EAC BONEY GROWTHS
EXOSTOSIS = SURFER’S EAR = REFRIGERATION PERIOSTITIS—COLD WATER SWIMMING
MUCH MORE COMMON THAN OSTEOMAS
MALE>FEMALE
REACTIVE
SMOOTH
WHITE
CORTICAL BONE
OCCUR MEDIALLY NEAR THE TM
MULTIPLE OFTEN ON ROOF OF MEDIAL BONEY EAC (ANT/SUP)
MULTPLE
BILATERAL
SYMMETRIC
BROAD BASED(SESSILE-LAMMELLAR BONE)
NON-OCCLUSIVE SMALL
Rx: LEAVE THEM ALONE IF AT ALL POSSIBLE,  REMOVAL IS ASSOC WITH THE HIGHEST INCIDENCE OF IATROGENIC FACIAL NERVE INJURY OF ANY OTOLOGIC PROCEDURES (THE NERVE IS OFTEN LATERAL TO THE ANNULUS).
OSTEOMA
CANCELLOUS BONE COVERED BY A THIN CORTEX
PEDUNCULATED–TRABECULAR BONE
UNILAT
PRIMARILY POST CANAL
SLOW GROWING (NEOPLASTIC)
OCLUSIVE
SINGLE
UNILATERAL