Sinus histiocytosis
Sinus histiocytosis, abbreviated SH, is a common finding in lymph nodes.
It should not be confused with Rosai-Dorfman disease (also known as sinus histiocytosis and massive lymphadenopathy).
General
- Benign.
- Non-specific finding.
- Frequently associated with infections and neoplasia.[1]
- Reported in association with hip replacements.[2]
Gross
- +/-Enlargement of lymph node.[3]
Microscopic
Features:[4]
- Sinuses distended with histiocytes - key feature.
- Histocytes: abundant foamy cytoplasm, +/-anthrocotic pigment.
- Plasma cells increased.
DDx:
- Rosai-Dorfman disease - histiocytes have a large round nucleus (~2-3x the size of a lymphocyte) with a prominent nucleolus.
- Dermatopathic lymphadenopathy - histiocytes have (melanin) pigment.
- Lymph node metastasis - usually not difficult if one compares with the germinal center macrophages and the primary tumour.
Images
SH - intermed. mag.
SH - high mag.
SH - high mag.
IHC
- CD68 +ve.
- S-100 -ve.
Sign out
- The finding is often ignored; may be signed out as morphologically benign lymph nodes.
See also
References
- ↑ Hartmann, S.; Kriener, S.; Hansmann, ML. (Jul 2008). "[Diagnostic spectrum of reactive lymph node changes].". Pathologe 29 (4): 253-63. doi:10.1007/s00292-008-1003-5. PMID 18504582.
- ↑ Albores-Saavedra, J.; Vuitch, F.; Delgado, R.; Wiley, E.; Hagler, H. (Jan 1994). "Sinus histiocytosis of pelvic lymph nodes after hip replacement. A histiocytic proliferation induced by cobalt-chromium and titanium.". Am J Surg Pathol 18 (1): 83-90. PMID 8279630.
- ↑ Saito, T.; Kuwahara, A.; Kaketani, K.; Hirao, E.; Miyahara, M.; Shimoda, K.; Kobayashi, M. (Mar 1991). "Preoperative assessment of cervical lymph node involvement in esophageal cancer.". Jpn J Surg 21 (2): 145-53. PMID 2051659.
- ↑ Ioachim, Harry L; Medeiros, L. Jeffrey (2008). Ioachim's Lymph Node Pathology (4th ed.). Lippincott Williams & Wilkins. pp. 179. ISBN 978-0781775960.