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PubMed · 6087141

Pseudoneoplasms in ectothermic animals.

J C Harshbarger
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Abstract

Gross and cytologic similarities between certain non-neoplastic conditions and neoplasms in lower animals including fish, amphibians, and reptiles have invited misinterpretations and contested interpretations. Major categories of pseudo-neoplasms, illustrated by specific examples from material accessioned into the Registry of Tumors in Lower Animals, include infections by foreign organisms which resemble host cells (algal protothecosis and amebic pseudotumors); unusual normal conditions [giant islets of endocrine pancreas (Brockmann bodies) in liver, atypical sites of hematopoietic tissue]; nonparasitic hyperplasia (goiter, ectopic thyroid, erythroblastic proliferation suggestive of pernicious anemia, adenofibrosis); parasite-induced hyperplasia (trematode-induced fibrosis, ciliate-induced monocytic leukocytosis, trematode-induced melanosis, glochidiosis); dysmorphogenesis (teratoid anomalies); virus-induced hypertrophy (lymphocystis); and reactive lesions (metaplasia, regeneration, inflammation).

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AdenocarcinomaAdenomaAdenoma, Bile DuctAmebiasisAmphibiansAnemia, PerniciousAnimalsBile Duct NeoplasmsChondrosarcomaCongenital AbnormalitiesDiagnosis, DifferentialFibromaFish DiseasesFishesGillsGranulomaHematopoiesisHyperplasiaInfectionsInflammationIslets of LangerhansLeukemia, MyeloidLeukemia, Myeloid, AcuteLeukocytosisLiver NeoplasmsLymphangiomaNeoplasmsOdontomaPapillomaParasitic Diseases, AnimalReptilesThyroid GlandThyroid NeoplasmsJournal ArticleResearch Support, U.S. Gov't, P.H.S.Review

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J C Harshbarger. 1984. Pseudoneoplasms in ectothermic animals.. https://pubmed.ncbi.nlm.nih.gov/6087141/

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