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[Dermatofibrosarcoma protuberans developing for 25 years with 27 recurrences. Histological and ultrastructural study]
Annales D'Anatomie Pathologique
|January 1, 1980
Summary
This study details a rare, aggressive protuberant dermatofibrosarcoma with 27 relapses over 25 years. Ultrastructure reveals myofibroblastic and histiocytic features, aiding in understanding this challenging skin cancer.
Area of Science:
- Dermatopathology
- Oncology
- Surgical Pathology
Background:
- Protuberant dermatofibrosarcoma is a rare skin neoplasm.
- Understanding its histological and ultrastructural characteristics is crucial for diagnosis and management.
Observation:
- A case of protuberant dermatofibrosarcoma with a 25-year history and 27 relapses was studied.
- Histology revealed a dermal, non-encapsulated tumor invading the hypodermis, composed of storiform fusiform cells in a myxoid stroma.
- Later relapses showed increased cellularity, compact zones, and mitoses, with areas of cystic degeneration.
Findings:
- Ultrastructural analysis identified tumor cells with developed endoplasmic reticulum, Golgi apparatus, and pinocytic vesicles.
- Cells exhibited features of myofibroblastic (cytoplasmic filaments, contractile elements) and histiocytic (lysosomes, phagolysosomes) differentiation.
- Cellular junctions and amorphous extracellular material were also observed.
Implications:
- The findings support classifying this tumor within myofibroblastic and histiocytic proliferating lesions.
- This detailed case study provides insights into the aggressive behavior and cellular origins of protuberant dermatofibrosarcoma.
- Further research into similar aggressive variants may improve therapeutic strategies for this rare sarcoma.