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. 2017 May 10;21(1):27–34. doi: 10.1111/vop.12474

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© 2017 American College of Veterinary Ophthalmologists

This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.

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Cytological and immunocytochemical (ICC) findings. (a) Feline infectious peritonitis (FIP)‐typical cytology showing pyogranulomatous inflammation including neutrophils (PMN), macrophages (Mac), rare lymphocytes (Ly), and macrophages containing melanin pigment (Pig). (b) Cytology compatible with FIP showing mixed white blood cells and fibrin threads (Fib). (c) Cytology not indicative of FIP in a case of phacoclastic uveitis containing lense fragments (LF) and band neutrophils (BN). (d) Immunopositive macrophages in a cat with FIP (arrowhead). (e) Autochthonous pigmented cells (Pig) should not be confused with macrophages (arrowhead).