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Ear Pathology Online

Histopathological Examination of Ear Biopsy - External Ear

Dr Sampurna Roy MD

 

                                                                                                                      

 

 

Biopsies and excision specimens from the pinna and the superficial external auditory canal are the most common ear specimens received in most diagnostic laboratories.

Visit: Ear Biopsy: Clinical Details required for the Diagnosis ; Histopathological Examination of Ear Biopsy - Middle Ear ; Histopathological examination of Ear Biopsy- Inner Ear.

Specimens from the Pinna :

These are usually taken for the diagnosis of specific diseases such as Chondrodermatitis Nodularis Helicis , and for the diagnosis and treatment of neoplasms.

It is unlikely that the pinna will have been excised for neoplasia without a previous small biopsy.

Because of sampling problems in these biopsies, the tumour found on the excision specimens may have a different appearance from that diagnosed on biopsy.

A diagnosis of Basal Cell Carcinoma  with small areas of squamous differentiation may be changed to poorly differentiated Squamous Cell Carcinoma on the excision specimen.

Histopathology report :

For inflammatory conditions the report should comment on:

1.  Types of inflammation:

- acute, chronic, nonspecific, granulomatous;

- severity;

- tissues involved, such as cartilage;

2. Presence of :

- necrosis, such as of cartilage

- vasculitis

- ulceration and its depth.

For neoplasms the report should comment on:

- type and differentiation :

- whether there is epithelial dysplasia adjacent to the neoplasm :

- involvement of : (i) cartilage ; (ii) external auditory canal

- proximity of tumour to excision margins.

 

 

                                                                 

Dr Sampurna Roy  MD

Consultant  Histopathologist (Kolkata - India)


 

 

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