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Pathology Photo of the Day and 2 questions:

 

              

 

A) What is a "Cornoid Lamella"?

B) It is an important histopathological feature in which skin lesion/lesions?

 

A) Cornoid lamella is a histopathologic reaction pattern  caused by abnormal keratinization.

The important features are:

1) Columns of parakeratotic cells.

2) Granular layer is absent. compare with

3) showing prominent granular layer. 

B) It is the key histologic feature of porokeratosis and its clinical variants.

The most important clinical type of porokeratosis is porokeratosis of Mibelli.

It is an incidental finding in a range of inflammatory, hyperplastic and neoplastic lesions.

Example : Seborrheic keratosis, verruca vulgaris, actinic keratosis, squamous-cell carcinoma in situ (Bowen's disease), basal-cell carcinoma, squamous cell carcinoma and scar.

Visit: Dermpath-India

 

Read:

Porokeratoses: an update of clinical, aetiopathogenic and therapeutic features.

Steroid-responsive facial eruption with cornoid lamellae

 

 

 

 

Dr  Sampurna Roy  MD

Consultant  Histopathologist (Kolkata - India)

          

 

 

 

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