Which of the following about lymphatlcs of vulva is true :

Traverse labia from medial to lateral Special features of Vulval lymphatics are as follows : The lymhatics of each side freel communicate with each other. The lymphatics hardly cross beyond labiocrural fold. Vulval lymphatics also anastomose with lymphatics of lower 1/3 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.Glands of cloquet or Rosenmuller which is the uppermost deep femoral gland is absent in 50% of cases. "From the upper 2/3 of the left and right labia majora superficial lymphatics pass towards the symphasis and turn laterally to joint the medial superficial inguinal nodes." Hence they traverse labia from medial to lateral.