Hyperostosis Frontalis Interna

An idiopathic benign condition, the importance of which stems mainly from the necessity of not mistaking it for pathology. (see Radiopaedia.org here)
It is characterised by thickening of the inner table of the skull anteriorly.
When it is part of the triad of: hyperostosis frontalis interna; obesity; virilism and hirsutism, it is known most commonly as Morgagni’s syndrome, although it has also been referred to as:
Morgagni-Stewart-Morel syndrome
Morel’s syndrome
Morel-Moore syndrome
Morgagni’s triad
Morgagni-Morel-Stewart syndrome
Stewart-Morel syndrome
Stewart-Morel-Morgagni syndrome
References:
1. whonamedit.com
2. StatDx.com
3. Medcylopaedia.com
Credit: Dr Frank Gaillard
http://www.radpod.org