Ear Pathology Online
Histopathological Examination of Ear Biopsy - External Ear
Biopsies and excision
specimens from the pinna and the superficial external auditory canal
are the most common ear specimens received in most diagnostic
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.
Histopathology report :
For inflammatory conditions the report should comment on:
1. Types of inflammation:
- acute, chronic, nonspecific, granulomatous;
- tissues involved, such as cartilage;
2. Presence of :
- necrosis, such as of cartilage
- 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.
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