Custom Search

       

 

Ear Pathology Online

Pathology of Squamous Cell Carcinoma of the Middle/Inner Ear

Dr Sampurna Roy MD 

 

Ear Pathology Online - Home Page           Ear Pathology Online -Index 

                                                                                                                      

 

 

Squamous cell carcinoma of the middle ear is a rare tumour.

 It accounts for 1.5% of malignant tumours in the ear.

The patient may have a history of chronic otitis media. Clinically, the patient may complain of aural discharge, conductive hearing loss, pain in the ear,bleeding and facial palsy.

Microscopic features:  Histologically, the tumour is similar in its range of keratinization and epithelial differentiation to tumours of the same histologic type elsewhere in the upper respiratory tract.

Carcinoma in-situ may be present focally adjacent to the invasive carcinoma.

Middle ear corpuscles may be confused with keratinized pearls of squamous carcinoma specially during frozen section. 

Spread:  There is penetration by tumour of the bony wall on the medial wall of the middle ear to infiltrate the carotid canal.

The tumour penetrates the thin layer of bone between the posterior mastoid air cells and the dura with subsequent invasion along the dura and into the internal auditory meatus.

In some cases the cochlea may be infiltrated.

There may be extensive involvement of the inner ear by cancer destroying the lower part of the otic capsule.

In such cases it is assumed that squamous cell carcinoma overcame the biological resistance to neoplastic infiltration which probably exists in the otic capsule and the membranous labyrinth.

 

Further reading:

Squamous cell carcinoma of the temporal bone: a radiographic-pathologic correlation.

Squamous cell carcinoma of the temporal bone arising 43 years after fenestration procedure.

Primary squamous cell carcinoma of the middle ear invading the cochlea. A histopathological case report.

Squamous cell carcinoma of the middle ear.

Squamous cell carcinoma of the middle ear: report of three cases.

Squamous cell carcinoma of the middle ear. A 25-year retrospective study.

 

Ear Pathology Online - Home Page           Ear Pathology Online -Index 

 

 

Dr Sampurna Roy  MD

Consultant  Histopathologist (Kolkata - India)


 

 

Histopathology-India.net

 

Pathopedia-India.com

 

Surgical Pathology.com

 

Pathology-India.com

 

Dermpath-India

 

Infectious Disease Online

 

Pathology Quiz Online 

 

Paediatric Pathology Online

 

Pancreatic Pathology Online

 

Paraganglioma-Online

 

Endocrine Pathology Online

 

Eye Pathology Online

 

Ear Pathology Online

 

Cardiac Path Online

 

Pulmonary Pathology Online

 

Lung Tumour Online

 

Mesothelioma-Online

 

Nutritional Pathology Online

 

Environmental Pathology Online

 

Soft Tissue Tumour Online

 

GI Path Online-India

 

Gallbladder Pathology Online

 

E-book - History of Medicine  

 

Microscope - Seeing the Unseen

 

 roypath.in

 

 

Disclaimer

Privacy Policy  

Advertising Policy

Copyright 2017  histopathology-india.net