A 43-year-old female (G-1, A-1) presented to the clinic with a 2-year history of painless swelling in the left labia majora. Perineal  examination  was  normal  except  for  a  2  cm  mass in  the   left  labia  majora,  movable  with  soft  rubbery  con- sistency. The  skin  over  the  labia  was  normal, with  no  vas- cular  changes.  There  was  no  inguinal  lymphadenopathy. Her  family   history  was  unremarkable.  Perineal  ultrasound demonstrated  a  unicameral  well-demarcated   oval-shaped cyst measuring 29.5 x 13.0  mm in size, with homogeneous, hyperechogenic  internal   echotexture  and  no  Doppler  flow (Fig. 1A). The  mass  was  enucleated  with  an  intact   capsule under anesthesia (Fig. 1B, C). The cyst was filled with thick, greasy material. The pathological findings of this mass were consistent  with  a  steatocystoma  (Fig.  1D). There  was   no recurrence during the 7-month follow-up.