Concordance study between one-step nucleic acid amplification and morphologic techniques to detect lymph node metastasis in papillary carcinoma of the thyroid.

Tumor resection in papillary thyroid carcinoma (PTC) is often accompanied by lymph node (LN) removal of the central and lateral cervical compartments. One-step nucleic acid amplification (OSNA) is a polymerase chain reaction-based technique that quantifies cytokeratin 19 (CK19) messenger RNA copies. Our aim is to assess the value of OSNA in detection of LN metastases in PTC, in comparison with imprints and microscopic analysis of formalin-fixed, paraffin-embedded (FFPE) tissue.

Ametropias in school-age children in Fada N'Gourma (Burkina Faso, Africa).

Purpose: To assess epidemiological aspects of refractive errors in school-age children in Burkina Faso (west-central Africa).

Methods: A total of 315 school children (ranging from 6 to 16 years of age and belonging to different ethnic groups) taken at random from two urban schools in eastern Burkina Faso were examined to assess their refractive error, which was determined by non-cycloplegic retinoscopy with optical fogging. The standard Refractive Error Study in Children (RESC) definitions of refractive errors were used: myopia ≤-0.