Plantar Fibromatosis
Definition
- A nodular, cytologically bland fibroproliferative process that involves the plantar aponeuroses
Alternate / Historical Names
-
Ledderhose disease
Diagnostic Criteria
- Involves plantar aponeurosis
- May extend to dermis
- Deeper tissues not involved except post surgery
- Forms nodule or nodules
- Infrequently over 3 cm
- Cellularity ranges from low to high
- Older lesions are densely collagenous
- Bland spindle cells
- Nuclei small and dark to moderate sized and vesicular
- Scant cytoplasm
- Variable numbers of multinucleated giant cells seen in most cases
- Mitotic figures may be frequent but not atypical
- Small foci of perivascular hemorrhage and hemosiderin may be present
- Metaplastic cartilage and bone are seen rarely
Robert V Rouse MD
Department of Pathology
Stanford University School of Medicine
Stanford CA 94305-5342
Original posting: November 29, 2007