On electron microscopy, ceruminous gland adenoma showed apocrine caps, microvilli, cell junctions, secretory granules, vacuoles, lipid droplets and siderosomes, the characteristic ultrastructural features of apocrine glands.
CONCLUSION: Ceruminous adenomas are rare benign glandular tumor of external auditory canal of ceruminous gland origin.
1-3) Ceruminous glands
are modified apocrine glands of the external auditory meatus; they rarely give rise to malignant change.
At this time, the tumor was diagnosed as a primary adenoid cystic carcinoma of the ceruminous glands.
1) Immunohistochemical and electron microscopic studies of these tumors have demonstrated histologic and ultrastructural features similar to those found in ceruminous glands.
Based on the finding, tumor was confirmed as ceruminous gland adenoma.
Ceruminous gland adenomas are rare neoplastic skin disease of ear of unknown etiology (Moisan and Watson, 1996).
The cartilaginous portion contains loosely bound skin with numerous sebaceous and ceruminous glands
, while the bony portion has a thin skin that is densely adherent to the underlying periosteum.
Bass (2004) stated that Labrador retrievers have increased apocrine and ceruminous glands
which lead to excess glandular secretions (Fig.
Adenoid cystic carcinoma is a rare malignant tumor that affects the major and minor salivary glands, the lacrimal glands, the ceruminous glands
, and occasionally the excretory glands of the female genital tract.
Cerumen refers only to the secretory product of the ceruminous glands
in the external auditory canal, and it is just one component of earwax.