Palisaded encapsulated neuroma: a unique presentation

ABSTRACT

Palisaded encapsulatee neuroma [PEN] is a genign intraneural neuroma presenting as a solitary, sessile, immobile, asymptomatic, skin-coloured papule or nodule, commonly affecting the butterfly area of the face of a middle-aged person. It is not associated with neurofibromatosis or multiple endocrine neoplasia. We hereby report a unique case presenting with a firm, nodular growth over the posteromedial aspect of right knee which progressively increased in size over one year. On the basis of histopathologic findings, diagnosis of palisaded encapsulated neuroma was made. It is imperative to diagnose it histopathologically, because it is more commonly middiagnosed clinically with schwannoma and neurofibroma