The key points to the successful repair of cerebrospinal fluid rhinorrhea / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To summarize the clinical experience of endoscopic repair for cerebrospinal fluid (CSF) rhinorrhea in our department in the last 4 years.@*METHOD@#Clinical data of 16 patients with CSF rhinorrhea who underwent nasal endoscopic repair was analyzed retrospectively. The effect of etiology, image data, location of CSF leaks and surgical techniques on treatment were discussed.@*RESULT@#Among the 16 patients, 10 were diagnosed with spontaneous CSF rhinorrhea, 2 were diagnosed with traumatic CSF rhinorrhea, 3 were diagnosed with CSF rhinorrhea after catching cold and 1 was diagnosed with meningo-encephalocele in with CSF rhinorrhea. The leak was located by CT scan in 11 cases, by MRI in 7 cases. The common locations of the defect were the frontal sinus (3 cases), cribriform roof (3 cases), sphenoid sinus (6 cases) and the nasal cavity top (4 cases). All the cases were successfully cured after the first nasal endoscopic repair with autologous materials. None of patients had a reoccurrence during 10 to 42 months follow-up time.@*CONCLUSION@#The application of CT and MRC before surgery which could make an accurate diagnosis of the location and the size of the defect. The correct selection of repair materials, processing planting bed around the leakage and complete contacting leakage with graft bed are the key points to the successful surgery of CSF rhinorrhea.

Dysregulation of E-cadherin in chronic rhinosinusitis with nasal polyps / 华中科技大学学报（医学）（英德文版）

E-cadherin is a key epithelial protein and adhesive molecule. This study detected the E-cadherin expression in patients with chronic rhinosinusitis with nasal polyps (CRSwNP) and controls, and analyzed its possible role in the pathogenesis of CRSwNP. The expression of E-cadherin was detected by using Western blotting and immunohistochemistry in controls and patients with CRSwNP. Computed tomography (CT) scan findings were scored. The results showed that the E-cadherin expression was up-regulated in patients with CRSwNP as compared with controls (P=0.039) and the positive staining was predominantly localized on the epithelial cell membrane. E-cadherin level was correlated negatively with Lund-Mackay scores in patients with CRSwNP (r=-0.604, P=0.005). It is suggested that E-cadherin may be involved in the pathogenesis of CRSwNP and correlated with disease severity.

The diagnosis and treatment of traumatic pseudoaneurysm of internal carotid artery in sphenoid sinus (a report of 6 cases) / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#In order to prevent misdiagnosis and degrade death rate, we explored the early diagnosis and correct treatment methods of traumatic pseudoaneurysm of internal carotid artery in sphenoid sinus.@*METHOD@#The clinic data of 6 cases who had traumatic pseudoaneurysm of internal carotid artery in sphenoid sinus and were admitted in our hospital were analyzed retrospectively. Large numbers of literature about the disease were reviewed. Some early diagnosis methods and optimal treatment schemes were proposed.@*RESULT@#All patients had a history of cranium trauma and recurrent attacks nasal hemorrhage. There are two patients with a complication of sight loss in single eye. In the six cases, one case was treated with unilateral common carotid artery ligation, three cases were treated with aneurysm and internal carotid artery embolism by using sacculus proprius which is able to shedding, one case was treated with internal carotid artery embolism by using tiny circlip ring. These five patients were cured with no severe complication. One patient death of hemorrhage. His nasal cavity was tamponade repeatedly because repeat nasal hemorrhage. However, he had never treated with internal carotid artery embolism.@*CONCLUSION@#The patients who have traumatic pseudoaneurysm of internal carotid artery usually die of unmanageable hemorrhage. The patients may be cured if they could obtain an early diagnosis and correct treatment.

