Rosette forming glioneuronal tumor of the fourth ventricle in squash cytology smear.
Rosette forming glioneuronal tumor (RGNT) is a recently recognized and extremely rare glioneuronal tumor occurring in the fourth ventricle. It is crucial for the cytopathologist to be aware of this entity as it can be easily mistaken for more common neoplasms occurring at this site. We present here the cytology of such a rare case of RGNT that was misdiagnosed as ependymoma. The varying cytological features of this entity, as well as the common diagnostic difficulties encountered in cytology, are highlighted in this report.
Department of Pathology, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, Kerala, India.
Amita Radhakrishnan
AR
Nair
Department of Neurosurgery, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, Kerala, India.
Chittoor Viswanathan
CV
Gopalakrishnan
Department of Neurosurgery, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, Kerala, India.
Tirur Raman
TR
Kapilamoorthy
Department of Pathology, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, Kerala, India.
Neelima
N
Radhakrishnan
Fourth ventricle; rosette-forming glioneuronal tumor; squash smear