Roland Talanow (Cleveland/USA)  

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18 Months  

Male  

Head-Bones  

neoplastic  

1.5 year-old boy with a small, palpable protrudance on the right parietal side.  

Dysontogenic tumor of splitted, not further differentiated cell clusters. The tumor contains mostly epidermis/callous material and connective tissue and is surrounded by a thin membrane. If there are other skin derivatives (glands, etc), one speaks of an epidermoid.  

<- view X-Ray 1

X-Ray 1: 5 x 7 mm large, with slightly sclerosed edges, lesion in the parietal bone.



<- view X-Ray 2

X-Ray 2:
5 x 7 mm large, with slightly sclerosed edges, lesion in the parietal bone.

More common in the parietal bone, but also seen in the occipital bone.

They can be seen within the diploe-structures, but also intracranially, particularly medially. In CT, they are hypo- to isointense, in MRI (in T2 weighted images) hyperintense.

 

Surgery / Histo  

All lytic cranial vault processes, such as:
Histiocytosis X (eosinophilic granuloma)
Neuroblastoma metastases
Leukemic infiltrates
Osteomyelitis
Neurofibromas in Neurofibromatosis
Osteochondroma
Aneurismatic bone cyts  

Often there is a spontaneous remission by epidermoid.  

N/A  

N/A  

N/A  

Epidermoid, cranial vault, child, childhood, pediatric radiology  

Roland Talanow. Epidermoid in the cranial vault. PedRad [serial online] vol 2, no. 3.
URL: www.PedRad.info/?search=20020303165618