The expression of CD300a and CD300f was shown in MC (Clark et al., 2009), where CD300a presents on MC from nasal polyps, lungs, and on hCBMC (Bachelet et al., 2005) and its mouse ortholog LMIR-1, is expressed on mBMMC (Kumagai et al., 2003). Here, CD300A is linked to Nasal polyposis.