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Pathology of Ceruminous Adenocarcinoma of the External Ear

Dr Sampurna Roy MD

 

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Ceruminous adenocarcinoma is a rare malignant neoplasm of the glandular structures of the external auditory canal.

The polypoid masses range in size from 0.5 to 3 cm in greatest dimension.

Histologically, the tumors demonstrate a solid to cystic pattern, composed of an infiltrating glandular to cribriform arrangement of epithelial cells.

Histologic features included a dual cell population, increased cellularity, moderate to severe nuclear pleomorphism, irregular nucleoli, increased mitotic figures (mean, 3/10 HPF), including atypical forms, and tumor necrosis.

Tumors are divided into three types of adenocarcinoma based on pattern of growth and cell type - ceruminous, NOS ; adenoid cystic ; mucoepidermoid.

CK7 and CD117 highlight the luminal cells, while S100 protein show a predilection for the basal cells of ceruminous and adenoid cystic carcinomas.

The true incidence and behavior of these rare tumours are still unclear due to confusing terminology, classification and histological definitions.

The prognosis for localized tumours treated by en bloc resection remains excellent, whereas prognosis for extensive lesions might be more dependent on histologic type and grade of tumour.

 

Further reading:

Recurrent ceruminous adenocarcinoma of the external auditory canal.

Ceruminous adenocarcinoma with extensive parotid, cervical, and distant metastases: case report and review of literature

Ceruminous gland carcinomas: a clinicopathologic and immunophenotypic study of 17 cases.

Glandular neoplasms of the external auditory canal--clinical and morphologic observations.

Tumors of the ceruminous glands .

Adenocarcinoma of ceruminous glands. Ultrastructural, immunohistochemical and lectin histochemical studies.

Ceruminous adenocarcinoma: report of a case.

Ceruminoma with intracranial invasion--case report.

Tumors of the ceruminous glands.

Tumors of ceruminous glands.

Intracranial ceruminous gland adenocarcinoma.

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Dr Sampurna Roy  MD

Consultant  Histopathologist (Kolkata - India)


 

 

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