Metastatic carcinoma in the neck: a clinical computerized tomography scan and ultrasound study

Use of dynamic MRI during swallowing to assess carotid artery invasion by neck metastasis

BACKGROUND

The effectiveness of dynamic MRI in evaluating the relationship between metastatic lymph nodes and the carotid artery was investigated.

METHODS

Thirty-two patients with metastatic lymph nodes, possibly adherent to the carotid artery, were evaluated with dynamic MRI before surgery. Consecutive axial and oblique images were obtained during swallowing. The displacement rate of the target carotid artery to the contralateral carotid artery and the low-intensity stripe between the metastatic lymph nodes and the carotid artery wall were compared with the surgical findings.

RESULTS

A displacement rate > 50% indicated resectable metastatic lymph nodes. Low-intensity stripe was present in 65% of patients and indicated no invasion; 82% of patients without low-intensity stripe had resectable metastatic lymph nodes. The others without low-intensity stripe required carotid artery resection due to malignant invasion. The accuracy rate, sensitivity, and specificity were 78%, 83%, and 100%, respectively.

CONCLUSION

Dynamic MRI during swallowing is useful for assessing suspected carotid artery involvement in patients with metastatic lymph nodes to achieve maximal safe resection.

Variation in surgical methods used for total laryngectomy in Australia

Deglutition disorders (dysphagia) are common following total laryngectomy. As the aetiology of the disorder is poorly understood, its incidence is probably under-estimated. Dysphagia may result from many factors, including the type of laryngectomy surgery employed and the use of adjuvant treatments (e.g. radiotherapy and chemotherapy). Dysphagia may also be compounded by other co-morbid factors, such as ageing and depression.

Aim:

To investigate the methods of surgical closure used by Australian ENT and head and neck surgeons after undertaking total laryngectomy surgery.

Method:

In order to audit surgical variation, 56 short questionnaires were sent to all Australian ENT and head and neck surgeons who were registered members of the Australia and New Zealand Head and Neck Society. Twenty-eight questionnaires (50 per cent) were completed and returned.

Results:

Respondents reported using a variety of different reconstructive methods after total laryngectomy surgery. Specifically, there were differences in the type and levels of pharyngeal closure employed and the suturing techniques used.

Conclusion:

Currently, there is no scientific evidence to direct surgeons to the optimal pharyngeal reconstruction technique(s) ensuring for good swallowing results post-laryngectomy. An analysis of the effect of surgical reconstruction technique on laryngectomees' post-operative swallowing ability is needed, in order to provide evidence to determine optimal surgical techniques.

Tissue characterization of locoregionally advanced head-and-neck squamous cell carcinoma (HNSCC) using quantified ultrasonography: A prospective phase II study on prognostic relevance

BACKGROUND AND PURPOSE

Information on a patient's prognosis is important for the clinical decision-making process. This study explored the capacity of quantitative ultrasound imaging to increase prognostic information.

MATERIALS AND METHODS

High-resolution B-scan and colour-coded duplex-sonography of the neck was prospectively applied to 50 HNSCC-patients stage IVA-B 05/99-01/02 before definite radio-(chemo-)therapy. Every lymph node >1.5 cm was scored for the following Malignancy Criteria: Inhomogeneity, Surface-irregularity, Missing hilar sign, Spherical form, Matting, Aberrant intranodal vessels, Infiltration of surrounding tissue, Intranodal cystic necrosis.

RESULTS

Median Overall Survival (OS) was 1 year. High MMCC (Maximal Malignancy Criteria Count in a single node) predicted a poor outcome with a median OS of 8.1 months (MMCC=7-8, n=24) vs. 24.7 months for low MMCC (1-6, n=26, p=0.0004, logrank). Estimated 1- and 3-year-OS was 25% and 8% for high vs. 69% and 41% for low MMCC. Ten out of eleven living patients (follow-up 2.3-5.3 years) had a low MMCC. Of the clinical parameters determined, only pre-treatment hemoglobin levels <12 g/dl and treatment less radical than chemoradiation to 70 Gy predicted poor OS (univariate p=0.04 and 0.02, respectively). In multivariate Cox analysis, MMCC continued to significantly predict for OS (p=0.002) and Disease-Free Survival (p=0.002).

