Objective To summarize the clinical features of vascular malformations complicated with airway obstruction and to evaluate the therapeutic methods of these disease. Methods Forty-seven children with airway obstruction and dyspnea (25 males, 22 females) were treated from Jun 1985 to Dec 2007, and their clinical data were retrospectively analyzed. Among 47 patients, there were 27 cases of venous malformations,17 cases of macrocystic lymphatic malformations, and 3 cases of microcystic lymphatic malformations. Injection with absolute alcohol were performed in 20 patients with venous malformations, whereas both sugery and injection were performed in 7 patients with extensive or multiple lesions. Seventeen patients with macrocystic lymphatic malformations were treated with pingyangmycin injection. While surgery combined with pingyangmycin injection were used in other 3 patients with microcystic lymphatic malformations. According to the degree of airway obstruction and therapeutic conditions, tracheal intubation was performed in 27 patients, urgent preoperative tracheotomy was performed in 3 patients, prophylactic tracheotomy was performed in 2 patients, and postoperative tracheotomy was performed in 1 patient. Results Tracheal intubation was remained for 24 to 48 hours in 30 patients, whose intubation was removed successfully in 29 patients except 1 patient who occurred dyspnea after removal of tracheal intubation resulting in tracheotomy. Tracheal cannula was successfully removed in all 6 patients 3 weeks to 4 months after the tracheotomy. There were 9 patients treated once, whereas injections were repeated 2 to 5 times in 38 patients. Necrosis of mucosa occurred in 2 cases after the injection with absolute alcohol, while temporary hemoglobinuriaone occurred in 1. There were 5 cases of light or mediate fever after the pingyangmycin injection who recovered well after the symptomatic treatment. Follow-up lasted 1 to 23 years, 38 patients cured, 9 patients valid, and no patient invalid. Conclusions It is suggested that sclerotherapy should be the first choice in the treatment of vascular malformations complicated with airway obstruction, in which absolute alcohol should be used in venous malformations compared to pingyangmycin in lymphatic malformations. Combined therapy should be carried out in patients with extensive lesions in order to shorten the course of treatment and to get good therapeutic result.

Objective To evaluate the short-term results and safety of propranolol for the treatment of infantile parotid hemangioma.Methods Oral propranolol was administered to 17 infants with parotid heamngiom at a dose of 1.0-1.5 mg per kilogram of body weight per day.The patients were revisited once a week.The changes of the tumor size, texture and colour were monitored and recorded at a regular interval.The adverse effects after medication were observed and managed accordingly.The short-term results were evaluated using a 4 scales system.Results Among the 17 patients treated, the follow-up time was 5 to 10 months.The overall response was scale I in 0 patient, scale Ⅱ in 0 patients, scale Ⅲ in 5 patients, and scale Ⅳ in 12 patients.No serious adverse effects were encountered.Conclusions Oral propranolol at a lower dose is a safe and effective method for the treatment of infantile parotid heamngioma.The short-term results were excellent and the side effects minimal.

Objective To realize the automated bone age assessment by applying deep learning to digital radiography(DR)image recognition of left wrist joint in Uyghur teenagers, and explore its practical ap-plication value in forensic medicine bone age assessment. Methods The X-ray films of left wrist joint after pretreatment, which were taken from 245 male and 227 female Uyghur nationality teenagers in Uygur Autonomous Region aged from 13.0 to 19.0 years old, were chosen as subjects. And AlexNet was as a regression model of image recognition. From the total samples above, 60% of male and fe-male DR images of left wrist joint were selected as net train set, and 10% of samples were selected as validation set. As test set, the rest 30%were used to obtain the image recognition accuracy with an error range in ±1.0 and ±0.7 age respectively, compared to the real age. Results The modelling results of deep learning algorithm showed that when the error range was in ±1.0 and ±0.7 age respectively, the accuracy of the net train set was 81.4% and 75.6% in male, and 80.5% and 74.8% in female, respectively. When the error range was in ±1.0 and ±0.7 age respectively, the accuracy of the test set was 79.5% and 71.2% in male, and 79.4% and 66.2% in female, respectively. Conclusion The combination of bone age research on teenagers' left wrist joint and deep learning, which has high accuracy and good feasi-bility, can be the research basis of bone age automatic assessment system for the rest joints of body.