Quintavalla F, Di Lecce R, Carlini D, Zanfabro M, Cantoni AM. Multifocal cutaneous non-epitheliotropic B-cell lymphoma in a cat.
JFMS Open Rep 2021;
6:2055116920972077. [PMID:
33414925 PMCID:
PMC7750760 DOI:
10.1177/2055116920972077]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Case summary
Skin tumours are the second-most common form of feline cancer after
haematopoietic neoplasms and are often malignant. Cutaneous lymphoma is
uncommon in cats and can be classified as epitheliotropic (typically of
T-cell origin) or non-epitheliotropic (either of T-cell or B-cell origin).
The present study describes a case of multifocal cutaneous
non-epitheliotropic B-cell lymphoma. The skin nodules were multiple and
variable in size; showed rapid progression; were alopecic and erythematous
in appearance and pruritic and ulcerated; and were mostly located on the
trunk. Nodule biopsies revealed the presence of uniform medium-to-large
round neoplastic cells that infiltrated the dermis and subcutis. The
neoplasias were consistent with a round cell cutaneous tumour and did not
show evidence of epitheliotropism. Furthermore, immunohistochemical
assessments indicated an immunophenotype characterised by round cells with a
strong membrane and cytoplasmic positivity for the CD20 antigen, consistent
with a lymphocyte of B-cell origin.
Relevance and novel information
Cutaneous non-epitheliotropic B-cell lymphoma in cats is rare and was
previously reported to appear as single dermal and subcutaneous masses that
are variable in size and generally develop in the tarsal region. To our
knowledge, this is the first report to describe multifocal cutaneous
non-epitheliotropic B-cell lymphoma in a cat.
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