Trichoadenoma of Nikolowski- A Rare Tumour with Unusual Presentation Over VulvaCorrespondence Address :
Dr Ashok Sangwaiya,
Assistant Professor, Department of Pathology, Shaheed Hasan Khan Mewati, Government Medical College,
Nalhar, Nuh-122107, Haryana, India.
Trichoadenoma is a rare benign, slowly growing, cutaneous tumour of the hair follicle first described by Nikolowski in 1958. It presents as a non-specific nodule over the face or buttocks. However, unusual sites such as the neck, upper arm, thigh, shoulder, and shaft of the penis may also be affected. The tumour is less mature than a trichofolliculoma and is more differentiated than a trichoepithelioma with a differentiation towards the infundibular portion of the pilosebaceous canal. Histologically, it consists of numerous infundibulocystic structures present throughout the dermis, few of which are lined by eosinophilic epidermal cells with attempted glandular formation and contain laminated keratin, without evidence of hair follicle formation. We report a case of trichoadenoma over the vulva of 25-year-old female showing typical histological features.
Follicular tumour, Horn cyst, Skin malformation, Trichoepithelioma, Trichofolliculoma
Ashok Sangwaiya, Shilpa Bairwa, Shivani Kalhan, Puja Sharma, Rahul N Satarkar. TRICHOADENOMA OF NIKOLOWSKI- A RARE TUMOUR WITH UNUSUAL PRESENTATION OVER VULVA. Journal of Clinical and Diagnostic Research [serial online] 2017 January [cited: 2017 Mar 30 ]; 11:ED05-ED06. Available from
Financial OR OTHER COMPETING INTERESTS: None.
Date of Submission: Sep 18, 2016
Date of Peer Review: Sep 26, 2016
Date of Acceptance: Nov 08, 2016
Date of Publishing: Jan 01, 2017
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