external auditory canal cerumen tumor
Introduction
Introduction of external ear canal tumors A salivary gland tumor is a tumor with an adenoid structure that occurs in the external auditory canal. Tumor originates from the external epicardial cartilage of the parotid ductal epithelium and myoepithelial tissue. Histopathology can be divided into sputum adenoma, pleomorphic adenoma, adenoid cystic carcinoma and parotid carcinoma. It is more common in malignant tumors. It accounts for 70% of all external ear canal tumors. The origin and the anterior wall of the ear canal are mostly outside the site of the ear canal. The tumor of the parotid gland of the external auditory canal grows slowly, but it is easy to expand. The local recurrence rate after resection is high, and distant metastasis can occur in the late stage. External ear canal tumors are not sensitive to radiation therapy, so radical resection is the main surgical procedure. Although the pathological histology of squamous adenomas and pleomorphic adenomas is benign, the rate of recurrence and malignant transformation is very high, and the clinical treatment is based on the surgical principle of malignant tumors or potential malignant tumors. basic knowledge The proportion of illness: 0.003% Susceptible people: no special people Mode of infection: non-infectious Complications: facial paralysis
Cause
External ear canal tumor adenocarcinoma
Not very clear. May be associated with UV exposure, such as exposure to intense sunlight, and may be associated with inflammatory stimuli in chronic otitis externa or chronic otitis media.
Prevention
External auditory canal tumor prevention
Because the adenoma is prone to malignant transformation, it should be removed early, including removal of a portion of normal skin around the tumor. If the pathological examination shows malignant transformation, the scope of resection should be further expanded, postoperative radiotherapy, and long-term follow-up observation. The disease is easy to malignant and easy to relapse. Repeated recurrence has a poor prognosis.
Complication
External auditory canal tumor complications Complications
If the tumor spreads to the periphery, especially in cases of malignant transformation, it can cause facial paralysis.
Symptom
External auditory canal tumor symptoms common symptoms ear pain ear itch hearing loss ear flow pus external ear canal stenosis ear plug
The patient's symptoms are not obvious. However, as the tumor gradually increases, it can cause earache, itching, ear blockage and hearing impairment. If there is a secondary infection, the tumor may rupture and bleed, the earache is aggravated and radiated to the affected area and the posterior region of the ear. Obvious ear pain often indicates that the tumor is malignant or malignant. The signs of clinical examination vary according to the nature of the tumor. The appearance of squamous adenomas and pleomorphic adenomas is grayish-white polyps, or the surface is smooth and normal skin, and the texture is tough; and adenoid cystic carcinoma and sputum Parotid gland cancer is often seen in the external auditory canal with granulation-like or nodular neoplasms, the surface is not smooth, may have crusting, pedicle or connected with the external auditory canal, diffuse infiltration, resulting in redness, stenosis or bloody secretions of the external auditory canal, but there are similar Appearance of benign tumors.
Examine
Examination of parotid gland tumors in the external auditory canal
General biopsy of polypoid new organisms in the ear canal is diagnosed by pathological examination. The tympanic membrane is congested, the cone of light disappears, and the liquid level is visible. The tympanic membrane can be examined by electric otoscope. The pure tone is used to check the hearing changes. The acoustic impedance measurement shows that the tympanic pressure curve is "C" shaped. The lighter ones only feel the ear suffocation and healed after a few hours. In severe cases, earache, tinnitus and suction loss are obvious, and it can be restored in the future. If the tympanic effusion and blood accumulation are not easy to absorb, it will last for several days. In some cases, the tympanic membrane can be congested, and the tympanic membrane can be perforated. After repeated injuries, the tympanic membrane is often invaginated, the turbidity is thickened, the activity is poor, and the vocal tract is transmitted.
Diagnosis
Diagnosis and diagnosis of external ear canal tumor
diagnosis
Diagnosis can be based on medical history, clinical symptoms, and laboratory tests.
Differential diagnosis
1. External auditory canal cholesteatoma: After the external auditory canal injury, or the inflammation of the skin makes the basal cells of the germinal layer grow vigorously, the keratinized epithelial cells accelerate the shedding, and the exclusion is affected, and excessive accumulation of cholesteatoma in the external auditory canal is formed. There is no obvious symptom of small cholesteatoma without secondary infection. In patients with larger cholesteatoma, there may be occlusion in the ear, tinnitus, and hearing loss. Once the infection is secondary, there is earache, which can be radiated to the head. The severe person does not sleep at night, and there is pus or pus in the ear, which is smelly. The examination also showed embolic lesions in the external auditory canal, but there were a large number of white epithelial embolisms in the lesion, which could be distinguished from common sputum embolism. But sometimes it is necessary to pay attention to the long-term embolism, sometimes secondary to the external auditory canal cholesteatoma.
2. Foreign bodies in the external auditory canal: There are many kinds of foreign bodies in the external auditory canal, which are more common in children. Because children like to put small objects in their ears. Adults may also inadvertently store foreign objects in the ear canal during ear-cutting, or invading, invading foreign objects during work, and crawling in insects. The diagnosis of foreign bodies in the external auditory canal is not difficult, but small foreign bodies located deep in the bottom of the external auditory canal are easily overlooked; or because the foreign body stays for too long, and the middle ear and the external auditory canal are inflamed; or the local secretions are more, and are surrounded by the sputum. Clinical manifestations may vary depending on the size, shape, location and type of foreign body.
3. External auditory canal: caused by infection of staphylococcal skin follicles or sebaceous glands in the external auditory canal. It is mainly caused by severe ear pain and can be radiated to the ipsilateral head. Pain increased when you open your mouth, chew, and yawn. If the swelling of the external auditory canal can affect the hearing.
