Munro's microabscess explained

Munro's microabscess is an abscess (collection of neutrophils) in the stratum corneum of the epidermis due to the infiltration of neutrophils from papillary dermis into the epidermal stratum corneum. They are a cardinal sign of psoriasis^[1] where they are seen in the hyperkeratotic and parakeratotic areas of the stratum corneum.^[2] Munro microabscesses are not seen in seborrheic dermatitis, pityriasis rosea, lichen ruber planus, dermatitis herpetiformis Duhring, dermatitis herpetiformis Duhring.^[3]

It is named for William John Munro (1863–1908).^{[4] [5]}

Notes and References

1. Kaneko F, Itoh N, Yoshida H, Suzuki M, Ono I . The cell-components and cytokines in the subcorneal microabscess of psoriasis . Fukushima J Med Sci . 37 . 2 . 103–12 . December 1991 . 1823882 .
2. Web site: DermPathTutor©-Munro Microabscess . 2009-03-02 . https://web.archive.org/web/20090326075822/http://tray.dermatology.uiowa.edu/DPT/Munro.htm . 2009-03-26 . dead .
3. Book: Braun-Falco. Otto. Dermatology. 978-3540166726. 489. 2000-09-27.
4. Steffen C . William John Munro and Munro's abscess, and Franz Kogoj and Kogoj's spongiform pustule . Am J Dermatopathol . 24 . 4 . 364–8 . August 2002 . 12142621 . 10.1097/00000372-200208000-00016.
5. Johnson, A. 1983. The Man behind the Eponym. William John Munro (1863–1908). The American Journal of Dermatopathology 5(5): 477–478.