As in this Dispensation consultation with expert doctors is highly advisable and acting in accordance with their prescriptions obligatory, it is well for her to undergo an operation if deemed necessary by such doctors.
(‘Abdu’l-Bahá, The Compilation of Compilations vol. I, p. 470)
Observe the human body, its limbs, its members, the eye, the ear, the organs of smell, of taste, the hands, the fingernails. Notwithstanding the differences among all these parts, each one within the limitations of its own being participateth in a coherent whole. If one of them faileth it must be healed, and should no remedy avail, that part must be removed.
(‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 190)