Plurihormonal Pituitary Neuroendocrine Tumours – A Single Centre Experience

Introduction. Plurihormonal pituitary neuroendocrine tumours (PitNET)/adenomas are pituitary neuroendocrine tumours composed of monomorphous cell populations expressing anterior pituitary transcription factors and/or hormones belonging to more than one cell lineage. Studies dedicated to plurihormona...

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Published in:International journal of surgical pathology 2024-05, Vol.32 (3), p.470-477
Main Authors: Mihajlović, Milena, Pekić, Sandra, Doknić, Mirjana, Stojanović, Marko, Rašić, Dejan, Miljić, Dragana, Petakov, Milan, Manojlović Gačić, Emilija
Format: Article
Language:English
Subjects:
Acromegaly
Humans
Neuroendocrine tumors
Neuroendocrine Tumors - diagnosis
Neuroendocrine Tumors - pathology
Pituitary Neoplasms - diagnosis
Pituitary Neoplasms - pathology
Retrospective Studies
Transcription Factors
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Summary:Introduction. Plurihormonal pituitary neuroendocrine tumours (PitNET)/adenomas are pituitary neuroendocrine tumours composed of monomorphous cell populations expressing anterior pituitary transcription factors and/or hormones belonging to more than one cell lineage. Studies dedicated to plurihormonal tumours are rare and quite heterogenous with their results, bearing in mind changes in diagnostic criteria and inconsistent use of antibodies for anterior pituitary transcription factors in the diagnostic immunohistochemical panel. Material and Methods. We retrospectively analysed all patients surgically treated for PitNETs from 2016 to July 2022 in a tertiary healthcare institution. All tumours previously diagnosed PitNETs with the word “plurihormonal” were re-examined and potentially re-classified, according to 2022 WHO classification of endocrine tumours. Results. Among 721 patients surgically treated for PitNET in 5.5 years period, the diagnosis of plurihormonal PitNET was established in 11 tumours (1.3%). All tumours showed diffuse and intensive positivity for anterior pituitary transcription factors PIT1 and SF1. Clinically, all patients presented with acromegaly. Conclusions. Retrospective studies related to newly defined plurihormonal PitNETs with a reassessment of diagnoses are necessary due to their rarity and ambition to investigate their origin and biological behaviour. The fact that the majority of plurihormonal PitNETs are clinically presented with acromegaly and show simultaneous positivity to PIT1 and SF1 transcription factors deserve special attention and need for further research in larger cohorts of these exceptional tumours.
ISSN:1066-8969
1940-2465
DOI:10.1177/10668969231183712