Cutting needle biopsy combined with immunohistochemical study of myeloperoxidase for the diagnosis of histiocytic necrotizing lymphadenitis.
CONCLUSIONS
Cutting needle biopsy (CNB) combined with immunohistochemical study of myeloperoxidase (MPO) is a useful minimally invasive diagnostic procedure for histiocytic necrotizing lymphadenitis (HNL).


OBJECTIVE
HNL is mainly diagnosed by pathological findings of open surgical biopsy (OSB) specimens. Recently the appearance of anti-MPO positive histiocytes has been reported as a highly specific pathological diagnosis for HNL. Considering the cosmetic impact and burden on the patients, we performed CNB combined with immunohistochemical study of MPO for the diagnosis of HNL. Few studies have reported the utility of this method in the diagnosis of HNL.


METHODS
A retrospective study was conducted using clinical data from 20 HNL patients.


RESULTS
CNB was performed in 8 patients and OSB in 13 (OSB after CNB in 1). MPO-positive histiocytes were observed in all of the 20 cases. The accuracy of the diagnoses was finally confirmed by the clinical courses in all cases.
Departments of Otolaryngology Head and Neck Surgery.
Hiroyuki
H
Hanakawa
Yorihisa
Y
Orita
Yasuharu
Y
Sato
Mai
M
Takeuchi
Kyotaro
K
Ohno
Noriko
N
Iwaki
Toshihiro
T
Ito
Kazunori
K
Nishizaki
Tadashi
T
Yoshino
D000293:Adolescent; D000328:Adult; D001707:Biopsy, Needle / Q000295:instrumentation*; D002648:Child; D003937:Diagnosis, Differential; D004867:Equipment Design; D005260:Female; D006644:Histiocytes / Q000201:enzymology / Q000473:pathology*; D020042:Histiocytic Necrotizing Lymphadenitis / Q000175:diagnosis* / Q000201:enzymology; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods*; D008297:Male; D009195:Peroxidase / Q000378:metabolism*; D015203:Reproducibility of Results; D012189:Retrospective Studies; D055815:Young Adult
D009195:Peroxidase