All-sky camera system providing high temporal resolution annual time series of irradiance in the Arctic.

The ArcLight observatory provides hourly continuous time series of light regime data (intensity, spectral composition, and photoperiod) from the Arctic, Svalbard at 79° N. Until now, no complete annual time series of biologically relevant light has been provided from the high Arctic due to insufficient sensitivity of commercial light sensors during the Polar Night. We describe a camera system providing all-sky images and the corresponding integrated spectral irradiance () in energy or quanta units, throughout a complete annual cycle.

Multicenter experiences in temporal bone cancer surgery based on 89 cases.

Objective: To present outcomes of extensive surgery: lateral, subtotal, total petrosectomies in patients with temporal bone invasion resulting from specific primary cancers.

Study Design: Retrospective case review.

Setting: Four tertiary referral centers.

Sialendoscopy and sialendoscopically-assisted operations in the treatment of lithiasis of the submandibular and parotid glands: our experience of 239 cases.

We present the results of treatment of sialolithiasis of the submandibular and parotid glands using sialendoscopy and sialendoscopy-assisted surgery. Between 2009-2013, 397 consecutive patients (mean (range) age 48 (18-76) years) were treated for obstructive diseases of the major salivary glands (sialolithiasis n=239, 175 submandibular and 64 parotid). In a total of 175 patients with 191 stones in the submandibular gland treated by endoscopic retrieval or surgical release, 149 patients (85%) were rendered free of stones (by sialendoscopy alone n=82, and sialendoscopy with operation n=67) Twenty patients (11%) had residual stones and 6 patients (4%) required excisionof the gland.

Treatment of Parotid Malignancies—10 Years of Experience.

Purpose: Operative treatment is the main treatment option for parotid gland tumors. The purpose of this study was to present the authors' experience in the operative treatment of parotid gland malignant tumors, especially regarding feasibility and techniques in the most advanced cases.

Materials And Methods: This is a retrospective cohort study of parotid malignancies.

Sialendoscopy - a diagnostic and therapeutic approach subjectively rated by patients.

Introduction: Sialendoscopy is a miniinvasive procedure which shows the excretory ducts of the salivary glands.

Aim: To evaluate patient satisfaction with sialendoscopy in submandibular and parotid gland sialolithiasis.

Material And Methods: The study group included 100 consecutive patients with sialolithiasis, treated by means of sialendoscopy.

Sonoelastography--a useful adjunct for parotid gland ultrasound assessment in patients suffering from chronic inflammation.

Background: Shear wave elastography (SWE) is widely used in breast, liver, prostate and thyroid evaluations. Elastography provides additional information if used to assess parotid gland pathology. We assessed parotid glands by means of SWE to compare the parenchyma properties in different types of inflammation.

Shear wave elastography: a new noninvasive tool to assess the intensity of fibrosis of irradiated salivary glands in head and neck cancer patients.

The aim of the study was to assess salivary gland parenchyma by means of sonoelastography in patients irradiated for head and neck squamous cell carcinoma (HNSCC). The studied group consisted of 52 patients after radiotherapy (RT) and 54 healthy volunteers. All of the former were treated for advanced larynx (40), oropharynx (9), or maxilla (3) squamous cancers and suffered from chronic dryness.

Fully endoscopic resection of juvenile nasopharyngeal angiofibroma - own experience and clinical outcomes.

Objectives: The treatment of choice in juvenile nasopharyngeal angiofibroma (JNA) is surgery - nowadays endoscopic techniques. The aim of the study was to present the results of endoscopic treatment in patients diagnosed with juvenile angiofibroma.

Materials And Methods: In this retrospective case series, 10 patients with a diagnosis of JNA treated at the Department of Otolaryngology of the Medical University in Poznań from 2006 to June 2013 were included.

Radiotherapy induced xerostomia: mechanisms, diagnostics, prevention and treatment--evidence based up to 2013.

Definition and prevalence of xerostomia were shortly presented. Radiosensitivity of the salivary glands, mechanism, diagnostics, and possible prediction methods of the intensity of xerostomia in the pre-radiotherapy period are widely discussed. Prevention of xerostomia: salivary gland sparing radiotherapy, cytoprotective agents, preservation by stimulation with cholinergic muscarinic agonists, surgical transfer of submandibular glands according to ASCO Management Guidelines and Quality of Life Recommendations were cited.

Stensen's duct injuries: the role of sialendoscopy and adjuvant botulinum toxin injection.

Introduction: Stensen's duct injuries are uncommon but troublesome sequelae of facial surgery or other external traumas.

Aim: To investigate the feasibility of sialendoscopic control of Stensen's duct in iatrogenic injuries and the efficiency of botulinum toxin adjuvant therapy.

Material And Methods: In 2008 and 2010, 5 patients with parotid sialoceles or fistulas, infrequent complications after plastic surgery or trauma, were treated in a single institution, Poznan University of Medical Sciences ENT Department.

Value of open horizontal glottectomy in the treatment for T1b glottic cancer with anterior commissure involvement.

Background: The aim of the study was to evaluate the treatment outcomes in the group of 108 T1b glottic cancer patients with the anterior commissure involvement treated with open horizontal glottectomy and to compare them with transoral laser microsurgery (TLM) or primary radiotherapy (XRT) results from the literature review.

Methods: Status of surgical margins, local and nodal recurrence, organ preservation and survival rates, functional outcomes were major end points of interest.

Results: Recurrence rate was 16.

