Trichoadenoma

Trichoadenoma of Nikolowski is a rare, benign, well differentiated, slowly growing tumour of the hair follicle which was first described in 1958 by Nikolowski.

Site: Face & buttocks. Clinically presents as a solitary papule/nodule.

Microscopic features:

Image1 ; Image2 ; Image3

Well circumscribed dermal tumour ; Multiple squamous islands most of which have a central cystic cavity showing epidermoid keratinization ; Features resemble multiple cross-section of infundibular portion of hair follicles.

Variant: Verrucous trichoadenoma- Clinically resemble seborrheic keratosis ; Composed of small epidermoid cysts ; Abundant keratin on the epidermal surface.

Abstracts:

Trichoadenoma of Nikolowski--review of four decades and seven new cases.Hautarzt. 1998 Dec;49(12):925-8.

Trichoadenoma of the eyelid.Am J Ophthalmol. 1998 Dec; 126 (6):846-8.

Trichoadenoma (Nikolowski). A clinical and histologic case report.Hautarzt. 1984 Dec;35(12):650-2.

Trichoadenoma of Nikolowski. J Cutan Pathol. 1977;4(2):90-8

Soft Tissue Pathology;
Myxoid Tumours of Soft Tissue ; Classification of Soft Tissue Tumour; Gross examination of soft tissue specimen ; A practical approach to histopathological reporting of soft tissue tumours ; Grading of soft tissue tumours ; Lipomatous tumours ;Neural tumours ; Myogenic tumours ; Fibroblastic/Myofibroblastic tumours ; Myofibroblastic tumours ; Fibrohistiocytic tumours ; ChondroOsseous tumours ; Soft TissueTumours of Uncertain Differentiation ; Notochordal Tumour -Chordoma ;Extra-adrenal Paraganglioma ; Gastrointestinal Stromal Tumour ;

Cardiac Path Online;

PRIMARY TUMOURS OF THE HEART ; REPORTING OF CARDIAC TUMOURS ; CARDIAC MYXOMA ;CARDIAC RHABDOMYOMA ; PAPILLARY FIBROELASTOMA ; CARDIAC FIBROMA ; CARDIAC LIPOMA ;CARDIAC HEMANGIOMA ; CARDIAC TERATOMA ; MESOTHELIOMA OF ATRIOVENTRICULAR NODE ;PURKINJE CELL TUMOUR ; CARDIAC PARAGANGLIOMA ; MALIGNANT TUMOURS OF THE HEART ; CARDIAC LYMPHOMA ;

PULMONARY PATHOLOGY:
Congenital Cystic Adenomatoid Malformation ; Acute Respiratory Distress Syndrome ;Sarcoidosis ;Bronchiolitis ; Emphysema ; Bronchial Asthma ;Chronic Bronchitis Pulmonary Alveolar Proteinosis ; Lipid Pneumonia ; Pulmonary Hypertension ;Pulmonary edema ;Pulmonary Infection ; Pneumococcal Pneumonia ; Haemophilus influenza Infection;Klebsiella Pneumoniae ; Mycoplasma Pneumonia ; Pneumocystis Pneumonia ; Legionellosis ; Localized Fibrous Tumour of the Pleura ; Biphasic Epithelial/Mesenchymal Lung Tumours ; Pulmonary Carcinosarcoma ;Pulmonary Blastoma ; Large Cell Neuroendocrine tumour;