GOITER— STR UMA—BRONCHOCELE 341 



vcnience to the animal. Reduction in the size of the gland 

 is possible, or it can be extirpated. 



Treatment.— Injections of iodin into the gland substance 

 have given good results. Inject iodin tincture (2.0 to 5.0) 

 into the gland being careful to avoid introducing the needle 

 directly into a bloodvessel. The needle should be inserted 

 unattached to determine this fact before the injection is 

 made. The injections may be repeated after the acute 

 symptoms subside. It is sometimes necessary to make 

 several applications before reduction is complete. Extirpa- 

 tion of the enlarged gland is recommended when of consid- 

 erable size and the fellow gland normal. The operation is 

 performed in the same manner as in parenchymatous goiter. 

 When both glands are enlarged and general symptoms of 

 athyrea are present, potassium iodid, or thyroid extract in 

 small doses is recommended. 



Vascular Goiter.— Definition. — An enlargement of one or 

 both thyroid glands, characterized by dilatation of the 

 blood vessels without the formation of new glandular tissue, 

 and the absence of any marked general symptoms. This 

 condition is not to be confused with exophthalmic goiter. 

 It is the result of a local dilatation of the bloodvessels supply- 

 ing the glands and may originate from the same causes as 

 those producing congestion and inflammation of the glands. 

 The exact etiology is not known, but has been observed as a 

 sequel to distemper, prolonged estrual periods, and sexual 

 diseases. 



Symptoms.— One or both glands will be found enlarged and 

 engorged with blood. Distinct pulsation of the arteries 

 and even the glands can be seen at a distance. In some cases 

 rupture of some of the vessels results, the blood accumulating 

 in the adjacent tissues, producing an extensive enlargement 

 along the course of the neck. The symptoms, as a rule, 

 subside after a few weeks and may recur at more or less 

 regular intervals. Many cases recover spontaneously. Very 

 little general disturbance is present. 



Diagnosis.— The dilatation of the arteries and engorgement 

 of the gland will easily differentiate it from all forms of goiter, 

 except exophthalmic. In exophthalmic goiter, tachycardia, 



