Forms of neoplasm in gullet of horse, ox, sheep, pig, dog. Symptoms:
dysphagia; eructation; vomiting; bloating; cough; dyspnœa; stertor;
fœtor; palpitation. Treatment.
These have been often noticed in the lower animals. In the _horse_ have
been noticed _melanoma_ (Olivier, Röll, Kopp, Besnard, Pouleau),
_fibroma_ (Dandrieu, Dieckerhoff), Carcinoma (Chouard, Lorenz, Cadeac,
Laurent), epithelioma (Blanc, Lorenz), Leiomyoma (Lucet, Lothes),
cystoma (Caillau, Legrand), mucous cysts (Lucet).
In =cattle papilloma= is especially common, having been noted by
_Johne_, Mons, Fessler, Schütz, Lusckar, Gratia, Beck, Cadeac and Kitt.
=Tubercles=, and =fibroid masses= with cystic purulent centres are not
uncommon. =Actinomycosis= is also frequent, sometimes hard and warty and
at others soft and vascular.
In the =Sheep=, Dandrieu found between the muscular and mucous coats a
hard tumor as large as a hen’s egg, the removal of which put a stop to a
persistent choking. In both =cattle= and =sheep=, swellings from
=coccidiosis= are common; in =cattle= and =swine= from =gongylonema=,
and in =sheep= from =filaria= (Harms) or =spiroptera= (Zurn).
In =pigs=, =fibroma= is met with in the walls of the gullet (Raveski)
and in =dogs= =fibroma=, =papilloma=, and the tumors of spiroptera.
_Symptoms._ The coccidia and spiroptera usually cause few symptoms or
none, but neoplasms usually develop symptoms of obstruction, dysphagia,
eructation, vomiting, and all the indications of choking according to
their seat. These do not come on suddenly and recover as in simple
choking, but even though there may be periodic obstructions, spasms and
paroxysms, there is a slow, progressive advance as the neoplasms
increase. Stertorous or mucous breathing, cough, dyspnœa and fœtid
exhalations are common, the symptoms may be aggravated when the head is
bent, and the tumor may even be felt on palpation of the throat or left
jugular furrow. In ruminants tympany occurs after feeding.
_Treatment_ is surgical and consists in the removal of the tumors by
incision and ecraseur or otherwise. Thoracic œsophagean tumors are
usually inoperable.