CONCLUSIONS

Quantification of nodal ultrasonography offers valuable prognostic information for the conservative management of HNSCC.

The relationship of cervical lymph node metastases to primary sites of carcinoma of the upper aerodigestive tract: a pathological study

BACKGROUND

Therapeutic and elective dissection of the neck is accepted management in the treatment of squamous cell carcinoma (SCC) of the upper aerodigestive tract (UADT). Accurate histological assessment of the levels of involvement of cervical metastatic spread from different sites within the UADT has allowed the increasing use of less than radical procedures, with associated reduced morbidity.

METHODS

A total of 168 necks in 126 patients were examined pathologically. All levels were identified at surgery, marked and oriented by pinning the specimen to a cork board, and examined histologically. A total of 114 necks had a comprehensive neck dissection (CND) in which all levels were dissected. The number and level of involvement and the occult rate (114 necks) for each primary site was assessed. Of the total of 168 necks, 80 had pathologically involved nodes, and the number with greater than one node involved (N2b) was compared for each primary site. The number with extracapsular spread for each nodal staging was also examined.

RESULTS

The sites of primary SCC were the oral cavity, oropharynx, hypopharynx, supraglottic and glottic larynx. In those patients with a primary in the oral cavity, no patient had level 5 involvement, but in two patients (7%) level 4 was involved. In the oropharynx, level 1 and 5 were involved in two patients (11%) each. In the hypopharynx, level 1 was not involved in any patient, however, level 5 contained metastasis in 7 (23%). In the supraglottic larynx, level 1 was involved in one (4%) patient and level 5 was involved in three (11%). In the glottis only one patient had bilateral multiple nodes which included level 5. In no case was level 5 involved without positive nodes in other levels. The occult rate for each primary site was 45%, 22%, 77%, 54% and 29%, respectively. The multiple node rate in the 80 necks with positive nodes was, respectively, 31%, 54%, 66%, 45% and 40%. All patients with a node larger than 3 cm had extracapsular spread of tumour.

CONCLUSIONS

The level of nodal involvement and therefore the type of neck dissection should be determined by the site of the primary within the UADT and the presence or absence of nodes at surgery. There is a high number (39-66%) of pathologically involved necks which have multiple nodes and also nodes with extracapsular spread of tumour, which may influence the decision for postoperative radiotherapy.

Differentiation between benign and metastatic cervical lymph nodes with ultrasound

OBJECTIVE

The differentiation between benign and metastatic lymph nodes with ultrasound (US) is based primarily on the evaluation of size, shape, margin and internal echo structure. The aim of this study is to determine whether these parameters are reliable indicators and to correlate internal echo structure and histopathological findings.

MATERIALS AND METHODS

Seventy-one nodes in 21 patients with pathologically proven oral squamous cell carcinoma were examined. The shortest diameter, the short/long diameter ratio (S/L ratio), margins and internal echo structure of the lymph node were evaluated by US. The internal echo structure was divided into six patterns: homogeneous hypoechoic, homogeneous hyperechoic, heterogeneous, eccentric hyperechoic, centric hyperechoic and anechoic pattern. In addition, internal echo structure was correlated with histopathological findings.

RESULTS

In 71.4% of the metastatic nodes, the shortest diameter was more than 10 mm and the S/L ratio was higher than that of benign nodes (average 0.71). Eleven (84.6%) of the 13 lymph nodes with irregular margins were metastatic. Heterogeneous and anechoic patterns were observed in metastatic nodes, whereas homogeneous hypoechoic and eccentric hyperechoic patterns were present in benign nodes. On ultrasonography with the corresponding histopathological findings, echogenic areas in the homogeneous hyperechoic, heterogeneous and centric hyperechoic patterns of metastatic nodes proved to be necrosis or fibrosis. Eccentric hyperechoic areas in benign nodes corresponded to the hilus and surrounding fatty tissue.

CONCLUSIONS

The shortest diameter, S/L ratio, margin and internal echo structure were considered to be critical indicators to differentiate between benign and metastatic nodes. Secondary changes caused by tumour infiltration, necrosis, or fibrosis should be assessed when metastatic lymph nodes are differentiated from benign ones by internal echo structure.