Association between head and neck cancer and sexually transmitted diseases: a Danish nationwide,case-control study

Abstract

Background: An association between sexually transmitted diseases (STDs) and occurrence of head and neck cancer (HNC) is proposed.

Aims/objectives: We aimed to determine the association between selected STDs (syphilis, gonorrhoea, HIV) and HNC.

Materials and methods: Patients diagnosed with HNC in Denmark between 1978 and 2014 identified through the Danish Cancer Registry were included. Patients were age- and sex-matched in a 1:10 ratio with general population controls. Uni- and multivariate analyses were performed using the Cox regression model to assess the correlation between STD and HNC.

Results: A total of 39,405 HNC patients (63% men; 63.0 years at HNC diagnosis) and 393,238 controls were included. STD in HNC patients was 0.27%, vs. 0.11% in controls. Patients with cancer of the upper airways had a significantly higher prevalence of an STD prior to the HNC compared to controls. Most HNC patients with a prior STD (64.1%) developed the HNC within five years after the STD diagnosis.

Conclusions: Although the studied STDs are rare, patients with cancer of the upper aerodigestive tract more commonly had a previous diagnosis of STD compared to controls. The study promotes the hypothesis that a causal link exists between STD and HNC.     

Ventricular bigeminy (parasystole or reciprocal rhythm) in atrioventricular rhythm

In atrioventricular rhythm the normal auricular pacemaker is inhibited and there is uncovered a secondary center from which impulses activate the ventricle and, in uncompleted cases, the auricle as well. In certain cases, however, impulses from the secondary center are not conducted to the auricle. In such instances auricular escape occurs, the auricular center of highest automaticity becoming the pacemaker for the auricle. The rhythmicity of such a secondary auricular center is subject to the same influence that may affect other centers of impulse formation. In some cases the retrograde blocking of impulses from the ventricular center is incomplete, and the auricular pacemaker is discharged prematurely by those impulses which reach it just before the completion of its automatic period. Impulses from this pacemaker pass not only to the auricle but also toward the ventricle and produce premature ventricular contractions when not interfered with by refractory tissue. Beating of the ventricle in response to impulses both from the ventricular pacemaker and from the auricular center in such cases constitutes parasystole.Ten cases were studied, three of which are reported in detail. Reciprocal rhythm as an explanation of the records in these cases is considered but evidence against this interpretation is presented. It appears that cases of simple A-V rhythm, of so-called reciprocal rhythm, and of parasystole are fundamentally related; the precise mechanism in a given instance being determined by the state of retrograde conductivity from the ventricular pacemaker.These cases occur under circumstances associated with sinus depression and lowered conductivity. Digitalis in some instances appears to be a contributory factor.     

Über die Blutversorgung des Gehirns

Ohne Zusammenfassung     

Zur Analyse der Muskelcontraction

Ohne Zusammenfassung     

EAACI/GA2LEN/EDF guideline: definition, classification and diagnosis of urticaria

This guideline is the result of a consensus reached during a panel discussion at the 2nd International Consensus Meeting on Urticaria, Urticaria 2004, a joint initiative of the European Academy of Allergology and Clinical Immunology Dermatology Section and the European Union (EU)-funded network of excellence, GA2LEN. It covers the definition and classification of urticaria, taking into account the recent progress in identifying causes, eliciting factors and pathomechanisms of this disease. We have outlined useful diagnostic approaches for different subtypes of urticaria. This guideline was, in addition, accepted by the European Dermatology Forum (EDF) and was formally approved by the European Union of Medical Specialists (UEMS).