A Huge Infected Popliteal Cyst Dissecting into Gastrocnemius Mimicking Calf Abscess

We report a case of a chronic huge popliteal cyst, which dissected into the gastrocnemius without rupture and was complicated with acute primary infection mimicking calf abscess upon presentation. To the best of our knowledge, it is the largest popliteal cyst with intramuscular dissection reported in the literature. It is noteworthy that infected popliteal cyst is a rare differential diagnosis of calf abscess. 我們報告一個慢性巨大的膕窩囊腫病例。它擴展至腓腸肌而沒有破裂，且併發出急性原發性感染，模仿小腿肌肉膿腫的徵狀。盡我們所知，這是文獻報導過最大的擴展至腓腸肌之膕窩囊腫。膕窩囊腫感染是小腿膿腫罕見但值得注意的鑑別診斷。