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Glomus tumour of uncertain malignant potential
S Chaabouni1, L Ayadi, R Kallel
1Department of Pathology, Habib Bourguiba University Hospital, Sfax, Tunisia.
Pathologica
|May 30, 2009
Summary
A painful knee mass in a 71-year-old man was diagnosed as a glomus tumor (GT) of uncertain malignant potential. This large, atypical tumor required surgical resection.
Area of Science:
- Orthopedic Surgery
- Surgical Pathology
- Oncology
Background:
- Glomus tumors (GTs) are typically benign vascular neoplasms.
- Atypical presentations of GTs can pose diagnostic challenges.
- Large or deeply located GTs may require extensive surgical intervention.
Observation:
- A 71-year-old male presented with a large, painful, slowly enlarging knee mass.
- Surgical exploration revealed a well-circumscribed subcutaneous mass adhered to the patella.
- Macroscopic examination showed a 6 x 5 x 5 cm tumor with focal marked atypia.
Findings:
- Histopathological analysis confirmed areas of benign glomus tumor.
- The tumor exhibited features of superficial location, large size, and focal atypia.
- The overall findings were consistent with a diagnosis of glomus tumor of uncertain malignant potential.
Implications:
- This case highlights the importance of considering atypical glomus tumors in the differential diagnosis of knee masses.
- Surgical resection is the primary treatment modality for symptomatic or large glomus tumors.
- Further research is needed to establish clear prognostic factors and management guidelines for glomus tumors of uncertain malignant potential.