[Perianal dermatofibrosarcoma protuberans: a case report, review and update]

Area of Science:

• Oncology
• Dermatology
• Surgical Pathology

Background:

• Dermatofibrosarcoma protuberans (DFSP) is a rare, low-grade skin sarcoma.
• Typically arises in the dermis, with potential for deep tissue invasion.
• Perianal DFSP is exceptionally rare, posing unique clinical challenges.

Observation:

• A case of perianal dermatofibrosarcoma protuberans in a 41-year-old male is presented.
• The patient reported symptoms of anal pain and constipation.
• The unusual anatomical location complicated surgical management.

Findings:

• The characteristic translocation t(17;22)(q22;q13) resulting in COL1A1/PDGFβ fusion transcripts is a key diagnostic marker.
• This genetic alteration is crucial for identifying DFSP and guiding treatment.
• The presence of this fusion transcript is also linked to therapeutic response.

Implications:

• Perianal DFSP requires specialized diagnostic and surgical approaches due to its location.
• Imatinib therapy offers a viable treatment option for inoperable or metastatic cases.
• Understanding the molecular basis of DFSP aids in developing targeted treatment strategies.