Fontana-Masson stain
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Fontana-Masson stain is a special stain that marks the pigment melanin.
It is also known as Masson-Fontana stain,[1] Fontana-Masson stain for melanin, melanin stain.
- A type of silver stain.
Stains
- Melanin.
- "Argentaffin granules" of the digestive tract.
- Pigment deposition due to minocycline treatment.[2]
Use
- Stain for melanin.
- Displays melanin - whether it be in melanocytes, keratinocytes or melanophages.
- IHC stains, i.e. Melan A, SOX10 or MITF are preferable for displaying melanocytes.
- Used to differentiate brown pigments (lipofuscin, hemosiderin, melanin).[3]
- Used to document Minocycline type II drug induced pigment deposition
- Minocycline pigment, Type II will stain with both the Fontana-Masson stain AND the Perls iron stain.[4]
- Used in the differential diagnosis of hypomelanosis
- Idiopathic hypomelanosis will demonstrate ONLY loss of melanin with the Fontana-Masson stain - melanocytes will not be absent with the Melan A stain.
- Vitiligo will show loss of melanin AND loss of melanocytes with a Melan A stain.
Image:
See also
References
- ↑ Gaitanis, G.; Chasapi, V.; Velegraki, A. (Aug 2005). "Novel application of the masson-fontana stain for demonstrating Malassezia species melanin-like pigment production in vitro and in clinical specimens.". J Clin Microbiol 43 (8): 4147-51. doi:10.1128/JCM.43.8.4147-4151.2005. PMID 16081962.
- ↑ Patterson, JW.; Wilson, B.; Wick, MR.; Heath, C. (Nov 2004). "Hyperpigmented scar due to minocycline therapy.". Cutis 74 (5): 293-8. PMID 15605966.
- ↑ URL: http://education.vetmed.vt.edu/curriculum/VM8054/labs/Lab2/Examples/exfontana.htm. Accessed on: 5 May 2010.
- ↑ Geria AN, Tajirian AL, Kihiczak G, Schwartz RA (2009). "Minocycline-induced skin pigmentation: an update". Acta Dermatovenerol Croat 17 (2): 123–6. PMID 19595269.