Definition of primary and secondary amenorrhea. Amenorrhea is the medical term for the absence of menstrual periods, either on a permanent or temporary basis. Amenorrhea can be classified as primary or secondary.
Most inherited bleeding disorders are the result of abnormal platelet function or a deficiency in one or more of the factors involved in the blood clotting system. The most serious and common inherited coagulation disorders in dogs are hemophilia(deficiency of factor VIII or IX) and von Willebrand's disease (lack of von Willebrand factor). Other coagulation disorders are discussed here.
Sebaceous hyperplasia, sebaceous adenoma, sebaceous ductal adenoma, and sebaceous epithelioma are very common in the dog and rare in the cat, and the division between these tumors may be âarbitrary.â 84 A review of 172 tumors of the sebaceous gland revealed a preponderance of female representation with sebaceous hyperplasia and an overrepresentation of miniature schnauzers, beagles, poodles, and cocker spaniels. 126,127 Coonhounds, Nordic breeds, and some terriers may also be predisposed ...