Rare, risky, recurrent: An enigmatic cutaneous polyp.

Area of Science:

• Oncology
• Pathology

Background:

• Myxofibrosarcomas (MFSs) are malignant soft tissue tumors predominantly affecting older individuals.
• These tumors typically arise in deep subcutaneous tissues and fascia, often involving underlying muscle.
• MFSs are characterized by a high propensity for local recurrence, dedifferentiation to higher grades, and metastatic potential.

Observation:

• This case highlights a rare presentation of MFS as a superficial, exophytic, polypoidal cutaneous mass.
• The diagnosis was challenging due to the inherent morphological variability of myxofibrosarcomas.
• The superficial location and exophytic nature are atypical for this deep-seated sarcoma.

Findings:

• Under-diagnosis of MFS, particularly in atypical presentations, can lead to incomplete tumor resection.
• Morphological variability contributes to diagnostic challenges, potentially delaying appropriate treatment.
• The presented case underscores the importance of considering MFS even in superficial locations.

Implications:

• Timely and accurate diagnosis of myxofibrosarcomas is critical for effective management.
• Inadequate tumor clearance due to delayed diagnosis increases risks of recurrence and metastasis.
• Recognizing rare presentations of MFS can improve patient outcomes and reduce mortality.