In this task, you are given a sentence in the English language. Your job is to translate the English sentence into the Spanish language.

In a 68-year-old patient with new onset headache, pain and prolonged morning stiffness in scapular and pelvic girdles of several weeks of evolution that presents unilateral bruising of sudden onset, what treatment among the following would establish before confirming the diagnosis?
En una paciente de 68 años de edad con cefalea de nueva aparición, dolor y rigidez matutina prolongada en cinturas escapular y pélvica de varias semanas de evolución que presenta amaurosis unilateral de brusca aparición, ¿qué tratamiento entre los siguientes instauraría antes de confirmar el diagnóstico?