Related Experiment Videos
Pleomorphic angioleiomyoma
N Kawagishi1, T Kashiwagi, M Ibe
1Division of Dermatology, Kitami Kobayashi Hospital, Japan.
The American Journal of Dermatopathology
|June 28, 2000
Summary
Pleomorphic angioleiomyoma, a rare smooth muscle tumor, presents with unusual cell features. Immunohistochemistry indicates these changes are not degenerative but reflect active cell proliferation.
Area of Science:
- Dermatopathology
- Surgical Pathology
- Oncology
Background:
- Angioleiomyomas are benign tumors originating from smooth muscle tissue, typically found in the extremities.
- Pleomorphic angioleiomyoma is a rare variant characterized by atypical cellular morphology.
Observation:
- Two cases are presented: a 46-year-old male with a scrotal nodule and a 38-year-old female with a knee nodule.
- Both lesions were histopathologically identified as well-circumscribed nodules with smooth muscle, veins, and capillaries.
Findings:
- Marked nuclear pleomorphism was observed, distinguishing these from ordinary angioleiomyomas.
- Despite rare mitoses, immunohistochemistry showed positivity for proliferating cell nuclear antigen, Ki-67, and p53.
- These markers suggest active proliferation rather than simple degenerative changes in tumor cells.
Implications:
- The findings challenge the notion that pleomorphism in these tumors is solely degenerative.
- Understanding the proliferative nature of pleomorphic angioleiomyoma is crucial for accurate diagnosis and patient management.
- Further research may elucidate the specific biological behavior and clinical significance of this variant.