Thyroid paragangliomas and inferior laryngeal or subglottic paragangliomas should be included under the term "paragangliomas" of the inferior laryngeal paraganglion. These tumors are slow growing, benign, hypervascular, and much more common in middle-aged women. Immunohistochemistry is essential for its diagnosis. Open, conservative surgery is the treatment of choice.

The patients in this study with ALDH1 + tumours had better outcomes than their counterparts with ALDH1- tumours. This finding suggests that not all CSCs are resistant to conventional cancer treatments. It may also imply that new methods of correctly identifying these cells are needed.

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