The Mother of God named "Pantanassa"

In Greece, in the holy monastery of Vatopedi, on Mount Athos, there is located the miracleworking icon of the Mother of God named “Pantanassa” (All-Reigning or Queen of All). This is
a small icon from the 17th century, which from these ancient times has been a focus of pilgrimage for those seeking healing and comfort from the Most Holy One from illness and temptations.
This icon of the Mother of God is especially known for healing those who pray before it with sincerity from the sickness of cancer.

Prayer to the Mother of God
O All-Good Mother of God Queen of All! I am not worthy for Thee to come under my roof, but, as the Mother of the Merciful God, say a word that my soul would be healed, and my sick body would be strengthened. O Queen of All, Thou hast an unconquerable might and Thou can ask always; ask for me, pray for me, that I would glorify Thy Most Glorious name always, now and forever. Amen

Here is the full Akathist http://www.stvladimiraami.org/sheetmusic/akathistvsetsaritsa.pdf