​Differential diagnosis of breath odour without coma are : 
-pseudohalithosis / psychiatric 
-benzole 
-botulism 
-cyanide
-fasting 
-hyperemesis gravidarum 
-systemic disorders
-external agents 
-gastrointestinal causes
-respiratory tract causes 
-teeth or mouth causes

​Differential diagnosis of comatose breath odour are : 
-ketoacidosis coma 
-diabetic coma 
-uremic coma 
-hepatic coma 

​Differential diagnosis of decreased hyperprolactinemia are : 
-overdose of dopamine agonist 
-pituitary insufficiency 

​Differential diagnosis of inflammatory, infiltrative and granulomatous diseases causing pituitary stalk damage are : 
-herpes zoster encephalitis 
-histiocytosis 
-sarcoidosis 

​Differential diagnosis of suprasellar tumours causing pituitary stalk damage are : 
-metastasis carcinoma 
-craniopharyngioma 
-lymphomas
-dermoid cyst
 -tumours in hypothalamus 
-parasellar tumours 

​Differential diagnosis of trauma / operation causing pituitary stalk damage are : 
-severance 
-stalk section 

​Differential diagnosis of vascular abnormalities causing pituitary stalk damage is : 
-aneurysm 

​Differential diagnosis of pituitary stalk damage causing hyperprolactinemia are : 
-vascular abnormalities 
-suprasellar tumour 
-operation 
-trauma 
-inflammatory 
-infiltrative 
-granulomatous disease

​Differential diagnosis of neural stimulation causing hyperprolactinemia are : 
-seizures
-spinal lesions 
-nipple stimulation 
-major surgery 
-anesthesia 
-chest wall trauma 

​Differential diagnosis of drugs causing hyperprolactinemia are : 
-vasoactive intestinal peptide 
-TRH 
-thioxanthenes
-sulpiride
-reserpine 
-phenothiazines
-opiates
-neuroleptic 
-metoclopramide
-methyldopa
-imipramine 
-hormones 
-haloperidol 
-high dosage of estrogen therapy of prostate carcinoma 
-dopamine
-butyrophenones
-benzodiazepine 
-anti hypertensive 
-anti histamine 
-anti depressant s
-androgens