Bashaireh Khaldoon M, Audat Ziad A, Jahmani Rami A, Aleshawi Abdelwahab J, Al Sbihi Ali F
Department of Special Surgery, Division of Orthopedics, Faculty of Medicine, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan.
Faculty of Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan.
Eur J Orthop Surg Traumatol. 2019 Aug;29(6):1355-1358. doi: 10.1007/s00590-019-02432-4. Epub 2019 Apr 9.
Epidermoid cysts are asymptomatic, slowly enlarging, firm to fluctuant, dome-shaped lesions. Epidermoid cysts frequently appear on the trunk, neck, face, and scrotum, behind the ears and in the palmoplantar region. We review all the cases of epidermoid cyst of the knee and present a case of non-traumatic-induced epidermal cyst in the popliteal fossa of a 66-year-old male with 10-year history of right knee swelling, which appeared firstly as a small mass 2 × 2 cm in the popliteal aspect of the knee. The mass was increasing gradually in size until 2 years ago when it increased suddenly to gain the dimensions of 4 × 6 cm. MRI of the right knee revealed a well-defined cystic lesion in the subcutaneous tissue measuring about 7 × 5 × 5 cm containing internal debris and septations. He underwent complete surgical excision of the mass. The pathological results revealed an epidermal inclusion cyst. To the best of our knowledge, this is the second description for epidermal inclusion cyst involving the popliteal fossa. We were able to retrieve three cases of epidermal cyst of the knee from the literature since its first description in 2004. Including our case, we had a total of four cases of epidermal cyst of the knee. Three males and one female constituted the patients' sample. The mean age for the patients is 55. The epidermal cyst occurred equally in both knees. The popliteal fossa was the location for two epidermal cysts. Similarly, the prepatellar region was the location for another two cysts.
表皮样囊肿是无症状的、缓慢增大的、质地坚硬至有波动感的、圆顶状病变。表皮样囊肿常出现在躯干、颈部、面部、阴囊、耳后及掌跖部位。我们回顾了所有膝关节表皮样囊肿的病例，并报告一例66岁男性腘窝处非创伤性表皮样囊肿病例，该患者有10年右膝肿胀病史，最初在膝关节腘窝处出现一个2×2cm的小肿块。肿块大小逐渐增大，直到2年前突然增大至4×6cm。右膝MRI显示皮下组织有一个边界清晰的囊性病变，大小约为7×5×5cm，内含内部碎屑和分隔。他接受了肿块的完整手术切除。病理结果显示为表皮样囊肿。据我们所知，这是第二例关于累及腘窝的表皮样囊肿的描述。自2004年首次描述以来，我们从文献中检索到3例膝关节表皮样囊肿病例。包括我们的病例在内，共有4例膝关节表皮样囊肿病例。患者样本包括3名男性和1名女性。患者的平均年龄为55岁。表皮样囊肿在双膝的发生率相同。两个表皮样囊肿位于腘窝处。同样，另外两个囊肿位于髌前区。
