## Overview Ear melanomas are melanocytic tumors that develop at the base of the ear, within the ear canal, or on the pinna of gray horses. They are part of the progressive melanoma syndrome common in aging grays. Most grow slowly, but larger masses can obstruct the ear canal, interfere with tack, or ulcerate. ## Causes Genetic predisposition in gray horses linked to the same mutation that causes progressive graying. Melanocytes proliferate over time. ## Diagnosis Visual and otoscopic examination. Biopsy confirms the diagnosis when needed. Staging evaluates for internal melanomas. ## Treatment Monitoring for small, non-obstructive lesions. Surgical excision, laser ablation, or cisplatin beads for problematic masses. Systemic therapies are under investigation for widespread disease. ## Recovery and Prognosis Good for local control of accessible lesions. The overall melanoma burden in gray horses is progressive. ## Prevention None. Regular monitoring of gray horses allows early intervention.
dark firm nodules at the ear base or in the canal; possible obstruction causing head tilt or discharge; interference with bridle fit; may ulcerate
## Overview Ear melanomas are melanocytic tumors that develop at the base of the ear, within the ear canal, or on the pinna of gray horses. They are part of the progressive melanoma syndrome common in aging grays. Most grow slowly, but larger masses can obstruct the ear canal, interfere with tack, or ulcerate. ## Causes Genetic predisposition in gray horses linked to the same mutation that causes progressive graying. Melanocytes proliferate over time. ## Diagnosis Visual and otoscopic examination. Biopsy confirms the diagnosis when needed. Staging evaluates for internal melanomas. ## Treatment Monitoring for small, non-obstructive lesions. Surgical excision, laser ablation, or cisplatin beads for problematic masses. Systemic therapies are under investigation for widespread disease. ## Recovery and Prognosis Good for local control of accessible lesions. The overall melanoma burden in gray horses is progressive. ## Prevention None. Regular monitoring of gray horses allows early intervention.
dark firm nodules at the ear base or in the canal; possible obstruction causing head tilt or discharge; interference with bridle fit; may ulcerate