| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Squamous cell carcinoma, spindle cell | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, microinvasive | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma with horn formation | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Basaloid squamous cell carcinoma | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, clear cell type | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, keratinizing | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Papillary carcinoma | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, no International Classification of Diseases for Oncology subtype | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, small cell, nonkeratinizing | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Papillary squamous cell carcinoma | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, large cell, nonkeratinizing | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Lymphoepithelial carcinoma | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Adenoid squamous cell carcinoma | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Verrucous carcinoma | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma of bronchus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous cell carcinoma of bronchus in left lower lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus in left upper lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus in right lower lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus in right middle lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus in right upper lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus in left upper lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus in right upper lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus in left lower lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus in right lower lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of bronchus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous cell carcinoma of bronchus in right middle lobe | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary squamous cell carcinoma of naris | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of naris | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Nasopharyngeal carcinoma | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of posterior wall of oropharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of branchial cleft | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of postcricoid region | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of pyriform sinus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of accessory sinus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of nasopharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of maxillary sinus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of hypopharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of trachea | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of supraglottis | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of laryngeal cartilage | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of hypopharyngeal aspect of aryepiglottic fold | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of larynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of glottis | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of sphenoidal sinus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of frontal sinus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of lateral wall of oropharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of vallecula | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of ethmoidal sinus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of anterior surface of epiglottis | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of subglottis | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of posterior wall of hypopharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Overlapping squamous cell carcinoma of larynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Overlapping squamous cell carcinoma of laryngeal cartilage | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of oropharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of vermilion border of lip | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of palatine tonsil | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of urethra | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of thymus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of chest wall | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of upper limb | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of skin of left lower limb | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of skin of right lower limb | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of left ear | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of ear | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of right ear | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of overlapping sites of accessory sinuses | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of upper third of esophagus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of middle third of esophagus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of lower third of esophagus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of overlapping sites of esophagus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary squamous cell carcinoma of overlapping sites of male genital organ | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary squamous cell carcinoma of anal canal | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of lacrimal apparatus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of base of tongue | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of lingual tonsil | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of parotid gland | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of pharyngeal tonsil | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of middle ear | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of vagina | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of nasal cavity | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of anus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Pseudovascular squamous cell carcinoma | Is a | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma of small intestine | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous cell carcinoma of gallbladder and extrahepatic biliary tract | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous cell carcinoma of stomach | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous cell carcinoma of colon | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous cell carcinoma of rectum | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous cell carcinoma of liver and intrahepatic biliary tract | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of overlapping sites of nasopharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of lateral wall of nasopharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of superior wall of nasopharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinomas of anterior wall of nasopharynx | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of left main bronchus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of right main bronchus | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of skin of left breast | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of skin of left hand | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of skin of right hand | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of skin of right breast | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of inferior surface of tongue | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of border of tongue | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of dorsal surface of tongue | Associated morphology | False | Malignant squamous tumor, primary | Inferred relationship | Existential restriction modifier | 1 |