title: Crow-Fukase (POEMS) syndrome: a study of peripheral nerve biopsy in five new cases.
abstract: The pathogenesis of Crow-Fukase (POEMS) syndrome is not well known, and in some cases, a definite diagnosis is difficult to establish. Nerve fibers have been studied in about 120 peripheral nerve biopsies (PNBs), and a mixture of axonal and demyelinating lesions were found in most of them. We report five new cases of Crow-Fukase (POEMS) syndrome with ultrastructural examination of their PNBs. In every case, there were features of axonal degeneration and primary demyelination. Interestingly, uncompacted myelin lamellae (UMLs) were present in every case at a percentage of 1-7. The association of UML and Crow-Fukase (POEMS) syndrome was described 20 years ago but was only reported in a few studies and found in 31 of 41 cases. In fact, this association is very significant because apart from Crow-Fukase (POEMS) syndrome, UMLs can only be found with such a frequency in rare cases of Charcot-Marie-Tooth disease type 1B. UML was also reported in acute and chronic inflammatory demyelinating polyneuropathies but at a much lower percentage. Moreover, in our five cases, UML was frequently associated with a decrease in the number of intra-axonal filaments, and this finding raises the problem of relationships between myelin formation and neurofilaments. So far, glomeruloid hemangiomas present in the dermis of some patients are considered as the only specific criteria of Crow-Fukase (POEMS) syndrome, but we think UML can also be regarded as highly suggestive of this entity on condition that a thorough ultrastructural examination of a PNB is performed.
authors.affiliation: Neuropathology Department, Victor Segalen University, Bordeaux, France. claude.vital@neuropat.u-bordeaux2.fr
authors.forename: Claude
authors.initials: C
authors.lastname: Vital
authors.forename: Anne
authors.initials: A
authors.lastname: Vital
authors.forename: Xavier
authors.initials: X
authors.lastname: Ferrer
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Viallard
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Pellegrin
authors.forename: Sandrine
authors.initials: S
authors.lastname: Bouillot
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Larrieu
authors.forename: Laurence
authors.initials: L
authors.lastname: Lequen
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Larrieu
authors.forename: Christiane
authors.initials: C
authors.lastname: Brechenmacher
authors.forename: Klaus G
authors.initials: KG
authors.lastname: Petry
authors.forename: Alain
authors.initials: A
authors.lastname: Lagueny
mesh_terms: D000368:Aged; D015703:Antigens, CD / Q000378:metabolism; D018951:Antigens, CD20 / Q000378:metabolism; D015214:Antigens, Differentiation, Myelomonocytic / Q000378:metabolism; D001369:Axons / Q000648:ultrastructure; D001706:Biopsy / Q000379:methods; D003711:Demyelinating Diseases / Q000378:metabolism / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods; D066298:In Vitro Techniques; D017493:Leukocyte Common Antigens / Q000378:metabolism; D008214:Lymphocytes / Q000378:metabolism; D008297:Male; D008854:Microscopy, Electron / Q000295:instrumentation / Q000379:methods; D008875:Middle Aged; D009186:Myelin Sheath / Q000378:metabolism / Q000648:ultrastructure; D016878:POEMS Syndrome / Q000134:cerebrospinal fluid / Q000276:immunology / Q000473:pathology*; D010525:Peripheral Nerves / Q000276:immunology / Q000648:ultrastructure*; D000097382:CD68 Molecule
chemical_list: D015703:Antigens, CD; D018951:Antigens, CD20; D015214:Antigens, Differentiation, Myelomonocytic; D017493:Leukocyte Common Antigens; C067980:CD68 antigen, human; D000097382:CD68 Molecule