“…Other signs are fever, periorbital
cellulitis, periorbital edema, ophthalmoplegia, proptosis, loss of vision, and other
neurological deficits. 29,30 The disease can be divided into
three clinical stages: stage I, with signs and symptoms limited to the sino-nasal
area; stage II, which is characterized by a sino-orbital infection; and stage III,
which has intracranial involvement. 30 …”