical characteristics of thoracolumbar fractures combined with posterior column injury, and explore its intraoperative reduction technique with clinical efficacy. STUDY DESIGN: Descriptive study.                                   Place and Duration of the Study: Department of Orthopaedics, Fuyang People's Hospital, Anhui, China, from December 2017 to 2021. METHODOLOGY: A total of 60 patients met the inclusion criteria, they were divided into two categories according to injury mechanism and imaging characteristics: flexion-distraction injury (FDI) and burst fracture with lamina fracture (BFLF), and their clinical characteristics were analysed. All patients were treated with posterior pedicle screw internal fixation, and different intraoperative reduction methods were adopted for reduction. Measurements of anterior vertebral heights (AVH), local kyphotic angles (LKA), visual analog scale (VAS) and oswestry disability index (ODI) were evaluated preoperative, after operation, and the last follow-up. RESULTS: The two groups of thoracolumbar fractures combined with posterior column injury had different clinical characteristics, and there were significant differences in preoperative imaging related parameters (p<0.05). All patients in the two groups successfully completed the operation, and there were no direct complications related to the operation. The patients were followed up for 12-24 months. Compared with those before the operation, the AVH, LKA, VAS, and ODI immediately after the operation and at the last follow-up were significantly improved (p<0.05). Bone fusion was achieved in all patients. CONCLUSION: Careful and comprehensive preoperative clinical data analysis is the key to diagnosis of thoracolumbar fractures combined with posterior column injury. According to the type of fracture, reasonable selection of intraoperative reduction technique can obtain satisfactory clinical results. KEY WORDS: Burst fracture, Pedicle screw, Internal fixation, Thoracic, Lumbar.

Clinical diagnosis and treatment of primary thyroid tuberculosis: a retrospective study.

BACKGROUND: Primary thyroid tuberculosis (PTT) is an uncommon type of extrapulmonary tuberculosis, which is caused by Mycobacterium tuberculosis. It does not have specific clinical manifestations, and most cases are diagnosed through postoperative histopathological examination. OBJECTIVE: To evaluate the diagnostic pattern and management strategy among patients with primary thyroid tuberculosis. DESIGN AND SETTING: Retrospective study on patients with primary thyroid tuberculosis in the First Hospital of Jilin University (Changchun, China). METHODS: Between March 2015 and June 2020, nine cases of PTT were diagnosed and treated in the Department of Thyroid Surgery of the First Hospital of Jilin University. Age at diagnosis, primary symptoms, preoperative biopsy, operation method, pathological classification, acid-fast staining test, anti-TB therapy and prognosis were registered in order to explore the appropriate protocol for diagnosis and treatment of this disease. RESULTS: None of the patients was diagnosed with thyroid tuberculosis before surgery. All the patients underwent surgery. Granulomatous changes or caseous necrosis in thyroid tissue were found through postoperative histopathological evaluation. Polymerase chain reaction (PCR) results for Mycobacterium tuberculosis were positive in all patients. Most patients had a good prognosis after surgery and anti-tuberculosis drug therapy. CONCLUSION: PTT is a rare disease. It is important to improve the preoperative diagnosis. Preoperative diagnostic accuracy relies on increased awareness of the disease and appropriate use of preoperative diagnostic methods, such as PCR detection, fine-needle aspiration cytology, acid-fast bacillus culture, ultrasound and blood sedimentation. PCR detection of M. tuberculosis is recommended as the gold standard for diagnosis.

Multiple endocrine neoplasia type 1 combined with thyroid neoplasm: A case report and review of literatures.

BACKGROUND: Multiple endocrine neoplasia type 1 (MEN1) is a rare hereditary tumor syndrome inherited in an autosomal dominant manner and presents mostly as parathyroid, endocrine pancreas (such as gastrinoma) and anterior pituitary tumors. At present, papillary thyroid carcinoma (PTC) and nodular goiter are not regarded as components of MEN1. CASE SUMMARY: A 35-year-old woman presented with MEN1 accompanied by coinstantaneous PTC and nodular goiter. The pathological diagnosis was PTC with cervical lymph node metastasis, nodular goiter, parathyroid cyst and adenomatoid hyperplasia. Genetic testing was performed and a MEN1 gene mutation was detected. The patient underwent unilateral lobectomy of the thyroid gland and surgical removal of the parathyroid tumors. At 18 mo of follow-up, ultrasonic examination of the neck showed no abnormality. Serum calcium and parathyroid hormone levels were normal. No new MEN1-associated tumors were detected. CONCLUSION: The role of inactivating mutations of MEN1 gene in tumorigenesis of PTC and/or nodular goiter remains to be determined by more case reports and further research.

Clinical diagnosis and treatment of primary thyroid tuberculosis: a retrospective study

ABSTRACT BACKGROUND: Primary thyroid tuberculosis (PTT) is an uncommon type of extrapulmonary tuberculosis, which is caused by Mycobacterium tuberculosis. It does not have specific clinical manifestations, and most cases are diagnosed through postoperative histopathological examination. OBJECTIVE: To evaluate the diagnostic pattern and management strategy among patients with primary thyroid tuberculosis. DESIGN AND SETTING: Retrospective study on patients with primary thyroid tuberculosis in the First Hospital of Jilin University (Changchun, China). METHODS: Between March 2015 and June 2020, nine cases of PTT were diagnosed and treated in the Department of Thyroid Surgery of the First Hospital of Jilin University. Age at diagnosis, primary symptoms, preoperative biopsy, operation method, pathological classification, acid-fast staining test, anti-TB therapy and prognosis were registered in order to explore the appropriate protocol for diagnosis and treatment of this disease. RESULTS: None of the patients was diagnosed with thyroid tuberculosis before surgery. All the patients underwent surgery. Granulomatous changes or caseous necrosis in thyroid tissue were found through postoperative histopathological evaluation. Polymerase chain reaction (PCR) results for Mycobacterium tuberculosis were positive in all patients. Most patients had a good prognosis after surgery and anti-tuberculosis drug therapy. CONCLUSION: PTT is a rare disease. It is important to improve the preoperative diagnosis. Preoperative diagnostic accuracy relies on increased awareness of the disease and appropriate use of preoperative diagnostic methods, such as PCR detection, fine-needle aspiration cytology, acid-fast bacillus culture, ultrasound and blood sedimentation. PCR detection of M. tuberculosis is recommended as the gold standard for diagnosis.

Association of viral replication capacity with the pathogenicity of enterovirus 71.

Enterovirus 71 (EV71) is a major cause of hand-foot-and-mouth disease, which is associated with fatal neurological disease. The mechanism of EV71 pathogenesis remains obscure. We compared the replication capacity of the severe and mild enterovirus 71 isolates. The replication kinetics of EV71 in RD cells and ICR mice was determined by qRT-PCR. The lung, muscular, brain, intestine tissues were used for histopathological and immunohistochemical assays. The growth curves of EV71 strains in RD cells showed that the severe EV71 strains (SDLY107 and SDLY52) replicated faster and generated more viral RNA than the mild EV71 strains (SDLY11 and SDLY1). The mice infected by the severe EV71 strains (SDLY107) showed more severe clinical symptoms, pathological changes and higher viral load than the mice infected by the mild EV71 strains (SDLY11). These results suggest that there was a difference in replication capacity between the severe and mild EV71 strains, which was possibly associated with EV71 pathogenesis.