Xaismboun special region was created in 1994-06. Change Notice 1 to FIPS PUB 10-4, dated 1998-12-01, lists a division of Laos into 16 provinces, one city, and one special zone. ISO 3166-2 Newsletter Number I-2 was published on 2002-05-21. It showed Xaismboun special region, but called it a province.
THE PARANASAL SINUSES. There are four pairs of paranasal sinuses, the frontal sinuses are located above the eyes, in the forehead bone. The maxillary sinuses (antra of Highmore) are located in the cheekbones, under the eyes. The ethmoid sinuses, also called ethmoid labyrinth are located between the eyes and the nose.here are four pairs of paranasal sinuses, the frontal sinuses are located above the eyes, in the forehead bone. The maxillary sinuses (antra of Highmore) are located in the cheekbones, under the eyes.
Ethmoid sinus cavities which are located between the eyes. Frontal sinus cavities which can be found above the eyes (more in the forehead region). Maxillary sinus cavities are located on either side of the nostrils (cheekbone areas).