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Case Reports
. 2022 Jul;45(7):971-974.
doi: 10.1111/jfd.13625. Epub 2022 Apr 27.

Cutaneous epitheliotropic lymphosarcoma in a captive white catfish (Ameiurus catus Linnaeus)

Ashlyn C Heniff  1 , Laura R Chen  2 , Emily F Christiansen  1   3 , Craig A Harms  1   4 , Jerry M Law  2 , Christian Legner  5 , Keith E Linder  2
Affiliations
Case Reports

Cutaneous epitheliotropic lymphosarcoma in a captive white catfish (Ameiurus catus Linnaeus)

Ashlyn C Heniff et al. J Fish Dis. 2022 Jul.

Abstract

A wild caught white catfish (Ameiurus catus Linnaeus) developed multiple cutaneous masses. Cytology revealed neoplastic lymphocytes and microscopy confirmed dermal infiltration with epitheliotropism in the epidermis, oral mucosa, and cornea, without internal organ involvement. Transmission electron microscopy did not identify viral particles. Histopathology supported cutaneous epitheliotropic lymphosarcoma, a condition most commonly reported in mammals. This is the first reported case of cutaneous epitheliotropic lymphosarcoma in an ictalurid and one of the few published cases of this condition in any fish species.

Keywords: Ameiurus catus; cutaneous epitheliotropic lymphosarcoma; neoplasia; white catfish.

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Conflict of interest statement

The authors have no conflicts of interest to report.

Figures

FIGURE 1
FIGURE 1
White catfish, Ameiurus catus, with cutaneous epitheliotropic lymphosarcoma. (a) Multiple, tan‐white patches, and masses (arrows) are present over the dorsum with ulceration of the cranial dorsal fin. (b) Epidermis over a cutaneous mass with prominent epitheliotropism of neoplastic lymphoid cells that occasionally form intra‐epidermal Pautrier's microaggregates (arrows). Haematoxylin and eosin. Bar =20 micrometres. (c) Transmission electron photomicrograph of the epidermis with epitheliotropism. Round neoplastic lymphoid cells (arrows) expand the intercellular space between keratinocytes (arrowhead) and neoplastic cells have indented nuclei and prominent nucleoli. Bar =2 micrometres
See this image and copyright information in PMC

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