Operation pathways for sphenoidal sinus by nasal endoscope and treatments for correlated diseases beyond scope of sphenoidal sinus / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#We probe more direct operation pathways in sphenoidal sinus and saddle area, and take proper measures for correlated diseases which surpass scope of sphenoidal sinus by combining image data, which could prevent serious complication.@*METHOD@#Under nasal endoscope, the operation approaches we adopted included trans-anterior ethmoid sinus-posterior ethmoid sinus-sphenoidal sinus pathway, trans-meatus nasi superior-posterior ethmoid sinus-sphenoidal sinus pathway, trans nasal septum-sphenoidal sinus pathway and trans-natural opening of sphenoid sinus anterior into sphenoid sinus pathway by taking upper edge of posterior naris as a consistent surgical landmark. Forty-six cases who had sphenoidal sinus mass with bone erosion received surgical treatment.@*RESULT@#Twenty-one cases with cyst and pus cyst of sphenoidal sinus had been healed by trans-meatus nasi superior pathway; 1 case with hematoma and organization in sphenoidal sinus had been cleared by trans-meatus nasi superior pathway; 3 cases had hematoma and organization in sphenoidal sinus and pseudoaneurysm in internal carotid artery, one of them suffered fatal hemorrhage in surgical exploration, and cured by endovascular embolization, the other two only underwent nasal endoscopic examination, the diagnosis was established by DSA and they received interventional therapy; 4 cases with papilloma in sphenoidal sinus had been treated by trans-natural opening of sphenoid sinus approach, and 3 cases were cured, 1 case had only partial mass resection as the papilloma offended the outer wall of sphenoidal sinus diffusely; 2 cases with cholesteatoma of sphenoid sinus have been removed completely by trans-meatus nasi superior approach; 1 case with encephalomeningocele of sphenoidal sinus underwent sphenoidotomy by trans-natural opening of anterior of sphenoidal sinus, and intraoperative puncture showed characteristic cerebrospinal fluid, the exposed meninges were then repair surgically; 1 case with mycosis of sphenoidal sinus had been cured by thorough clearing of the lesion in sphenoidal sinus combined with antifungal therapy; 3 cases with malignancy of sphenoidal sinus had received major mass resection of sphenoidal sinus by trans-anterior ethmoid sinus-posterior ethmoid sinus approach, and followed with radio therapy and chemotherapy; 5 cases with NPC involving sphenoidal sinus had been treated by radio therapy and chemotherapy after pathological examination; 5 cases with post-operative cerebrospinal rhinorrhea and granulation hyperplasia of sphenoidal sinus had been repaired successfully by trans-meatus nasi superior approach or tans-nasal septum approach.@*CONCLUSION@#There are various surgical pathways to deal with sphenoidal sinus and correlated diseases under nasal endoscope. The operation will be direct, safe and minimal invasive if we choose the pathway properly. Thin slice CT scan and 3D reconstruction of sella, and DSA or angiography of brain before operation is one of effective means to prevent surgical complications for lesions beyond scope of sphenoidal sinus.

Operation pathways for sphenoidal sinus by nasal endoscope and treatments for correlated diseases beyond scope of sphenoidal sinus / 临床耳鼻咽喉头颈外科杂志

Objective:We probe more direct operation pathways in sphenoidal sinus and saddle area, and take proper measures for correlated diseases which surpass scope of sphenoidal sinus by combining image data, which could prevent serious complication.Method:Under nasal endoscope, the operation approaches we adopted included trans-anterior ethmoid sinus-posterior ethmoid sinus-sphenoidal sinus pathway, trans-meatus nasi superior-posterior ethmoid sinus-sphenoidal sinus pathway, trans nasal septum-sphenoidal sinus pathway and trans-natural opening of sphenoid sinus anterior into sphenoid sinus pathway by taking upper edge of posterior naris as a consistent surgical landmark. Forty-six cases who had sphenoidal sinus mass with bone erosion recieved surgical treatment.Result:Twenty-one cases with cyst and pus cyst of sphenoidal sinus had been healed by trans-meatus nasi superior pathway;1 case with hematoma and organization in sphenoidal sinus had been cleared by trans-meatus nasi superior pathway;3 cases had hematoma and organization in sphenoidal sinus and pseudoaneurysm in internal carotid artery,one of them suffered fatal hemorrhage in surgical exploration, and cured by endovascular embolization, the other two only underwent nasal endoscopic examination,the diagnosis was established by DSA and they received interventional therapy;4 cases with papilloma in sphenoidal sinus had been treated by trans-natural opening of sphenoid sinus approach,and 3 cases were cured,1 case had only partial mass resection as the papilloma offended the outer wall of sphenoidal sinus diffusely;2 cases with cholesteatoma of sphenoid sinus have been removed completely by trans-meatus nasi superior approach;1 case with encephalomeningocele of sphenoidal sinus underwent sphenoidotomy by trans-natural opening of anterior of sphenoidal sinus, and intraoperative puncture showed characteristic cerebrospinal fluid,the exposed meninges were then repaird surgically;1 case with mycosis of sphenoidal sinus had been cured by thorough clearing of the leision in sphenoidal sinus combined with antifungal therapy;3 cases with malignancy of sphenoidal sinus had received major mass resection of sphenoidal sinus by trans-anterior ethmoid sinus-posterior ethmoid sinus approach, and followed with radio therapy and chemotheraphy;5 cases with NPC in-volving sphenoidal sinus had been treated by radio therapy and chemotherapy after pathological examinacation;5 cases with post-operative cerebrospinal rhinorrhea and granulation hyperplasia of sphenoidal sinus had been repaired successfully by trans-meatus nasi superior approach or tans-nasal septum approach.Conclusion:There are various surgical pathways to deal with sphenoidal sinus and correlated diseases under nasal endoscope.The operation will be direct, safe and minimal invasive if we choose the pathway properly. Thin slice CT scan and 3D reconstruction of sella, and DSA or angiography of brain before operation is one of effective means to prevent surgical complications for leisions beyond scope of sphenoidal sinus.

