Classification & external resources
Simmonds' disease (also Simmonds' syndrome) refers to panhypopituitarism caused by the destruction of the pituitary gland due to infiltrative processes (e.g. lymphocytic), tumours (pituitary adenomas or craniopharyngiomas) or trauma (cranial injury or following surgery).
Additional recommended knowledge
Sheehan's syndrome is a sub-classification of Simmond's disease occurring specifically in the peripartum period.
It was first described by Morris Simmonds when a patient presented with 'fatal cachexia', although his patient went on to live for 11 more years. 
Although cachexia may be present, the disease is characterised by symptoms due to decreased gonadal, thyroidal and adrenal function. These include:
- ^ Simmonds M, (1914) Dtsch. med. Wschr. 40, 322
- ^ synd/2008 at Who Named It
|Endocrine pathology: endocrine diseases (E00-35, 240-259)|
|Thyroid||Hypothyroidism (Iodine deficiency, Cretinism, Congenital hypothyroidism, Goitre, Myxedema) - Hyperthyroidism (Graves disease, Toxic multinodular goitre, Teratoma with thyroid tissue or Struma ovarii) - Thyroiditis (De Quervain's thyroiditis, Hashimoto's thyroiditis, Riedel's thyroiditis) - Euthyroid sick syndrome|
|Pancreas||Diabetes mellitus (type 1, type 2, coma, angiopathy, ketoacidosis, nephropathy, neuropathy, retinopathy) - Hypoglycemia - Hyperinsulinism - Zollinger-Ellison syndrome|
|Parathyroid||Hypoparathyroidism (Pseudohypoparathyroidism) - Hyperparathyroidism (Primary, Secondary, Tertiary)|
|Pituitary||Hyperpituitarism (Acromegaly, Hyperprolactinaemia, SIADH) - Hypopituitarism (Simmonds' disease/Sheehan's syndrome, Kallmann syndrome, Growth hormone deficiency, Diabetes insipidus) - Adiposogenital dystrophy - Empty sella syndrome|
|Adrenal||Cushing's syndrome (Nelson's syndrome, Pseudo-Cushing's syndrome) - CAH (due to 21-hydroxylase deficiency) - Hyperaldosteronism (Conn syndrome, Bartter syndrome) - Adrenal insufficiency (Addison's disease) - Hypoaldosteronism|
|Gonads||ovarian dysfunction (Polycystic ovary syndrome, Premature ovarian failure) - testicular dysfunction (5-alpha-reductase deficiency) - general (Hypogonadism, Delayed puberty, Precocious puberty)|
|Other||Autoimmune polyendocrine syndrome - Carcinoid syndrome - Short stature (Laron syndrome, Psychogenic dwarfism) - Gigantism - Androgen insensitivity syndrome - Progeria - Multiple endocrine neoplasia (1, 2)|