Algorithm changes in treatment of submandibular gland sialolithiasis.

Our research was conducted to determine the algorithm changes during the treatment of submandibular sialolithiasis. Two time periods were compared between 2004-2008 and 2009-2012. The turning point was December 2008, when sialendoscopy procedure was introduced.

[MALT-type parotid lymphoma--a case report and the review of the literature].

Primary lymphomas of the salivary glands are rare. It is estimated that they constitute no more than 5% of all lymphomas in different locations. The most common subtype developing in parotid glands is marginal zone B-cell mucosa associated lymphoid tissue type lymphoma (MALT) that belongs to a group of low-grade tumours.

[The sonoelastography of major salivary glands in chosen pathological conditions].

Introduction: Sonoelastography is a novel technique useful in noninvasive assessment of tissue elasticity. This method was found to date to be useful in noninvasive differentiation of benign and malignant lesions of multiple organs: thyroid gland, liver, prostate and breast. Elastograms were scored upon conventional subjective color scale and the detailed stiffness values in kPa were collected.

[Sialendoscopy in treatment of sialolithiasis--our own experience based on group of 95 patients].

Objectives: The introduction of minimally invasive surgical procedures has significantly reduced the rate of major salivary gland removal due to sialolithiasis. The aim of the analysis was to assess the effectiveness of sialoendoscopy and combined approach in most difficult cases.

Material And Methods: prospective study, tertiary university centre (Department of Otorhinolaryngology, Head and Neck Surgery, Poznan), between XII 2008 and V 2012, 207 sialendoscopies were performed in 197 patients.

Is sonoelastography a helpful method for evaluation of parotid tumors?

Sonoelastography is a novel technique, useful in a noninvasive assessment of lesions in multiple organs. The aim of the study was to examine whether the combination of conventional ultrasonography (US) with sonoelastography might improve the reliability of parotid tumor evaluation. Fourty-three consecutive patients with parotid tumors were surgically treated at a single tertiary center at the Department of Otolaryngology, Head and Neck Surgery.

[Analysis of recurrence and treatment results of parotid gland non-malignant tumors with particular focus on pleomorphic adenoma].

Unlabelled: The aim of the study was to assess the correlation between non-malignant parotid gland tumors recurrence and patient related parameters (age, gender, duration of complaints), type of tumor (histological pattern, the tumor diameter, primary localization in superficial or a deep lobe) and the treatment methods. The endpoint of the analysis was to come up with the presentation of the treatment methods applied to pleomorphic adenoma.

Material And Methods: between 1997 and 2006, 675 patients with non-malignant tumors of parotid gland were treated in a single institution, the tertiary center for ENT at the University Department in Poznań.

PRAME expression in head and neck cancer correlates with markers of poor prognosis and might help in selecting candidates for retinoid chemoprevention in pre-malignant lesions.

Objectives: PRAME (Preferentially Expressed Antigen in Melanoma) is a tumor-associated antigen recognized by immunocytes, and it induces cytotoxic T cell-mediated responses in melanoma. PRAME expression in tumors interferes with retinoic acid receptor (RAR) signaling thus promoting tumor progression. Here, we study PRAME expression in head and neck squamous cell carcinoma (HNSCC) to determine its potential clinical significance.

Stenoses of the salivary ducts-sialendoscopy based diagnosis and treatment.

Our aim was to analyse the nature of a sialendoscopy-based classification and present its use in the treatment of stenoses of Wharton's and Stensen's ducts. The classification of stenoses of Wharton's duct has not been published before. We did 133 sialendoscopies in 114 patients who presented with possible obstruction of the ducts to the tertiary centre for ENT at the University Department in Poznań.

Sialoendoscopy and combined approach for the management of salivary gland stones.

Unlabelled: The introduction of minimally invasive surgical procedures has significantly reduced the rate of major salivary gland removal due to sialolithiasis. The aim of this study is to assess the effectiveness of sialoendoscopy, rate of salivary fistula or natural ostium stenosis in parotid sialolithiasis treatment. The endpoint was to analyse the efficiency of a combined transcutaneous and endoscopic approach in the removal of refractory and impacted stones in most difficult cases.

Head and neck paragangliomas: clinical and molecular genetic classification.

Head and neck paragangliomas are tumors arising from specialized neural crest cells. Prominent locations are the carotid body along with the vagal, jugular, and tympanic glomus. Head and neck paragangliomas are slowly growing tumors, with some carotid body tumors being reported to exist for many years as a painless lateral mass on the neck.

The presence of facial nerve weakness on diagnosis of a parotid gland malignant process.

The objectives of this article are to assess the frequency and significance of facial paralysis and undiagnosed nerve infiltration in patients with parotid malignancies. 103 patients with parotid gland malignancies were treated in a single institution, the tertiary center for ENT at the University Department in Poznan between 1996 and 2006. Facial palsy at the initial presentation was found in 32 patients.

[A proposal for the classification of chronic sialadenitis of the major salivary glands with current diagnostic and treatment schedule].

Unlabelled: Approximately 5% of patients visit the ENT doctors with major salivary gland complaints. Chronic sialadenitis is one of the major disorders that can cause salivary hypofunction and correct diagnosis and management is essential for its recovery. The classification of this pathological condition have changed in the past eight decades and nowadays was revised and modified, for new diagnostic (high resolution ultrasonography, CT and MR sialography and sonoelastography) and therapeutic methods (sialoendoscopy) were introduced.