Objective To summarize the current status of pedicled flaps for defect repair and reconstruction after head and neck tumor resection, and to present its application prospects. Methods Related literature was reviewed, and the role evolution of pedicled flaps in the reconstruction of head and neck defects were discussed. The advance, anatomical basis, indications, advantages, disadvantages, and modification of several frequently used pedicled flaps were summarized. Results The evolution of pedicled flaps application showed a resurgence trend in recent years. Some new pedicled flaps, e.g., submental artery island flap, supraclavicular artery island flap, submandibular gland flap, and facial artery musculomucosal flap, can acquire equivalent or even superior outcome to free flaps in certain cases. Technological modification of some traditional pedicled flaps, e.g., nasolabial flap, pectoralis major myocutaneous flap, latissimus dorsi musculocutaneous flap, temporalis myofascial flap, and temporoparietal fascial flap, can further broaden their indications. These traditional flaps still occupy an irreplaceable role, especially in patients with poor condition and institution with immature microsurgical techniques. Conclusion The pedicled flaps still plays an important role in head and neck reconstruction after tumor resection. In certain cases, they demonstrate some advantages over free flaps, e.g., more convenient harvest, more rapid recovery, less expenditure, and better functional and aesthetic effect.
Objective To choose suitable free flaps for reconstructing headand neck defects caused by tumor resection. Methods A retrospective analyses was made in 86 cases of head and neck defects treated with four kinds of free flaps between January 1999 and January 2002. The head and neck defects were caused by tumor resection. The locations were oral cavity (n=32), hypopharynx (n=27), mandible (n=12), skull base (n=5), scalp and skin (n=6) andmidface(n=4). The donor sites of free flaps included the rectus abdominis (n=32), anterolateral thigh (n=10),jejunum (n=25), fibula (n=11), latissimus dorsi (n=4), forearm (n=3) and scapula (n=1). The sizesof the cutaneous/musculocutaneous flaps ranged from 4 cm×5 cm to 14 cm×24 cm. The lengths of the fibula were 4-16 cm,of jejunum 9-20 cm. Results The overall free flap success rate was 92% (79/86). Of 32 oral cavity defects, 22 were reconstructed by rectus abdominis (69%) and 10 by anterolateral thigh flaps (31%). Of 27 hypopharyngeal defects, 25 were restored by jejunum flaps (93%). Eleven of 12 mandibular defects were reconstructed by fibula flaps(92%). Four of 5 defects of skull base were reconstructed by rectus abodominis flaps (80%). The free flaps of rectus abodominis, anterolateral thigh, jejunum and fibula were most frequently used, accounting for 91%(78/86) of all flaps in head and neck defect reconstruction. Conclusion Although head and neck defects represent a complicated spectrum of subsites and loss, these four freeflaps can manage most reconstruction problems.
目的:探讨18F-FDG PET/CT在头颈部肿瘤的临床应用价值。方法:58例头颈部恶性肿瘤病例,男37例,女21例,年龄21~78岁。其中:牙龈癌3例,上颌窦癌2例,舌癌2例,腮腺癌1例,鼻咽癌24例,喉癌8例,甲状腺癌4例,原发灶不明的颈部淋巴结转移瘤14例。使用18F-FDG行全身PET/CT扫描,依据PET图像、CT图像和PET/CT融合图像及标准化摄取值(SUV)进行综合评价。结果:29例放疗患者中的11例拟行根治性放疗的患者,有4例改行姑息性放疗,8例重新勾画了放疗靶区及调整了放疗剂量,3例改行其它治疗;15例进行了放疗后的疗效评估;14例原发灶不明的颈部淋巴结转移瘤8例找到了原发灶。结论:PET/CT可以对头颈部恶性肿瘤进行准确的临床分期,精确勾画放疗的生物靶区,准确而快捷地确定肿瘤复发的位置与侵犯范围,在颈部不明原发灶转移瘤的应用中具有简便、快捷、无创和灵敏等临床特点。
ObjectiveTo evaluate the feasibil ity and effectiveness of suture ligation combined with super-wet tumescent technique to replace embolization before surgical resection of peri pheral arteriovenous malformations (AVMs) of the head and neck. MethodsBetween July 2007 and November 2010, 9 patients with peri pheral AVMs of the head and neck were treated, including 4 males and 5 females with a median age of 21 years (range, 8 months to 55 years). The causes were congenital malformation in 6 cases, trauma in 2 cases, and unknown origin in 1 case. The lesions were located at the frontotemporal region in 2 patients, cheek in 2 patients, occi pitocervical region in 2 patients, temporoparietal region in 1 patient, upper lip in 1 patient, and lower lip in 1 patient. The size of the AVMs lesions ranged from 2.2 cm×1.2 cm to 13.0 cm×10.0 cm. Of 9 cases, 8 were classified as Schobinger gradeⅡand 1 as gradeⅢ. The AVMs involved 2 to 7 main nutrient arteries, with a diameter range of 1.7-3.1 mm. At one-stage operation, AVMs was removed and direct suture, skin graft or flaps were used for repair in 6 cases; the skin was expanded at one-stage operation, and then AVMs removal and repair were performed at twostage operation in 3 cases. Before resection of AVMs, No.7 silk suture was used to l igate the main nutrient vessels, and then annular interrupted suture of soft tissue was performed with the silk sutures around the lesions, at least two rings. Tumescent anesthetic solution was injected into lesions, and super wet end-point achieved. ResultsPartial incision dehiscence occurred in 1 patient; the flaps and grafting skin survived, and primary healing of incision was obtained in the other patients. The mean operation time was 136 minutes (range, 42-367 minutes). The mean intraoperative blood loss was 268 mL (range, 15-1 000 mL). Only 1 patient received 3 units of blood transfusion. All patients were followed up for 4.2 years on average (range, 2 years to 6 years and 6 months); there was no recurrence case. The self-assessment cosmetic results were excellent or good in 5 cases and fair in 4 cases. ConclusionIntensive suture ligation followed by super-wet tumescent techniques might partially substitute preoperative embolization to facil itate surgical resection of peri pheral AVMs of the head and neck, due to simple operation and less bleeding.
