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Numerous interactions occur among fibroblasts, keratinocytes and immune cells during wound healing. The release of cytokines supports formation of granular tissue which then fills the wound. A chronic wound appears when this complex process is disrupted. We can see this problem in patients with diabetes. Granular tissue is very similar to the stroma of solid tumors. This work is focused on parallels between a healing wound and tumor. It aims to clearly describe the regulation of both processes. New knowledge in this field can contribute to revealing new therapeutic possibilities in chronic wounds and solid tumors. Keywords: squamous cell carcinoma – Head and neck tumors – healing – tumor microenvironment

Surgical and outpatient care of a patient with ear disease is an integral part of otorhinolaryngology. It includes a wide range of procedures in the region of the external auditory canal, middle ear and other parts of the pyramid bone with various indications. The objective increase in the number of ear procedures at the department of the authors was the impulse to map the situation of ear surgery in the Czech Republic. Data were collected in the period from January 2020 to August 2020, using a questionnaire, which was sent to the heads of all ENT departments in the Czech Republic. The yield of the questionnaire was 100%. Overall 80% of all ENT departments perform ear surgeries, of which almost 85% perform pediatric ear surgeries too. The maximum of ear surgery proceeds in the university departments where an increase in the number of operated patients has been observed in the last 10 years. These departments also cover specialized procedures such as cochlear implantations and more extensive surgeries on the temporal bone. Keywords: ear surgery – ear diseases – hearing rehabilitation

Objectives This study aimed to assess vestibular function in 39 patients who underwent neurectomy for vestibular schwannoma. Method Semicircular canal reactivity was measured by video head-impulse test using high-frequency passive head acceleration. Response gain was calculated as a ratio between the areas under the eye-velocity curve and the head-velocity curve. Statistical analysis Student t-test was used for to compare quantitative variables. ANOVA was used to test inter-group differences in categoric variables. Results In all cases, surgery-side gain on head impulse test was low, with increased gain asymmetry. A subgroup of 7 patients (18%) showed relatively high gain in vestibulo-ocular reflex on the surgery side. Caloric reaction was absent in all cases. These findings indicate that residual vestibular function can be conserved following vestibular schwannoma extirpation. Conclusion Cases with moderate vestibulo-ocular reflex gain were a subgroup with partial conservation of vestibular nerve fibers. Whether this is a predictor of better functional prognosis remains to be elucidated. Higher gain correlated with less extensive surgery and sparing of the inferior vestibular nerve. Low gain correlated with complete vestibular neurectomy. This information may guide rehabilitation strategy following surgery.

Hearing loss is the most frequent sensory disorder and is genetically extremely heterogeneous. By far the most frequent cause of nonsyndromic autosomal recessive hearing loss (AR-NSHL) are biallelic pathogenic mutations in the GJB2 gene causing DFNB1. The worldwide search for the second most common type of AR-NSHL took almost two decades. Recently reported alterations (mostly deletions) of the STRC gene, also named DFNB16, seem to be the second most frequent cause of AR-NSHL. Genetic testing of STRC is very challenging due to the highly homologous pseudogene. Anecdotal evidence from single patients shows that STRC mutations have their typical audiological findings and patients usually have moderate hearing loss. The aim of this study is to discover if audiological findings in patients with biallelic pathogenic mutations affecting STRC have the characteristic features and shape of audiological curves and if there are genotype/phenotype correlations in relation to various types of STRC mutations. Eleven hearing loss patients with pathogenic mutations on both alleles of the STRC gene were detected during routine genetic examination of AR-NSHL patients. Audiological examination consisted of pure tone audiometry, stapedial reflexes, tympanometry and otoacoustic emission tests. The threshold of pure tone average (PTA) was 46 dB and otoacoustic emissions were not detectable in these DFNB16 patients. All patients were without vestibular irritation or asymmetry. Moderate sensorineural hearing loss is typical for DFNB16-associated hearing loss and there are no significant differences in audiological phenotypes among different types of mutations affecting STRC.

Aberrant regulation of the cell cycle is a typical feature of all forms of cancer. In head and neck squamous cell carcinoma (HNSCC), it is often associated with the overexpression of cyclin D1 (CCND1). However, it remains unclear how CCND1 expression changes between tumor and normal tissues and whether human papillomavirus (HPV) affects differential CCND1 expression. Here, we evaluated the expression of D-type cyclins in a cohort of 94 HNSCC patients of which 82 were subjected to whole genome expression profiling of primary tumors and paired normal mucosa. Comparative analysis of paired samples showed that CCND1 was upregulated in 18% of HNSCC tumors. Counterintuitively, CCND1 was downregulated in 23% of carcinomas, more frequently in HPV-positive samples. There was no correlation between the change in D-type cyclin expression and patient survival. Intriguingly, among the tumors with downregulated CCND1, one-third showed an increase in cyclin D2 (CCND2) expression. On the other hand, one-third of tumors with upregulated CCND1 showed a decrease in CCND2. Collectively, we have shown that CCND1 was frequently downregulated in HNSCC tumors. Furthermore, regardless of the HPV status, our data suggested that a change in CCND1 expression was alleviated by a compensatory change in CCND2 expression.

Ear pain, otalgia, can have many etiologies. Some of these conditions, e.g. impacted ear wax, can be solved easily directly in the outpatient office. On the other hand, inflammations and its complications can also endanger patients life. Situation is complicated due to secondary otalgia, when the source of pain is localized in another body region, e.g. oropharynx. Stubbing pain in the ear should be in this case perceived as a warning sign, because it could be caused by spread of primary disease to the parapharynx. Aim of this paper is to provide a summary of the most often causes of ear pain correlated with their typical clinical features, It should help to recognize serious conditions, which can endanger patient´s life.

Similarly to other types of malignant tumours, the incidence of head and neck cancer is increasing globally. It is frequently associated with smoking and alcohol abuse, and in a broader sense also with prolonged exposure to these factors during ageing. A higher incidence of tumours observed in younger populations without a history of alcohol and tobacco abuse may be due to HPV infection. Malignant tumours form an intricate ecosystem of cancer cells, fibroblasts, blood/lymphatic capillaries and infiltrating immune cells. This dynamic system, the tumour microenvironment, has a significant impact on the biological properties of cancer cells. The microenvironment participates in the control of local aggressiveness of cancer cells, their growth, and their consequent migration to lymph nodes and distant organs during metastatic spread. In cancers originating from squamous epithelium, a similarity was demonstrated between the cancer microenvironment and healing wounds. In this review, we focus on the specificity of the microenvironment of head and neck cancer with emphasis on the mechanism of intercellular crosstalk manipulation for potential therapeutic application.