However, soft-tissue abnormalities in EAC can include atresia, edema, hemorrhage, keratosis obturans, cholesteatoma, adenoma, ceruminoma, fibroma, mixed tumors, as well as squamous cell, basal cell, and adenocystic carcinoma .
Keratosis obturans and external auditory canal cholesteatoma.
The pathologic features of keratosis obturans and cholesteatoma of the external auditory canal.
Keratosis Obturans (KO) is the accumulation of desquamated keratin appearing as large plug in the external auditory canal.
2] We describe here five cases of keratosis obturans of varying severity from simple to complicated ones.
2,3) This disease is distinguished from keratosis obturans
because cholesteatoma develops after a primary canal bone disorder.
OF CASES TYMPANOPLASTY 444 TYMPANOPLASTY WITH MASTOIDECTOMY 116 EXTERNAL AUDITORY CANAL POLYPECTOMY 23 STAPEDOTOMY 18 TEAR EAR LOBULE REPAIR 15 KERATOSIS OBTURANS
REMOVAL 11 WINDOW OPERATION 10 I & D OF POST AURICULAR ABSCESS 10 PREAURICULAR SINUS EXCISION 5 POSTAURICULAR DERMOID EXCISION 5 Table 2: DISTRIBUTION OF NOSE SURGERIES TYPE OF SURGERY No.
A 17-year-old boy was seen on routine follow-up a few months after he had undergone a right meatoplasty to treat keratosis obturans
1) Until 1980, external auditory canal cholesteatoma and keratosis obturans
were considered to be different presentations of the same disease.
1) The differential diagnosis of an external auditory canal cholesteatoma (EACC) includes keratosis obturans, postinflammatory medial canal fibrosis, malignant otitis externa, and squamous cell carcinoma.
Keratosis obturans is the most difficult to distinguish, and since EACC may require surgical intervention and keratosis obturans is managed medically, distinguishing between these entities is important.
Table 1 Benign and malignant conditions of the external auditory canal Benign Malignant Cholesteatoma Basal cell carcinoma Eosinophilic granuloma Ceruminous gland tumor Exostosis Melanoma Fibrous dysplasia Metastatic disease Keratosis obturans
Soft-tissue sarcoma (children) Neurofibroma Squamous cell carcinoma Osteoma Paraganglioma Stenosis Temporomandibular joint hemiation