Which of the following about lymphatics of vulva is true:

Special features of vulva] lymphatics are as follows: • The lymphatics of each side freely communicate with each other. • The lymphatics hardly cross beyond labiocrural fold. • Vulval lymphatics also anastomose with lymphatics of lower l/3rd of vagina and drain into external iliac nodes. • Superficial lymph nodes are the primary lymph nodes that act as sentinel glands of vulva. Deep inguial nodes are secondarily involved. It is unusual to find pelvic glands without metastasis in inguinal nodes.