The diagnosis and treatment of traumatic pseudoaneurysm of internalcarotid artery in sphenoid sinus(a report of 6 cases) / 临床耳鼻咽喉头颈外科杂志

Objective:In order to prevent misdiagnosis and degrade death rate, we explored the early diagnosis and correct treatment methods of traumatic pseudoaneurysm of internal carotid artery in sphenoid sinus,. Method: The clinic data of 6 cases who had traumatic pseudoaneurysm of internal carotid artery in sphenoid sinus and were admited in our hospital were analyzed retrospectively. Large numbers of literature about the disease were re-viewed. Some early diagnosis methods and optimal treatment schemes were proposed. Result: All patients had a history of cranium trauma and recurrent attacks nasal hemorrhage. There are two patients with a complication of sight loss in single eye. In the six cases, one case was treated with unilateral common carotid artery ligation, three cases were treated with aneurysm and internal carotid artery embolism by using sacculus proprius which is able to shedding , one case was treated with internal carotid artery embolism by using tiny circlip ring . These five pa-tients were crued with no severe complication. One patient death of hemorrhea. His nasal cavity was tamponaded repeatly because repeat nasal hemorrhage. However, he had never treated with internal carotid artery embolism. Conclusion:The patients who have traumatic pseudoaneurysm of internal carotid artery usually die of unmanageable hemorrhea. The patients may be cured if they could obtain an early diagnosis and correct treatment.

Four-stage gradual expanding approach of problem based learning in otorhinolaryngology / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#The aim of the study is to cover the shortages of PBL, such as time-consuming, abstract, lacking of the course of clinic practice, and to introduce PBL to the teaching of otorhinolaryngology.@*METHOD@#By the improvement of the international classic teaching model of PBL, we put forward "four-stage gradual expanding approach of PBL" and establish "four-stage gradual expanding approach of PBL in otorhinolaryngology".@*RESULT@#Through the four stages of watching PBL, simulation PBL, internship PBL, practice PBL, we have accomplished the organic integration of theory teaching and clinical practice.@*CONCLUSION@#This teaching method is more adaptive to the teaching of otorhinolaryngology, and it can help the medicine students to establish the whole concept of medicine and can stimulate them to form the good habits of self-regulated learning and life-long learning efficiently.

The establishment of paired-standardized patients and its application in the PBL teaching of otorhinolaryngology / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#The aim of the study is to explore the establishment of paired-standardized patients (PSPs), which can cover the deficiency of standardized patients.@*METHOD@#The outpatients and standardized patients consist of PSPs. The standard case of PSPs is established by the combination of PSPs and the laboratory and imaging information of the true patients. Then we apply the PBL model and PSPs to the clinic teaching in otorhinolaryngology.@*RESULT@#The study of the ten standard cases of PSPs, which we have established, has enhanced the confidence and interest of medical students in clinical practice.@*CONCLUSION@#PSPs can cover the deficiency of standardized patients, which includes lacking of change and lively. At the other hand, PSPs can practice the medical students' clinical skills and the way of evidence-based medicine and can stimulate them to form the good habit of self-regulated learning.

Observation of ultrastructure and ECP expression in nasal polyps / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To observe the ultrastructural feature and ECP expression in nasal polyps, and aim to explore its role in the pathogenesis of CRSwNP.@*METHOD@#5 CRSwNP, 5 CRS and 5 control patients underwent sinus surgery were gathered to detect its ultrastructure and expression of ECP by in situ hybridization and electron microscopy technique.@*RESULT@#Under electron microscopy, the eosinophilic cells in CRSwNP group increased, its membrane was intact but fold, the feature of pseudopodium, degranulation and cavitation were all found. The expression level of ECP mRNA was up-regulated.@*CONCLUSION@#The findings suggest that eosinophilic infiltrate and ECP cytologic inflammation reactions may involve in the pathogenesis of CRSwNP.

