title: Papillary Tumor of the Pineal Region: MR Signal Intensity Correlated to Histopathology.
abstract: Tumors of the pineal region are rare and can be challenging to differentiate by imaging. Papillary tumor of the pineal region (PTPR) was recently recognized as a neoplasm in the World Health Organization (WHO) 2007 classification, arising from specialized ependymocytes in the subcommissural organ, which is located in the pineal region. It is a rare histological type of pineal tumor with only a few cases reported. Here, we describe a case of histologically confirmed PTPR in a 17-year-old man who presented with a headache. A literature review was performed to clarify the clinical, radiological, and pathological features of PTPR. Pineal neoplasms do not have pathognomonic imaging findings; however, we discuss T1 hyperintensity, which is a key for imaging diagnosis according to recent reports. In particular, if the hyperintensity in T1 is not due to fat, calcification, melanin, or hemorrhage in a mass of the posterior commissure or pineal region, the diagnosis of a PTPR may be suggested, as observed in this case.
authors: Section of Neuroradiology, Santa Casa de Misericórdia de São Paulo, São Paulo, SP, Brazil ; Centro de Ciências da Saúde, Maruípe, Universidade Federal do Espírito Santo (UFES), 29043-900 Vitória, ES, Brazil.
authors: Marcos
authors: M
authors: Rosa Junior
authors: Section of Neuroradiology, Santa Casa de Misericórdia de São Paulo, São Paulo, SP, Brazil.
authors: Antonio Jose
authors: AJ
authors: da Rocha
authors: Section of Pathology, Santa Casa de Misericórdia de São Paulo, São Paulo, SP, Brazil.
authors: Adriano
authors: A
authors: Zanon da Silva
authors: Section of Pathology, Santa Casa de Misericórdia de São Paulo, São Paulo, SP, Brazil.
authors: Sergio
authors: S
authors: Rosemberg