Weekly Case

Title : Case 678

Age / Sex : 32 / M

Chief complaint : Protruding mass, left supraclavicular area, duration 6months

What is your diagnosis?

Two weeks later, you can see the final diagonosis with a brief discussion of this case (Please submit only one answer).

Courtesy : 
이신우 (Sheen-Woo Lee), 가천의대 길병원 (Gachon University Gil Hospital)



Dermatofibrosaroma Protuberans



Lobular lesion, with nonspecific MR signal intensity (Isosignal intensity on T1WI, high signal intensity of T2WI, diffuse homogeneous enhancement).

Differential Diagnosis:


Angiomyxoma (but it favors pelvic and perineal area).

 Epidermoid cyst (but it does not have internal contrast enhancement).



Dermatofibrosaroma Protuberans

  • Low grade superficial malignancy

  • Approximately 6% of all soft tissue sarcoma

  • Third to fifth decade of life, M>F

  • Frequently involve the trunk (50%), proximal upper and lower extremities(20 to 40%)

  • Local recurrence rate high (10 to 60%), due to infiltration of the lesion, not detected at initial surgical resection.

  • Low rate of distant metastases (0.5 to 6%)

  • Known to have Linear extension along the skin surface or satellite nodule in adjacent soft tissue (lacking in this case)



 Dermatofibrosarcoma Protuberans: MR Imaging Features. AJR 2002;178:989–993



Correct Answer
Total applicants 31 Correct answers 13
Name Institution
이진영 전문의
윤유성 순천향대 부천병원, 전문의
김형민 연세의대 강남세브란스병원, 전문의
임윤진 단국대학교병원, 전공의
백승진 분당차병원, 전공의
김동언 서울아산병원, 전문의
이성재 전문의
윤나연 전공의
이승보 서울아산병원, 전문의
변홍권 서울아산병원, 전문의
권기언 서울아산병원, 전문의
김성진 365병원, 전문의
이수민 전문의