Patients with paranasal sinus dysplasia require the following tests: CT examination of the otorhinolaryngology: CT examination of the otorhinolaryngology is a method of examining the otorhinolaryngology by CT. MRI examination of nasopharynx: MRI examination of nasopharynx refers to the examination of nasopharyngeal tumor. This method is clearer and more comprehensive than CT in showing the normal anatomy of nasopharynx as well as the pathological anatomy. Nasal vestibular examination method: The examined head is tilted back, the tip of the nose is lifted up with the fingers, and the tip of the nose is lifted up with the thumb, and the whole nasal vestibule can be seen by the light reflected from the frontal mirror, and the skin of the nasal vestibule is observed for congestion, swelling, cracking, ulceration, boils, bulging and crusting, and whether there is loss of nasal hair. Anterior nasoscopy method: The examiner holds the nasoscope with one hand, pinches the joint of the anterior nasoscope with the thumb and index finger, and holds the anterior nasoscope in the left hand, first brings the two lobes of the anterior nasoscope together and extends it into the nasal vestibule parallel to the base of the nose, without crossing the nasal threshold. The right hand supports the subject’s head and changes the head position as needed for the examination. The lobes are slowly opened and the nasal cavity is examined in turn. First, the subject’s head is lowered slightly (first position), and the nasal floor, inferior nasal tract, inferior turbinate, and anterior and inferior part of the nasal septum are observed from the bottom to the top, then the subject’s head is tilted back 30° (second position), and the middle nasal tract, middle turbinate, and olfactory fissure and middle nasal septum are examined. Note whether there is congestion, anemia, swelling, hypertrophy, atrophy of the turbinates, polypoid changes in the middle turbinates, secretions and the nature of secretions in the nasal passages and nasal floor, deviation, perforation, bleeding, vascular varices, ulceration and erosion or mucosal hypertrophy of the nasal septum, and neoplasm and foreign bodies in the nasal cavity. If the inferior turbinate is enlarged, it can be examined after contraction with l% ephedrine saline. After the examination, do not close the mirror lobe when removing the anterior nasal mirror to avoid pinching the nasal hairs. Sometimes the inferior turbinate is thin and small, but the color is normal, the patient can be examined lying in a toilet with a smaller inferior turbinate for about 5 minutes, and immediately after standing up for the anterior nasal mirror examination, the inferior turbinate volume remains the same large must be considered as early inferior turbinate atrophy. Sinus examination method: observe the local skin of each sinus for redness, swelling, elevation, the middle nasal tract and olfactory fissure for secretions, polyps or new organisms, the eyes medical education `education network to collect and organize whether there is displacement or movement disorders, local percussion pain, pressure pain, bone resorption or destruction can have ping-pong sensation or substantial feeling. In addition, postural drainage or maxillary sinus puncture irrigation is feasible. Nasal and sinus endoscopy: Nasal endoscopy is divided into rigid tuboscopy and fiberscope. It can clearly observe the various parts of the nasal cavity, the opening of the nasopharynx and each sinus, and also take biopsies and coagulation to stop bleeding under direct vision. Nasal imaging method: commonly used methods include sinus X-ray, sinus CT, sinus MRI. Sinus CT is a basic auxiliary examination for nasal endoscopic surgery, which can be scanned in coronal or axial position and can clearly show the fine anatomical structures of the nasal cavity and sinuses, which has important clinical significance for the diagnosis of nasal cavity and sinus diseases. Sinus MRI has high resolution for soft tissues and is clinically important for the diagnosis of nasal polyps, sinus cysts and tumors.