Journal
JOURNAL OF INVERTEBRATE PATHOLOGY
Volume 198, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jip.2023.107913
Keywords
Rhizocephala; Neoplasm; Cancer-like tumor; Parasitic barnacles; Cirripedia; Crustacea
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This article describes a tumor identified in the parasitic barnacle Peltogaster paguri and provides a histological description of its structure. This is the first report of a tumor identified in rhizocephalans and non-decapod crustaceans as a whole.
Cancer-like neoplasms are extremely rarely present in arthropods, particularly in crustaceans. Thus, it is assumed that these animals have some efficient cancer-preventing mechanisms. However, several cases of cancer-like neoplasms are described in crustaceans, though only for the Decapoda. We identified a tumor in the parasitic barnacle Peltogaster paguri (Cirripedia: Rhizocephala), and described its histological structure. A spherical cell mass consisting mostly of roundish cells with big translucent nuclei, prominent nucleoli, and sparse chromatin, and of cells with condensed chromosomes, was found in the main trunk of the P. paguri rootlet system. Numerous mitoses were observed in this area. Such tissue organization is utterly uncharacteristic of the Rhizocephala. Based on acquired histological data, we assume that this tumor is a cancer-like neoplasm. This is the first report of a tumor identified in the rhizocephalans, as well as in non-decapod crustaceans as a whole.
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