Mast cells in the pars flaccida of the tympanic membrane.
D000293:Adolescent; D000328:Adult; D000375:Aging; D000818:Animals; D002452:Cell Count; D002648:Child; D006801:Humans; D008407:Mast Cells / Q000166:cytology*; D008875:Middle Aged; D051381:Rats; D014432:Tympanic Membrane / Q000166:cytology*