1Assistant Professor, Department of Pathology, Maharajah's Institute of Medical Sciences, Vizianagram, Andhra Pradesh
2Professor, Department of Pathology, Bangalore Medical College and Research Institute, Bangalore, Karnataka
*Corresponding author: Dr Seetu Palo, Department of Pathology, Maharajah's Institute of Medical Sciences, 31–15, Near MDO Office, Nellimarla, Vizianagaram District, Andhra Pradesh, India, Pin 535 217. Email: seetu.pearl@gmail.com
Online published on 26 April, 2016.
Malignant proliferating trichilemmal cyst is a very rare adnexal tumor, usually arising on the head and neck region of elderly women. We describe a case of a 45-year-old lady presenting with right cervical region swelling since 6 months. Fine needle aspiration cytology and subsequent excisional biopsy was performed. Histopathology revealed lobules of atypical squamoid cells with high mitotic activity, trichilemmal keratinisation and focal invasion. A diagnosis of malignant proliferating trichilemmal cyst was made. It closely mimics squamous cell carcinoma and therefore, pose diagnostic dilemma for the pathologists.
Malignant, proliferating, trichilemmal, keratinisation, invasion
