TUMORS OF THE BRAIN. NEOPLASMS.
Existence inferential with similar external tumors. Cholesterine tumors on plexus of lateral, third or fourth ventricle: pea to egg: in old; concentric layers with abundant exudate. Symptoms: slight, or excitability, dullness, vertiginous paroxysms with sudden congestions, as in encephalitis, sopor, stupor, paresis, coma. Melanoma: mainly meningeal; pea to walnut; with skin melanomata in gray or white horses. Cases. Pigmented sarcomata. Diagnosis, inferential. Psammoma: advanced cholesteatoma, melanoma, fibroma, etc.: osteid tumors. Nervous irritation, delirium, spasms, nervous disorder, and paroxysms. Myxoma: contains mucin: cells (in homogeneous matrix) round, spindle-shaped or stellate. Changes to fat (cholesterin). Œdematous connective tissue, neoplasm. Myxolipoma. Myxo-cystoid. Symptoms.
Tumors in the brain are not marked by distinct pathognomonic symptoms, so that their presence is to be inferred as a probability rather than pronounced upon as a certainty.
The most common forms in the horse are cholesterine (cholesteatoma), melanotic (melanoma), sandy, gritty (psammoma), and fibrous (fibroma).