Fundamental Frequency in Excised Human Larynges after Anterior Glottic Web Formation of Various Extents.

Objective: To determine the effect of vocal fold anterior web formation on fundamental frequency with a cadaveric excised larynx model.

Study Design: Experimental study with excised human larynges.

Setting: Academic tertiary care hospital.

Impact of Cricothyroid Muscle Contraction on Vocal Fold Vibration: Experimental Study with High-Speed Videoendoscopy.

Objectives: The aim of this study was to evaluate the effects of cricothyroid muscle contraction on vocal fold vibration, as evaluated with high-speed videoendoscopy, and to identify one or more aspects of vocal fold vibration that could be used as an irrefutable indicator of unilateral cricothyroid muscle paralysis.

Study Design: This was an experimental study employing excised human larynges.

Methods: Twenty freshly excised human larynges were evaluated during artificially produced vibration.

Improvement of vocal pathologies diagnosis using high-speed videolaryngoscopy.

Introduction The study of the dynamic properties of vocal fold vibration is important for understanding the vocal production mechanism and the impact of organic and functional changes. The advent of high-speed videolaryngoscopy (HSV) has provided the possibility of seeing the real cycle of vocal fold vibration in detail through high sampling rate of successive frames and adequate spatial resolution. Objective To describe the technique, advantages, and limitations of using HSV and digital videokymography in the diagnosis of vocal pathologies.

[Immunophenotyping and gene rearrangement analysis in lymphoid/lymphoproliferative disorders of the lungs].

Objective: To determine the usefulness, in routine practice, of using polymerase chain reaction to analyze B and T lymphocyte clonality in pulmonary tissue as a tool for the diagnosis of pulmonary lymphoproliferative disorders.

Methods: Immunohistochemistry and molecular gene rearrangement analysis were performed in order to assess 8 cases of lymphoid interstitial pneumonia (LIP) and 7 cases of pulmonary lymphoproliferative disorders.

Results: All 8 cases of LIP presented moderate to strong immunostaining for CD3, compared with only 2 cases of lymphoma and 1 case of pseudolymphoma (p = 0.