Nuchal-type Fibroma
Definition
- Hypocellular collagenous lesion with surrounded fat and nerves typically located in the subcutis of the posterior neck
Alternate / Historical Names
- Collagenosis nuchae
- Nuchal fibrocartilaginous pseudotumor
- Nuchal fibroma
Diagnostic Criteria
- Not encapsulated, radiates into fat
- Frequent entrapped fat
- Subcutaneous component in all cases
- Paucicellular thick bundles of collagen
- Few, small fibrocytes
- Frequent entrapped nerves
- May show traumatic neuroma-like fibrosis and proliferation
- Infrequent infiltration of skeletal muscle
- Typically located in or near posterior neck
- Similar lesions occuring in children or extra-nuchal sites may be associated with Gardner syndrome
Robert V Rouse MD
Department of Pathology
Stanford University School of Medicine
Stanford CA 94305-5342Original posting: November 20, 2007
Last Update: January 14, 2008
