[Skin markers of communicating dermal sinus: report of two cases].

Skin abnormalities in the spinal lumbosacral region of infants are not infrequent. Physicians should look for underlying spinal malformations. We report 2 cases of dermal sinus in infants revealed by severe, acute meningitis.

[Childhood medulloblastoma].

Medulloblastoma is one of the most common malignant childhood brain tumors. It is a primitive neuroectodermal tumor (PNET) and predominantly arises in the cerebellum and 4th ventricle. Most cases of medulloblastoma are sporadic, but some predisposition syndromes are known, such as SUFU and Gorlin syndromes.