Temporal malformation

In contrast to the reconstruction of the air, SR and VR also provide a global view of the petrous bone. Such a perspective can be useful in many situations to estimate bony alterations the malformation of the temporal bone that occurs in hemifacial mycro-somia, the surgical resection of bone performed in mastoidectomies, and the presence and extent of fractures. 

The incidence of malformations of the temporal bone is less than 1 %. Malformations are characterised by a deviation from normal anatomical development and regular... 

Fig.2.2a-c. Six-year-old boy with a stable soft tissue mass of the right temporal region, a US shows an heterogeneous hypoechoic well-delimited superficial lesion containing anechoic structures, b The same lesion is compressible and seems not vascularized, c Low velocity flow is detected when the compression is released (venous malformation)... 

Nervous System Local anesthetic field block has been associated with transient brain stem paralysis in two adolescent patients undergoing elective foramen magnum decompression for a Chiari type 1 malformation [13 ]. Perioperative field block with levobupivacaine after woxmd closure was closely associated with absent brainstem reflexes and delayed awakening in both patients. The absence of any structural and biochemical pathology per se and the temporal relationship of the occurrence of brainstem symptoms and local anesthetic infiltration make local anesthetic effects the likely cause in the experience of tire authors. 

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