Table 2:

Conditions Associated with Secondary PTCS [2,18,19,20]

Systemic Conditions	Endocrine	Endogenous	Hypoparathyroidism
			Addison Disease
		Exogenous	Human Growth Hormone
			Thyroxine
			Leuprolin acetate
			Anabolic steroids
			Withdrawal of chronic steroids
	Metabolic		Hypervitaminosis A
	Anemia		Anemia
			Leukemia
			Coagulation Disorders
	Renal Failure/ Uremia
	Autoimmune		SLE
			Behcets
	Hypercapnea		Sleep apnea
			Pickwickian syndrome
Genetic Conditions	Turner syndrome
	Trisomy 21
Medications	Antibiotics		Tetracyclines (minocycline, doxycycline)
			Nalidixic Acid
			Sulfa drugs
			Fluoroquinolones
			Nitrofurantoin
	Lithium
	Chlordecone
	Vitamin A derivatives		Isoretinoin
			Trans-retinoic acids
Cerebral venous abnormalities	CSVT
	SVC syndrome
	AV fistulas
	Decreased CSF absorption from previous intracranial infection or SAH
	Hypercoagulable state
	Increased right heart pressure
	Middle ear or mastoid infection
	Bilateral jugular venous thrombosis or surgical ligation