BACKGROUND: An infantile @entity20393 (IM) is a benign congenital soft-tissue @entity5 . IM is found in 1 per 150,000 live births, making it the most common @entity5 of infancy and early childhood. CASE DESCRIPTION: We report on a full-term neonate presenting with an irregular @entity5 mass on the right lower-arm. The mass measured 5 cm in diameter, with surface ulceration. Magnetic resonance imaging (MRI) revealed characteristics that could be consistent with @entity5 . On the basis of a biopsy and subsequent polymerase chain reaction we were able to make a diagnosis of 'benign infantile @entity20393 '. We chose for conservative treatment in the expectation that the @entity5 would regress spontaneously. CONCLUSION: Infantile @entity20393 should be considered when a newborn presents with an atypical mass. It is difficult to make a diagnosis on the basis of the clinical characteristicsalone due to the heterogenous presentation. A definitive diagnosis can only be made following histological investigation.

[Infantile XXXX : a neonate with a swelling on the arm].

@entity5 :: ('MESH:D009369', 'Disease') :: ['fibrous tumour', 'malignancy', 'tumour'] @entity20393 :: ('MESH:D047708', 'Disease') :: ['myofibroma']
@entity20393 :: (MESH:D047708,Disease) :: ['myofibroma']
