endolymphatic sac tumor ; Definition, Causes, Symptoms, Diagnosis, Treatment

Описание: An endolymphatic sac tumor (ELST) is a very rare and locally aggressive tumor that arises within the endolymphatic sac or duct, typically located in the inner ear. Here are some key points about ELSTs:

Characteristics
Type: Papillary epithelial neoplasm

Location: Arises within the endolymphatic sac or duct, usually in the petrous bone of the temporal bone.

Association: Strongly associated with von Hippel-Lindau (VHL) syndrome, a genetic disorder.

Symptoms
Hearing Loss: Progressive or fluctuating sensorineural hearing loss.

Tinnitus: Ringing in the ears.

Vertigo: Dizziness or loss of balance.

Facial Paresis: Weakness or paralysis of facial muscles (less common).

Other Symptoms: May include aural fullness and intralabyrinthine hemorrhage.

Diagnosis
Imaging: CT scans and MRI are used to detect and evaluate ELSTs. These imaging studies show bone erosion, hyperintensity, and heterogeneous enhancement1.

Biopsy: A tissue sample may be taken to confirm the diagnosis.

Treatment
Surgical Excision: The primary treatment is surgical removal of the tumor. Early detection and intervention are crucial to prevent further hearing loss2.

Radiation Therapy: May be used in conjunction with surgery for advanced cases.

Prognosis
Recurrence: ELSTs have a high recurrence rate if not completely excised.

Survival Rate: The prognosis varies depending on the stage and location of the tumor, as well as the patient's overall health

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