Pleomorphic Adenoma of External Auditory Canal

Pleomorphic adenoma comprises about 80% of the benign salivary gland tumours and is characterised by a slow growth and a clinically benign course. This tumour is known to occur at various other anatomical locations apart from the major salivary glands. Case reports of this tumour arising from the nasal septum, tongue, turbinate, upper lip, lungs, trachea and lacrimal glands have been found in the literature. But case reports of pleomorphic adenoma from the external auditory canal have been extremely few

Evaluation of Hearing Loss in Tympanic Membrane Perforation

To evaluate and analyse the hearing loss in tympanic membrane perforation based on size, site and duration of perforation. The material for this study was comprised of 100 patients of either sex and of age 15 years and above selected randomly. Size of tympanic membrane perforation was assessed under microscope using calibrated wire look. Patients were divided into three groups according to size; group I (0–9 mm2), Group II (9–30 mm2), Group III (≥ 30 mm2); according to site into anterior and posterior group; according to involvement of malleus into malleolar and non malleolar and according to duration into Group A (<1 year), Group B (1–5 years), Group C (≥ 5 years). Hearing loss was measured in each case with pure tone audiometry. Data was analysed statistically using paired t-test. Hearing loss increased as the perforation size increased [I vs. II (t − 4.23, p < 0.001), II vs. III (t − 8.19, p < 0.001), I vs. III (t − 11.68, p < 0.001)]. Hearing loss was more in posterior quadrant perforation than anterior quadrant perforation but difference was not significant statistically (t − 1.15, p > 0.05). Hearing loss was more in malleolar perforation (t − 5.74, p < 0.001). Hearing loss increased as the duration of disease increased [A vs. B (t − 2.01, p < 0.043), A vs. C (t − 5.49, p < 0.001), B vs. C (t − 4.14, p < 0.001)]