No abstract

Intradural cysts should be considered in the differential diagnosis of lesions causing myelopathy and/or a radicular pain syndrome. Microsurgical resection or generous fenestration in cysts with large craniocaudal extensions effectively ameliorated patients' symptomatology. A description of the first documented case of a surgically treated intradural cervical nerve root cyst is provided.

Tumor infiltration of the dura should be assumed in PEMs of the cranial vault, and resection of the dura at the site of craniotomy is recommended to prevent tumor recurrence.

Phorochem. Photohiol. 44 (1986) 5 5 5 ; E. Vogel, M. Kocher, M. Balci, I. Teichler. J. Lex. H. Schmickler, 0. Ermer, Angew. Chem. 99 (1987) 912; Angew. Chem. Int. Ed. Engl. 26 (1987) 931; B. Wehrle, H.-H. Limbach, M. Kocher. 0. Ermer, E. Vogel, ihid. 99 (1987) 914 and 26 (1987) 934; H. (Universitlt Heidelberg) for performing these calculations.[8] In the case of the porphycene parent compound, reaction with bromine also leads exclusively to P-pyrrolic bromination, but the bromine substituent is found in the 2-position, which is occupied by a propyl group in 5. 2-Bromoporphycene is the only isolated monobromination product (unpublished results with K . Pramod and H.-J. Dunnwuhf). This substitution pattern for bromination is different from that of porphyrin, for which regioselective substitution at the methine bridge leads to the formation of 5-bromoporphyrin [H.

The study emphasises the importance of total resection of HPC, defined as a Simpson grade I removal, at first surgery. Adjuvant radiotherapy is recommended after subtotal tumour resections. A life-long vigilant follow-up of these patients is mandatory.