| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Squamous cell carcinoma, spindle cell | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Papillary carcinoma in situ | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Malignant squamous tumor, primary | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous carcinoma in situ - category | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Benign squamous cell tumor | Is a | True | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, microinvasive | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma with horn formation | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Basaloid squamous cell carcinoma | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, clear cell type | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Papillary squamous cell carcinoma, non-invasive | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, keratinizing | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Queyrat's erythroplasia | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous intraepithelial neoplasia, grade III | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Papilloma, no International Classification of Diseases for Oncology subtype (except papilloma of bladder M-81201) | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Papillary carcinoma | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, no International Classification of Diseases for Oncology subtype | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, small cell, nonkeratinizing | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Papillary squamous cell carcinoma | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, large cell, nonkeratinizing | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Verrucous papilloma | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma in situ with questionable stromal invasion | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma in situ, no International Classification of Diseases for Oncology subtype | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell papilloma | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma, metastatic | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Lymphoepithelial carcinoma | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous papillomatosis | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Bowen's disease | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Adenoid squamous cell carcinoma | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Verrucous carcinoma | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell papilloma, inverted | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma - category | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Linear porokeratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Giant porokeratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Disseminated superficial porokeratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Porokeratosis of Mantoux | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Porokeratosis of Mibelli, plaque type | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Porokeratosis of Mibelli, superficial disseminated type | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Disseminated superficial actinic porokeratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 3 | 
| Porokeratosis of Mibelli | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Porokeratosis of Mibelli, linear unilateral type | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Porokeratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous neoplasm of surface epithelium | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Superficial keratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Radiation-induced keratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Arsenical keratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Cutaneous horn | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Tar keratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Porokeratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Arsenical keratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Porokeratosis of Mantoux | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 2 | 
| Cutaneous horn | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous neoplasm of surface epithelium | Associated morphology | True | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Superficial keratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Radiation-induced keratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Tar keratosis | Associated morphology | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier | 1 | 
| Squamous cell carcinoma in situ | Is a | True | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Keratoacanthoma of uncertain behavior | Is a | True | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Squamous cell carcinoma of primary, secondary, or uncertain origin | Is a | False | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  | 
| Malignant squamous cell neoplasm | Is a | True | Squamous cell neoplasm | Inferred relationship | Existential restriction modifier |  |