Clinical profile of silent growth hormone pituitary adenomas; higher recurrence rate compared to silent gonadotroph pituitary tumors, a large single center experience

• Published in: Endocrine Vol. 58; no. 3; pp. 528 - 534
• Main Authors: Langlois, Fabienne, Lim, Dawn Shao Ting, Varlamov, Elena, Yedinak, Chris G., Cetas, Justin S., McCartney, Shirley, Dogan, Aclan, Fleseriu, Maria
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2017; Springer Nature B.V
• Subjects: Acromegaly; Brain tumors; Diabetes; Endocrinology; Growth hormones; Humanities and Social Sciences; Insulin; Insulin-like growth factor I; Internal Medicine; Invasiveness; Medicine; Medicine & Public Health; multidisciplinary; Original Article; Pituitary; Pituitary (anterior); Science; Sinus; Surgery; Tumors; Silent pituitary adenomas; Acromegaly; Silent gonadotroph; Non-functioning; Silent somatotroph adenomas; Silent corticotroph
• ISSN: 1355-008X; 1559-0100
• DOI: 10.1007/s12020-017-1447-6

Purpose Study and comparison of characteristics of silent growth hormone adenomas (SGHA), silent corticotroph adenomas (SCA), and silent gonadotroph adenomas (SGA) in a single institution cohort of surgically treated pituitary adenomas. Methods Retrospective analysis of SGHA surgically resected over 10 years: SGHA was defined as no clinical or biochemical evidence of acromegaly and positive GH immunostaining. Results Of 814 pituitary surgeries; 2.1% ( n  = 17) were SGHA, 4.5% ( n  = 37) SCA, and 18.9% ( n  = 70/371; 2011–2016) SGA. Mean age at SGHA diagnosis was 43 years, with a large female predominance (82%). Mean tumor size and cavernous/sphenoid sinus invasiveness for SGHA, SCA, and SGA were 1.5 ± 1.0 cm and 25%, 2.5 ± 1.2 cm and 43%, 2.9 ± 2.0 cm and 41%, respectively (tumor size p  = 0.009, SGHA vs. SGA, and invasion p ; not-significant). During mean follow-up of 3.9 years, two patients (11%) developed elevated insulin-like growth factor-1 and five patients (29%) required a second surgery for tumor recurrence. Rate of surgical reintervention was similar to SCA (31%), but higher than SGA (10%) ( p  = 0.035, SGHA vs. SGA), and 18% underwent radiation therapy, similar to SCA (19%, p ; not-significant) but higher than SGA (2.9%, p  = 0.018). Conclusion This is the largest single center study characterizing SGHA behavior with SGA and SCA control groups in a cohort of surgically resected pituitary adenomas. SGHA present mostly in young females, and should be closely followed due to their higher likelihood of recurrence and potential of progression to clinical acromegaly. We propose that a complete hormonal staining panel be routinely performed for all pituitary adenomas.