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Hamartomas of the Sweat Gland  

Dr Sampurna Roy MD           





Apocrine naevus:  Pure apocrine nevus is a rare tumour. 

Site: Upper chest and axilla. 

Microscopic features:  Consists of numerous apocrine glands extending from the reticular layer of the dermis to the subcutaneous tissue.

The term 'eccrine hamartomas' is used to include a wide range of nevoid condition involving the eccrine sweat glands.

Eccrine naevus:  These are rare benign lesions characterised by an increase in number and size of normal appearing eccrine coils.

Eccrine angiomatous hamartoma:  There is an increase in eccrine glands together with small blood vessels, nerve fibres, mucin or fat.  

Clinical presentation:  Gradually enlarging painful papule or nodule that may show hyperhidrosis. 

Gross:   Usually solitary flesh-colored or bluish-purple,  painful papule or plaque appearing at birth or during childhood. Site:  Usually located on the extremities.

Porokeratotic eccrine ostial nevus: There are cornoid lamellae associated with eccrine ducts.


Further reading:

Apocrine nevus: light microscopic, immunohistochemical and ultrastructural studies of a case.  

Pure apocrine nevus. A study of light-microscopic and immunohistochemical features of a rare tumor.  

Eccrine nevus.

Hybrid Eccrine Gland and Hair Follicle Hamartoma: A New Entity of Adnexal Nevus.

Eccrine angiomatous hamartoma is a lymphatic proliferation.

An eccrine angiomatous hamartoma with histopathological features of a papillary haemangioma in a neonate.

Eccrine angiomatous naevus revisited.

Adult-onset eccrine angiomatous hamartoma on the vulva.

Eccrine angiomatous hamartoma: a rare skin lesion with diverse histological features.

Eccrine angiomatous hamartoma with massive mucin deposition.

A case of porokeratotic eccrine ostial and dermal duct naevus of late onset.

Widespread porokeratotic adnexal ostial nevus: clinical features and proposal of a new name unifying porokeratotic eccrine ostial and dermal duct nevus and porokeratotic eccrine and hair follicle nevus.

Porokeratotic eccrine ostial and dermal duct nevus: a case report and review of the literature.

Porokeratotic eccrine ostial and dermal duct nevus. Report of a case of adult onset.




Dr Sampurna Roy  MD

Consultant  Histopathologist (Kolkata - India)






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