Table 1. Mosaic RASopathies.

Mosaic RASopathy	Gene	Reported mosaic mutations	References
Keratinocytic epidermal nevus	HRAS KRAS NRAS (FGFR3)	G12C, G12V, G13R, Q61L G12D G12D, P34L, Q61R R248C, S249C, G372C	8 8 8 8 , 14 , 45
Keratinocytic epidermal nevus syndrome	HRAS KRAS (FGFR3)	G12S G12D R248C, S249C	19 18 20 - 23
Sebaceous nevus	HRAS KRAS	A11S, G12C, G12D, G12S, G13R G12D, G12V	25 25
Schimmelpenning syndrome	HRAS KRAS	G13R G12D	25 25
Mosaic Costello syndrome	HRAS	G12S	32 , 33
Segmental neurofibromatosis type I	NF1	Various point mutations, deletions, insertions	38 , 39