MSH6 and Cushing syndrome: Papillary Thyroid Carcinoma, Bilateral Macronodular Adrenal Cortical Disease-Related Cortisol Excess, and Femoral Enchondroma: A Novel Phenotype-Genotype Based on Next-Generation Sequencing (Variants of &lt;i&gt;APC, MSH6&lt;/i&gt;, and &lt;i&gt;CACNA1S&lt;/i&gt; Genes).