BACKGROUND: Beckwith-Wiedemann syndrome (BWS) is an overgrowth syndrome with an increased risk of cancer. Most BWS patients show a molecular defect in the 11p15 region that contains imprinted genes. BWS has been associated with malignant neoplasms during infancy. Descriptions of benign tumors, especially in adult patients, are rarer. METHODS/ RESULTS: We report the case of a BWS patient with pituitary adenoma caused by loss of methylation (LOM) at ICR2 (locus CDKN1C/KCNQ1OT1). The patient was referred to an endocrinology unit for suspicion of Cushing's disease due to a history of macroglossia and hemihyperplasia. Biological tests led to the diagnosis of ACTH-dependent hypercortisolism. MRI showed a microadenoma of the pituitary gland, confirming the diagnosis of Cushing's disease. DNA methylation analysis revealed LOM at ICR2 that was in a mosaic state in the patient's leukocytes, but was present in nearly all cells of the pituitary adenoma. The epigenetic defect was associated with a somatic USP8 mutation in the adenoma. CONCLUSION: Pituitary adenoma rarely occurs in patients with BWS. However, BWS should be considered in cases of pituitary adenoma with minor and/or major signs of BWS. The association between ICR2 LOM and USP8 mutation in the adenoma is questionable.
BACKGROUND:Beckwith-Wiedemann syndrome (BWS) is an overgrowth syndrome with an increased risk of cancer. Most BWSpatients show a molecular defect in the 11p15 region that contains imprinted genes. BWS has been associated with malignant neoplasms during infancy. Descriptions of benign tumors, especially in adult patients, are rarer. METHODS/ RESULTS: We report the case of a BWSpatient with pituitary adenoma caused by loss of methylation (LOM) at ICR2 (locus CDKN1C/KCNQ1OT1). The patient was referred to an endocrinology unit for suspicion of Cushing's disease due to a history of macroglossia and hemihyperplasia. Biological tests led to the diagnosis of ACTH-dependent hypercortisolism. MRI showed a microadenoma of the pituitary gland, confirming the diagnosis of Cushing's disease. DNA methylation analysis revealed LOM at ICR2 that was in a mosaic state in the patient's leukocytes, but was present in nearly all cells of the pituitary adenoma. The epigenetic defect was associated with a somatic USP8 mutation in the adenoma. CONCLUSION:Pituitary adenoma rarely occurs in patients with BWS. However, BWS should be considered in cases of pituitary adenoma with minor and/or major signs of BWS. The association between ICR2 LOM and USP8 mutation in the adenoma is questionable.
Authors: Pietro Locantore; Rosa Maria Paragliola; Gianluca Cera; Roberto Novizio; Ettore Maggio; Vittoria Ramunno; Andrea Corsello; Salvatore Maria Corsello Journal: Int J Mol Sci Date: 2022-06-19 Impact factor: 6.208
Authors: Frédéric Brioude; Jennifer M Kalish; Alessandro Mussa; Alison C Foster; Jet Bliek; Giovanni Battista Ferrero; Susanne E Boonen; Trevor Cole; Robert Baker; Monica Bertoletti; Guido Cocchi; Carole Coze; Maurizio De Pellegrin; Khalid Hussain; Abdulla Ibrahim; Mark D Kilby; Malgorzata Krajewska-Walasek; Christian P Kratz; Edmund J Ladusans; Pablo Lapunzina; Yves Le Bouc; Saskia M Maas; Fiona Macdonald; Katrin Õunap; Licia Peruzzi; Sylvie Rossignol; Silvia Russo; Caroleen Shipster; Agata Skórka; Katrina Tatton-Brown; Jair Tenorio; Chiara Tortora; Karen Grønskov; Irène Netchine; Raoul C Hennekam; Dirk Prawitt; Zeynep Tümer; Thomas Eggermann; Deborah J G Mackay; Andrea Riccio; Eamonn R Maher Journal: Nat Rev Endocrinol Date: 2018-01-29 Impact factor: 43.330