EOD Primary Tumor

Notes

**Note 1:** Impaired vocal cord mobility, also described as vocal cord paresis, may suggest invasion of intrinsic laryngeal muscle. Fixation of the vocal cord may be described as immobility of the arytenoids noted on endoscopy, vocal cord paralysis, or deviation of larynx to fixed side. **Note 2:** Code 100 for localized tumor only if no information is available to identify further extension.
Code Description SS2018 T
000 In situ, intraepithelial, noninvasive IS
100 One vocal cord with normal vocal cord mobility L
150 Both vocal cords with normal vocal cord mobility L
200 Invasive tumor with normal vocal cord mobility Intrinsic larynx Laryngeal commissure(s) (anterior, posterior) Vocal cord(s) (true cord(s), true vocal cord(s), NOS) Confined to glottis, NOS Localized, NOS L
250 Impaired vocal cord mobility Adjacent region(s) of larynx involved Subglottis Supraglottis - Aryepiglottic fold - Cartilage (arytenoid, corniculate, cuneiform, laryngeal, NOS) - Epiglottis (infrahyoid, laryngeal [posterior] surface of epiglottis) - Epiglottis (suprahyoid) (including tip, lingual (anterior) and laryngeal surfaces) - Epilarynx, NOS - False cords: ventricular bands/cavity/vestibular fold L
300 Limited to larynx WITH vocal cord fixation Intrinsic muscle(s) of larynx - Aryepiglottic - Arytenoid - Cricoarytenoid - Cricothyroid - Thyroarytenoid - Thyroepiglottic - Vocalis L
400 Paraglottic space Thyroid cartilage (inner cortex) (minor erosion) RE
500 Base of tongue Hypopharynx, NOS Postcricoid area Pre-epiglottic space Pre-epiglottic tissues Pyriform sinus (pyriform fossa) Vallecula RE
600 Cricoid cartilage Esophagus Extrinsic muscle(s) of tongue - Genioglossus - Geniohyoid - Hyoglossus - Mylohyoid - Palatoglossus - Styloglossus Oropharynx, NOS Skin Soft tissues of neck Strap muscle(s) - Omohyoid - Sternohyoid - Sternothyroid - Thyrohyoid Thyroid cartilage (outer cortex, NOS) Thyroid gland Trachea D
700 Carotid artery (encased) Mediastinal structure(s) Prevertebral space Further contiguous extension D
999 Unknown; extension not stated Primary tumor cannot be assessed Not documented in medical record Death Certificate Only U
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