Symptoms. Diagnosis. Treatment. 659 



in connection with the right petrous temporal boue and extending under the right 

 half of the cerebellum, along the roots of the facial and auditory nerves as far 

 as the pons and the restiform bodies on the right side (Pr. Mil. Vb., 1891). 

 Paralysis of the facial nerves and complete blindness in cases in which except for 

 large cholesteatomata* in the lateral ventricles no (?) other lesions of the brain 

 were found (Walley). Nystagmus, incoordination of movement, increased sensitive- 

 ness of the limbs (?) due to a tumor situated behind the cerebellum (Eutherford). 

 Paralysis of the left half of the tongue and partial paralysis of the same side of 

 the body owing to the presence of a sarcoma in the left half of the medulla 

 oblongata immediately behind the decussation of the pyramids (Hallander). Twist- 

 ing of the left eyeball in the outward direction was caused by a tumor originating 

 in connection with the petrous temporal bone (Frick). Cadiot and Rogier observed 

 cerebellar ataxia in a dog having a tumor in one-half of the cerebellum. Hebrant 

 noticed unsteady gait, giddiness, swinging movements of the legs, exaggeration of 

 the patellar reflexes, and in the later stages movement in circles to the right and 

 right-sided facial paralysis in a dog having a sarcoma between the posterior vermis 

 of the cerebellum and the right supero-lateral surface of the medulla oblongata. 

 Cad#ac and Eoquet record paralysis of the trigeminal nerve in a dog having an en- 

 dothelioma involving the root of that nerve. In a case recorded by Besnoit of tuber- 

 culosis of the brain with multiple centers the size of a nut and one larger area 

 of softening in the right hemisphere there was blindness on the left side. 



Diagnosis. A diagnosis can only be arrived at when in ad- 

 dition to symptoms of a general nature indicating pressure on 

 the brain, there are local symptoms present. It must lie borne 

 in mind, however, that a more or less similar train of s^anptoms 

 may be caused by animal parasites, abscesses, and in many 

 cases by hydrocephalus internus and chronic meningitis. The 

 differential diagnosis is not difficult Avhen certain accessory cir- 

 cumstances, such as primary neoplasms in some other organ, 

 tuberculosis, alteration of the shape of the cranium, suggest the 

 presence or otherwise of a growth. The diagnosis of a tumor 

 may, in all cases, be based upon the local symptoms, although 

 not with absolute certainty, when these have gradually pro- 

 gressed without intermission, fever is absent, and there is con- 

 gestion of the optic papillae. 



On the grounds of a careful examination of a case occurring in a foal Wolff 

 gives the following symptoms of tumor growth in the region of the pituitary body: 

 Depression, vomiting, congestion of the optic papillse with resulting atrophy of 

 the optic nerves, ptosis, gradually progressive loss of consciousness, retardation 

 of the respirations and pulse. Further investigations must show whether motor 

 and sensory disturbances are also present. 



Treatment. In this connection no experiments have been 

 made upon animals up to the present. No results are to be ex- 

 pected from internal treatment ; at the most long-continued ad- 

 ministration of potassium iodide or some other preparation of 

 iodine might possibly be tried. Provided the diagnosis be prac- 

 tically certain and that it is supposed that the neoplasm is 

 close to the roof of the cranium, surgical interference might be 

 resorted to. 



Literature. Besnoit, Eev. Vet., 1906, 577 (Lit. on cerebral tuberculosis). — 

 Bissauge & Naudin. Eec, 1904, .5.— Cadeac & Eoquet, J. Vet., 1908, 65.— Hamoir, 

 Ann., 1906, 232, 391.— Hebrant, Ann., 1904, 438.— Marchand, Petit & Coquot, Eec, 

 1906, 81.— Marchand, Petit & Pecar, ibid., 1907, 25.— Peter, B. t. W., 1898, 505.— 

 Petit, Bull., 1906, 85. — Eoth, tilier eine intrakran. Dental-exostose usw.. Diss. 

 Zurich, 1888.— Schenk, W. f. Tk., 1906, 705.— Sehmey, A. f. Tk., 1910, XXXVI, 

 121. — Wetzstein, Studien iib. Tuberk. d. Zentr. Nervensvstems, Diss. Ziirich, 1907 

 (Lit. on cerebral tuberculosis).— Wolff, A. f. Tk., 1906, XXXII, 363 (Lit.). 



*See footnote, page 656. 



