<unk>  is defined as absence of menstrual cycle. The causes of<unk>  include hypothalamic, pituitary, thyroid, adrenal, ovarian, uterine, and vaginal. About 25 different genes are involved in the pathogenesis of<unk>  including 3 different groups of Kallmann syndrome related genes, hypothalamus-pituitary-gonadal (HPG) axis related genes, and obesity related genes. On gross pathology, normal endometrium is the characteristic findings of<unk> . Patients of<unk>  from Craniopharyngioma as have cystic mass filled with motor oil-like fluid on gross pathology. On microscopic histopathological analysis, craniopharyngioma presents as trabecular squamous epithelium surrounded by palisaded columnar epithelium, small-to-medium sized cells with moderate amount of basophilic cytoplasm, bland nuclei, and calcifications. On microscopic histopathological analysis, pituitary adenoma as a cause of<unk>  presents as loss of fibrous stroma and nested cells of normal anterior pituitary (based on the type of adenoma).
Amenorrhea pathophysiology
Urethritis pathophysiology
Prostatitis pathophysiology
Cervicitis pathophysiology
Parotitis pathophysiology
Volvulus pathophysiology
Gonorrhea pathophysiology
Epididymoorchitis pathophysiology