MONDO_0010354 (Allan-Herndon-Dudley syndrome) is a syndrome with neuromuscular involvement characterized by infantile hypotonia, muscular hypoplasia, spastic paraparesis with dystonic/athetoic movements, and severe cognitive deficiency. Also known as: AHDS, ALLAN-Herndon syndrome, MCT8 deficiency, MCT8-Specific Thyroid Hormone Cell Transporter Deficiency, MCT8-specific thyroid hormone cell Membrane transporter deficiency, X-linked intellectual disability-hypotonia syndrome, monocarboxylate transporter 8 deficiency.