Atypical Lipomatous Tumor
Clinical
- Predominantly middle age and older
- Location
- Central body
- Retroperitoneum, spermatic cord, mediastinum
- Frequent recurrences, may be uncontrollable
- Initial specimen or recurrences may exhibit dedifferentiation
- Intramuscular / intermuscular
- Thigh, arm, buttock
- Frequent recurrences, rarely uncontrollable
- Dedifferentiation rare
- Subcutaneous
- By definition does not occur in posterior neck, upper back or shoulders
- Infrequent recurrences, never uncontrollable
- Dedifferentiation very rare
- Viscera
- Larynx most common, other sites extremely rare
- Recurrences frequent, never uncontrollable
- Dedifferentiation very rare
- General behavior
- Local recurrences
- No metastases unless dedifferentiated
