Types
| Type | Most common location(s) | Circumscription | Cellularity | Vascularity and nature of vessels | Appearance of collagen | Elastic fibers | Picture |
|---|---|---|---|---|---|---|---|
| Nuchal fibroma | Nuchal region | No | Very low | Very low | Bundles of fibers | Scant | |
| Collagenous fibroma | Shoulder girdle, extremities | Yes, by macroscopic appearance, but microscopically infiltrative | Increased but generally low | Low | Scant or absent | Amorphous | |
| Fibroma of tendon sheath | Distal extremities, especially the hand | Yes | Low to high | Moderate to high, with some slitlike vessels | Amorphous | Absent | |
| Scar | Variable | Variable | Low to high | Variable | Amorphous | Scant to absent | |
| Elastofibroma | Subscapular chest wall | No | Low to moderate | Low | Amorphous | Abundant and abnormal | |
| Desmoid-type fibromatosis | Abdominal wall, shoulder girdle | Yes, by macroscopic appearance, but microscopically infiltrative | Moderate | Moderate, mildly dilated | Amorphous | Absent | |
| Keloid | Upper part of back, deltoid, presternal, ear lobes | No | Some fibroblasts | Low | Amorphous thick eosinophilic bundles | Scant or Absent |
Read more about this topic: Fibrosis
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