ObjectiveThis study aimed to identify independent risk factors for head and neck squamous cell carcinoma (HNSCC) based on the surveillance, epidemiology, and end results (SEER) database and to develop a nomogram model for predicting patient survival outcomes. MethodsPatients diagnosed with HNSCC from 1975 to 2021 were selected from the SEER database. After applying inclusion and exclusion criteria, 2 271 patients were included and randomly divided into a training cohort and a validation cohort in a 7∶3 ratio. Independent prognostic factors were identified using LASSO regression, Cox regression analysis, and the Akaike information criterion (AIC). A nomogram model was constructed, and its discrimination and calibration were assessed using the concordance index (C-index), time-dependent area under the curve (time-dependent AUC), and calibration curves. The nomogram model was compared with the American Joint Committee on Cancer (AJCC) staging system using decision curve analysis (DCA), net reclassification index (NRI), and integrated discrimination improvement (IDI) to evaluate clinical utility and risk stratification performance. ResultsFive independent prognostic factors (age, marital status, N stage, tumor stage, and radiotherapy) were selected to build the nomogram model for HNSCC. The C-index values of the model were 0.731 4 (95%CI 0.714 5 to 0.748 5) in the training cohort and 0.735 1 (95%CI 0.709 1 to 0.761 0) in the validation cohort. The time-dependent AUC values were all above 0.7, indicating good discriminatory ability. Moreover, decision curve analysis showed that the nomogram model provided higher clinical net benefits at different threshold probabilities and performed better than the AJCC staging system in identifying high-risk patients. ConclusionThis study develops a nomogram model based on the SEER database to predict survival outcomes in patients with HNSCC. The model demonstrates high discrimination and clinical utility, offering a personalized prognostic tool for clinicians.
ObjectiveTo explore the clinical value of low-dose contrast agnet in CT angiography (CTA) for head and neck by SOMATOM Definition Flash CT.MethodsSixty consecutive patients with head and neck vessel diseases examined by CTA in the head and neck were chosen from West China Hospital of Sichuan University from March to July 2015, and then were randomly divided into two groups (the experimental group: n=30, 30 mL contrast medium; the control group: n=30, 50 mL contrast medium). Imaging post processing techniques included curved plannar reconstruction, volume rendering, and maximal intensity projection. CT values of the different level of carotid arteries (aortic arch, carotid bifuracation, and M1 segment of middle cerebral artery) were measured. The artifact of the remaining contract in the jugular vein and overall quality of the image were observed by two senior doctors using double blind method.ResultsAll the patients in the two groups completed CTA for head and neck successfully. The image qualities of the two groups satisfid clinical diagnostic requirements, and there was no difference in the image qualities between the two groups (P>0.05). The evaluation of venous pollution in the experimental group was lighter than that in the control group (P<0.05). The CT values of aortic arch, carotid bifuracation, and M1 segment of middle cerebral artery in the experimental group [(341.3±89.5), (391.0±103.7), (305.0±62.0) HU] were slightly lower than those in the control group [(437.3±83.7), (532.5±113.3), (396.6±93.1) HU], which were statistically significant (P<0.05).ConclusionLow-dose contrast in CTA for head and neck by SOMATOM Definition Flash CT can satisfy the clinical diagnostic requirements, and reduce the dose of contrast agent and venous pollution, with a good clinical value.
To realize the accurate positioning and quantitative volume measurement of tumor in head and neck tumor CT images, we proposed a level set method based on augmented gradient. With the introduction of gradient information in the edge indicator function, our proposed level set model is adaptive to different intensity variation, and achieves accurate tumor segmentation. The segmentation result has been used to calculate tumor volume. In large volume tumor segmentation, the proposed level set method can reduce manual intervention and enhance the segmentation accuracy. Tumor volume calculation results are close to the gold standard. From the experiment results, the augmented gradient based level set method has achieved accurate head and neck tumor segmentation. It can provide useful information to computer aided diagnosis.