“Horseshoe Moustache” sign

“Cock-walk” gait and “horseshoe moustache” sign on MRI seen in-

A. Hypermagnesemia

B. Hypermanganesemia

C. Hypernatremia

D. Hyperkalemia

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ANSWER –

Hypermanganesemia

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“horseshoe moustache” sign seen in MRI in hypermanganesemia

Characteristic brain MRI finding is involvement of pontine tegmentum on T1 axial images (due to affliction of central tegmental tract [CTT]) with sparing of ventral pons giving rise to “horseshoe moustache” sign.

Seen in severe hypermanganesaemia

“Cock-walk” gait and “horseshoe moustache” sign on MRI seen in inherited hypermanganesemia

https://pubmed.ncbi.nlm.nih.gov/34993656/