PGR and leiomyoma: Immunostaining findings of alpha-smooth muscle actin (α-SMA) (+) (Fig. 5c), desmin (+), c-kit (−), cluster of differentiation CD34 (−), discovered on GIST protein 1 (DOG1) (−), S-100 proteins (−), and CD68 (−) suggested leiomyoma of the sigmoid mesentery, and weak positivity for the estrogen receptor (ER) and strong positivity for the progesterone receptor (PgR) confirmed the pathological diagnosis of PL (Fig. 5d).