Management of intra-operative cerebrospinal fluid leak following endoscopic trans-sphenoidal pituitary surgery.

OBJECTIVE: Cerebrospinal fluid leakage is the most common complication of endoscopic trans-sphenoidal pituitary surgery. However, there is no uniformly accepted way of managing this complication when it occurs intra-operatively. This paper describes a quick, simple technique, involving layered fibrin glue and gelatin sponge, which does not compromise post-operative patient follow up. METHOD: Retrospective review of all endoscopic pituitary surgery cases conducted at a single institution since the introduction of this technique in 2002. RESULTS: A total of 120 endoscopic pituitary operations were performed (96 primary procedures and 24 revisions). All intra-operative cerebrospinal fluid leaks were managed using the described method, with a failure rate of 3.6 per cent. The overall post-operative leakage rate was 1.7 per cent. CONCLUSION: This simple, conservative technique avoids the need for further dissection and the use of non-absorbable foreign material, and has a low incidence of post-operative cerebrospinal fluid leakage.

Spontaneous cervical surgical emphysema following childbirth.

OBJECTIVE: We report a case of post-partum surgical cervical emphysema, which is a rare but well recognised complication of labour. By reporting the first case in the ENT literature, we aim to raise awareness of this complication, particularly amongst trainees, to ensure that patients are managed most appropriately. CASE REPORT: A 36-year-old, primigravida woman developed neck swelling and odynophagia post-partum. Surgical cervical emphysema was palpated, with further examination excluding pneumomediastinum and pneumothorax. The patient was managed conservatively, with complete resolution of symptoms within a week. CONCLUSIONS: Surgical cervical emphysema, pneumothorax and pneumomediastinum are all well recognised post-partum complications. The vast majority of cases do not present with respiratory or cardiac compromise and can be appropriately managed conservatively, with expectation of resolution in a fortnight. There is no evidence that such patients are at increased risk during subsequent pregnancies.

Foreign body mimicking a nasal bone fracture.

Nasal foreign bodies are common in young children and are typically the result of intranasal placement by the child. The authors report a case of an extranasal foreign body in an adult, which presented as a nasal fracture following trauma to the nose. This uncommon presentation, previously unreported in the literature, highlights the importance of careful history taking in cases of nasal trauma and of thorough wound exploration if any penetrative injury is found.

Major histocompatibility complex class I expression in human tonsillar and laryngeal epithelium.

Understanding the immunological structure of the upper aerodigestive tract is important for analysing the interaction between incident challenges, such as human papillomavirus infection, and disease, particularly head and neck cancer. We have shown previously that tonsillar and laryngeal epithelium express major histocompatibility complex (MHC) class II locus products, but that expression of human leucocyte antigen (HLA)-DQ is reduced compared to HLA-DR. This may confer a decreased repertoire of presented T cell epitopes generated by the processing of exogenous peptides in upper airway mucosa. To determine whether the peptide repertoire presented by MHC class I loci varies in stratified squamous epithelium, laryngeal and tonsillar biopsies were taken from 19 otherwise healthy patients (M : F 6 : 13, 16-64 years). Quantitative immunofluorescence microscopy, using antibodies to MHC class I alpha-chain (pan-locus specific, HLA-A, HLA-B + C) and beta(2)-microglobulin, showed lower expression of the alpha-chain in laryngeal and tonsillar epithelium than in either lamina propria (tonsil 73% versus 89%, P < 0.0001; larynx 68% versus 85%, P < 0.005). Within the epithelium itself, the intensity of alpha-chain expression decreased from the basal to apical layers. In paired squamous epithelia from the two sites, alpha-chain expression was significantly higher in the tonsil compared to the larynx (79% versus 62%, P < 0.05). We suggest that these findings reflect functional stratification of these epithelia with the superficial layer, most exposed to incident challenges, less equipped to present antigens to conventional T cells. This may affect immunosurveillance directed at viral and tumour-related epitopes in the upper airway.

Human papillomavirus and head and neck cancer: a systematic review and meta-analysis.

It has been suggested that the link between human papillomavirus (HPV) and head and neck squamous cell carcinoma (HNSCC) is specific to carcinoma of the tonsil. We systematically reviewed studies that tested for HPV16 exposure in anatomically defined sites in the head and neck and a control group. The association between HPV16 and cancer was strongest for tonsil (OR: 15.1, 95% CI: 6.8-33.7), intermediate for oropharynx (OR: 4.3, 95% CI: 2.1-8.9) and weakest for oral (OR: 2.0, 95% CI: 1.2-3.4) and larynx (OR: 2.0, 95% CI: 1.0-4.2). To investigate heterogeneity, further stratification by method of HPV16 detection, suggested that variation in the magnitude of the HPV-cancer association with cancer site was restricted to studies using ELISA: among studies using PCR, the magnitude of the summary odds ratios was similar across the four sites. The association between HPV16 infection and HNSCC in specific sites suggests the strongest and most consistent association is with tonsil cancer, and the magnitude of this association is consistent with an infectious aetiology. However, the method of viral detection may be an important source of heterogeneity. Resolution of this issue will require further studies using both methods, examining associations separately in different sites.

Epistaxis: an update on current management.

Epistaxis is one of the commonest ENT emergencies. Although most patients can be treated within an accident and emergency setting, some are complex and may require specialist intervention. There are multiple risk factors for the development of epistaxis and it can affect any age group, but it is the elderly population with their associated morbidity who often require more intensive treatment and subsequent admission. Treatment strategies have been broadly similar for decades. However, with the evolution of endoscopic technology, new ways of actively managing epistaxis are now available. Recent evidence suggests that this, combined with the use of stepwise management plans, should limit patient complications and the need for admission. This review discusses the various treatment options and integrates the traditional methods with modern techniques.

Spontaneous enophthalmos: silent sinus syndrome.

Spontaneous enophthalmos unrelated to trauma or surgery is rare. The term 'silent sinus syndrome' has been used to describe this process where, in particular, there is an absence of any sino-nasal symptoms. The enophthalmos and hypoglobus that occurs in these subjects is caused by atelectasis of the maxillary antrum, which itself appears to be due to chronic maxillary hypoventilation. We report a case of silent sinus syndrome that arose following insertion of a nasogastric tube. Whilst acute paranasal sinusitis is a well-described sequela of nasal intubation, this association with a rare, and as yet unexplained, phenomenon may go some way to explain its aetiology.