TY - JOUR AR - SCR-2020-3-109 TI - An Intramuscular Epidermal Cyst of Erector Spinae Muscles: A Case Report AU - Jong Han, Gill AU - Myeong Jin Ko, AU - Seong Hyun Wui, AU - Seung Won Park, JO - Surgical Case Reports PY - 2020 DA - Wed 08, Apr 2020 SN - 2613-5965 DO - http://dx.doi.org/10.31487/j.SCR.2020.03.09 UR - https://www.sciencerepository.org/an-intramuscular-epidermal-cyst_SCR-2020-3-109 KW - Intramuscular epidermal cyst, cystic mass, muscle pain AB - An intramuscular epidermal cyst without subcutaneous involvement is extremely rare. The patient presented with low back pain. Spinal magnetic resonance imaging indicated spindle-shaped mass in the right erector spinae muscles located at L3 to L5 level without any connection with subcutaneous tissue. The patient underwent operation for removal of intramuscular cystic lesion. The tumor was totally removed and pathologically confirmed with epidermal cyst. Unlike typical epidermal cyst, the patient had a characteristic clinical manifestation of mild low back pain without palpable mass and local tenderness.