Effects of toll-like-receptor-9 expression in chronic rhinosinusitis with nasal polyps / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To determine the presence of TLR-9 protein in primary epithelial cell cultures of chronic rhinosinusitis with nasal polyps (CRSwNP), and then explore the role of innate immune recognition in the pathogenesis of CRSwNP.@*METHOD@#Primary epithelial cell cultures were established in 10 controls and 10 CRSwNP patients who underwent sinus surgery, and flow cytometry was used to confirm its purity and measure the expression of TLR-9 protein.@*RESULT@#By digestive method 98% of cultured primary nasal mucosa cells were epithelial cells and the expression of TLR-9 protein in CRSwNP group (11%-15%) was lower than that in normal group (49%-60%).@*CONCLUSION@#This finding suggests that impaired innate immune responses via TLR-9 on sinonasal epithelial cells may involve in pathogenesis of CRSwNP.

Investigation of the surgical approach for resecting infratemporal fossa pterygomaxillary fossa-parapharyngeal space tumor / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To investigate the optimal surgical approach for resecting infratemporal fossa-pterygomaxillary fossa-parapharyngeal space tumor. The aim of this study is to enhance therapeutic effect and reduce complications and sequelae.@*METHOD@#Sixty-six patients with infratemporal fossa-pterygomaxillary fossa-parapharyngeal space tumor were analyzed retrospectively from 1998-2004, including complains, symptoms, physical signs; histodiagnosis, image examinations and surgical approaches.@*RESULT@#No recurrence was found in fifty benign tumor cases after 2 to 5 years, while in 16 cases with malignant tumor, four patients died in one year, 8 cases died in 2 to 4 years, and only 4 patients' survival time exceeded 4 years.@*CONCLUSION@#Extended maxillectomy is suitable for resecting primary carcinoma of maxillary sinus invading pterygomaxillary fossa, infratemporal fossa and /or parapharyngeal space tumor. also midface degloving approach is suitable for nasal primary cavity, nasal sinuses, nasopharynx and/or pterygomaxillary fossa tumor and localized malignant tumor. Trans-cervical combining mandibular split swing approach is suitable for parapharyngeal space tumor invading pterygomaxillary fossa and/or infratemporal fossa tumor. Trans-cervical jaw combining mandibulotomy is suitable for resecting parapharyngeal space, infratemporal fossa tumor for invading lateral skull base and pterygomaxillary fossa tumor.

Vascular Endothelial Growth Factor165-regulated Nasopharyngeal Carcinoma Cell Lines Invasion and Migration Involve Expression and Activation of Matrix Metalloproteinase-2 / 华中科技大学学报（医学）（英德文版）

The effect of vascular endothelial growth factor (VEGF) overexpression on matrix metalloproteinase-2 (MMP-2) in nasopharyngeal carcinoma (NPC) cells in vitro and the possible mechanism involved were investigated, and the correlation between the expression of VEGF and MMP-2 in NPC evaluated. The NPC cells were transfected with PAd-trackVEGF165 plasmid. The expression levels of VEGF and MMP-2 mRNA and protein in NPC cells were detected by semi-quantitative RT-PCR and Western blot respectively. It was found that the expression of VEGF and MMP-2 mRNA and protein was significantly increased in NPC cells after transfection of VEGF165. It was concluded that the expression of VEGF was correlated to the in vitro invasion of NPC cells, and the induction of MMP-2 by VEGF was a key process of NPC cell invasion.

Vascular endothelial growth factor165-regulated nasopharyngeal carcinoma cell lines invasion and migration involve expression and activation of matrix metalloproteinase-2 / 华中科技大学学报（医学）（英德文版）

The effect of vascular endothelial growth factor (VEGF) overexpression on matrix metalloproteinase-2 (MMP-2) in nasopharyngeal carcinoma (NPC) cells in vitro and the possible mechanism involved were investigated, and the correlation between the expression of VEGF and MMP-2 in NPC evaluated. The NPC cells were transfected with PAd-trackVEGF165 plasmid. The expression levels of VEGF and MMP-2 mRNA and protein in NPC cells were detected by semi-quantitative RT-PCR and Western blot respectively. It was found that the expression of VEGF and MMP-2 mRNA and protein was significantly increased in NPC cells after transfection of VEGF165. It was concluded that the expression of VEGF was correlated to the in vitro invasion of NPC cells, and the induction of MMP-2 by VEGF was a key process of NPC cell invasion.