| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| [M]Fibroma NOS | Is a | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Pleural fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Subungual fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Fibroma of prostate | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Hare fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Squirrel fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Shope fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Periungual fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Periungual fibroma in tuberous sclerosis | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of tendon sheath | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of ovary | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nonossified fibroma of bone | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Hare fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of tongue | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Subungual fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of chest wall | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of prostate | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Periungual fibroma in tuberous sclerosis | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Periungual fibroma | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of upper limb | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of lower limb | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of tendon sheath | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Desmoplastic fibroblastoma | Is a | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Nuchal-type fibroma | Is a | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Gardner fibroma | Is a | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Fibroma of lung | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Sclerotic fibroma | Is a | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Metaphyseal fibrous defect | Is a | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Fibrothecoma | Is a | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Fibroma of left ovary | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of right ovary | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Fibroma of mouth | Associated morphology | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| [M]Fibroma NOS | Is a | False | Fibroma, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  |