A Case of Benign Fibrous Histiocytoma of the Mastoid Antrum / 대한이비인후과학회지

A benign fibrous histiocytoma is a tumor with 6brohlastic and histiocytic differentiation, most commonly found in soft tissues or adult bones. Its occurrence in the ear is, however, extremely rare, and there hasn't been any report on the case originating from the middle ear. We experienced a case of 37-year old male patient who complained of intermittent otorrhea and hearing loss. The patient had an 1 x 1 cm-sized mass in the right mastoid antrum in the temporal bone CT. Under the impression of cholesteatoma or benign tumor, a mass removal was done. A histopathologic investigation of the resected tumor showed typical features of benign fibrous histiocytoma. We herein report along with a brief literature review a case of benign fibrous histiocytoma arising in the mastoid antrum.

A Study on the Position of the Mastoid Antrum of Korean People in the Temporal Bone CT / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Computed tomography of the temporal bone can provide otologists precise informations regarding the middle ear diseases. In this study, we aimed to measure the distance of mastoid antrum using the temporal bone CT for predicting the distance of mastoid depth during the mastoid surgery. MAERIALS AND METHODS: We analyzed normal ears of 88 patients who visited the Department of Otolaryngology, Chonnam University Hospital during the period between Aug. 1996 and Aug. 1997. These patients demonstrated unilateral chronic otitis media, temporal bone fracture, and traumatic facial nerve palsy. RESULTS: The mean distance of mastoid antrum was 11.45mm. The distance of mastoid antrum according to age distribution showed 7.75 mm in 0-4 year old group, 10.35 mm in 5-9 year old group, 10.71 mm in 10-14 year old group, 11.50 mm in 15-19 year old group, and 11.93 mm in over 20 year old group. The distance also differed between males and females, with 2.84 mm for male and 11.24 mm for female. CONCLUSION: For the group under 20 years old, the distance of mastoid antrum increased as the patient's age became older. Especially, the group who were between 5 to 9 years old showed marked increase in the distance, and the distance did not differ between male and female. The distance of the mastoid antrum of the Korean adults was 10.1-13.7 mm and it represents some difference when compared with that of Westerners.