Jong Han Gill,Myeong Jin Ko ,Seong Hyun Wui ,Seung Won Park ,
An Intramuscular Epidermal Cyst of Erector Spinae Muscles: A Case Report
Surgical Case Reports
2020
2613-5965
http://dx.doi.org/10.31487/j.SCR.2020.03.09
https://www.sciencerepository.org/an-intramuscular-epidermal-cyst_SCR-2020-3-109 
Abstract: 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.
Keywords: Intramuscular epidermal cyst, cystic mass, muscle pain