| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| pT1b: Tumor involves both vocal cords (may involve anterior or posterior commissure) with normal mobility (larynx, glottis) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor 5 cm or less in greatest dimension, deep tumor (soft tissue) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor more than 0.5 cm but not more than 1 cm in greatest dimension (breast) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor more than 4 cm but not more than 7 cm in greatest dimension, limited to the kidney (kidney) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor invades muscle layer (gallbladder) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b (IB): Tumor confined to the vulva or vulva and perineum, 2 cm or less in greatest dimension, and with stromal invasion greater than 1 mm (TNM category and FIGO stage) (vulva) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Melanoma 1.0 mm or less in thickness and level IV or V or with ulceration (melanoma of the skin) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor invades submucosa (esophagus) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b (IB): Tumor invades less than one-half of the myometrium (TNM category and FIGO stage) (corpus uteri) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b (IB): Clinically visible lesion confined to the cervix or microscopic lesion greater than T1a2/IA2 (TNM category and FIGO stage) (uterine cervix) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor limited to the iris (more than 3 clock hours in size) (iris) (uveal melanoma) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor 2 cm or less in greatest dimension, limited to dermis and greater than 2 mm in thickness, but not more than 6 mm in thickness (carcinoma of skin excluding eyelid, vulva, penis, and melanomas) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b1 category | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor involves ipsilateral parietal (mediastinal, diaphragmatic) pleura, with focal involvement of the visceral pleura (thoracic mesothelioma) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b (IB): Tumor limited to both ovaries; capsule intact, no tumor on ovarian surface. No malignant cells in ascites or peritoneal washings (TNM category and FIGO stage) (ovary) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor 5 cm or less in greatest dimension, deep tumor (extraosseous primitive neuroectodermal tumor/Ewing's sarcoma) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b (IB): Tumor limited to both tubes, without penetrating the serosal surface; no ascites (TNM category and FIGO stage) (fallopian tube) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b2 category | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness) with microscopic extraocular extension (ciliary body and choroid) (uveal melanoma) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  | 
| pT1b: Tumor invades submucosa (stomach) | Is a | False | pT1b category | Inferred relationship | Existential restriction modifier |  |