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Stages of Paranasal Sinus and Nasal Cavity Cancer

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    Stage 0 (Carcinoma in Situ)

    In stage 0, abnormal cells are found in the innermost lining of the nasal cavity or ethmoid sinus. These abnormal cells may become cancer and spread into nearby normal tissue. Stage 0 is also called carcinoma in situ.

    Stage I

    In stage I, cancer has formed and is found in only one area (of either the nasal cavity or the ethmoid sinus) and may have spread into bone.

    Stage II

    In stage II, cancer is found in two areas (of either the nasal cavity or the ethmoid sinus) that are near each other or has spread to an area next to the sinuses. Cancer may also have spread into bone.

    Stage III

    In stage III, cancer has spread to any of the following:

    • The eye socket.
    • The maxillary sinus.
    • The roof of the mouth.
    • The bone between the eyes.

    or

    Cancer has spread to one lymph node on the same side of the neck as the cancer and the lymph node is 3 centimeters or smaller. Cancer has also spread to any of the following:

    • The nasal cavity.
    • The ethmoid sinus.
    • The eye socket.
    • The maxillary sinus.
    • The roof of the mouth.
    • The bone between the eyes.

    Stage IV

    Stage IV is divided into stage IVA, IVB, and IVC.

    Stage IVA

    In stage IVA, cancer has spread either:

    • to one lymph node on the same side of the neck as the cancer and the lymph node is larger than 3 centimeters but not larger than 6 centimeters; or
    • to more than one lymph node on the same side of the neck as the original tumor and the lymph nodes are not larger than 6 centimeters; or
    • to lymph nodes on the opposite side of the neck as the original tumor or on both sides of the neck, and the lymph nodes are not larger than 6 centimeters.

    and cancer has spread to any of the following:

    • The nasal cavity.
    • The ethmoid sinus.
    • The eye socket.
    • The maxillary sinus.
    • The roof of the mouth.
    • The bone between the eyes.
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