Supraglottic larynx | Superior limit | Inferior limit | Ipsilateral limit | Contralateral limit | Anterior limit | Posterior limit |
---|---|---|---|---|---|---|
CTV 1 | GTV + 0.5-1 cm margin | idem | Idem | idem | Idem | idem |
CTV 2 | Epiglottis, base of tongue (1Â cm from CTV HD), arytenoids | Inferior border of chricoid cartilage | Hyoid bone, thyrohyoid, omohyoid and sternohyoid muscle laterally to thyroid cartilage, chricoid cartilage (plus pyriform sinus depending on GTV) | Hyoid bone, thyrohyoid, omohyoid and sternohyoid muscle laterally to thyroid cartilage, chricoid cartilage | Hyoid bone, thyroid cartilage, omohyoid and sternohyoid muscle anterior to pre-epiglottic space, thyroid cartilage, chricoid cartilage | Epiglottis, posterior limit of thyroid cartilage, arythenoids |
CTV 3 | Optional (add margin from CTV 2) | Idem | Idem | Idem | Idem | idem |
Glottic larynx | ||||||
CTV1 | GTV + 0.5-1 cm margin | idem | Idem | idem | idem | idem |
CTV2 | sub-hyoid epiglottis and pre-epiglottis space anterior to sub-hyoid epiglottis, hyoid bone, arytenoid | Inferior border of cricoid cartilage | Hyoid bone, thyrohyoid, omohyoid and sternohyoid muscle laterally to thyroid cartilage, cricoid cartilage (plus pyriform sinus and thyroid gland depending on GTV) | Hyoid bone, thyrohyoid, omohyoid and sternohyoid muscle laterally to thyroid cartilage, cricoid cartilage | Hyoid bone, thyroid cartilage, omohyoid and sternohyoid muscle anterior to pre-epiglottic space, thyroid cartilage, cricoid cartilage | Epiglottis, posterior limit of thyroid cartilage, arythenoids |
CTV 3 | Optional (add margin from CTV 2) | Idem | Idem | Idem | Idem | idem |
Subglottic larynx | ||||||
CTV 1 | GTV + 0.5-1 cm margin | idem | Idem | idem | idem | idem |
CTV2 | Epiglottis, base of tongue (1Â cm from CTV HD), arytenoids | Superior limit of first tracheal cartilage (or lower depending on GTV) | Hyoid bone, thyrohyoid, omohyoid and sternohyoid muscle laterally to thyroid cartilage, chricoid cartilage, homolateral thyroid gland | Hyoid bone, thyrohyoid, omohyoid and sternohyoid muscle laterally to thyroid cartilage, chricoid cartilage | Hyoid bone, thyroid cartilage, omohyoid and sternohyoid muscle anterior to pre-epiglottic space, thyroid cartilage, chricoid cartilage | Retrochrycoid region, arythenoids, (upper oesophageal opening depending on GTV) |
CTV 3 | Optional (add margin from CTV 2) | Idem | Idem | Idem | Idem | idem |