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J Pediatr Endocrinol Metab ; 36(1): 36-42, 2023 Jan 27.
Article in English | MEDLINE | ID: mdl-36394493

ABSTRACT

OBJECTIVES: We have previously shown that pituitary cysts may affect growth hormone secretion. This study sought to determine cyst evolution during growth hormone treatment in children. METHODS: Forty-nine patients with short stature, a pituitary cyst, and at least two brain MRI scans were included. The percent of the pituitary gland occupied by the cyst (POGO) was calculated, and a cyst with a POGO of ≤15% was considered small, while a POGO >15% was considered large. RESULTS: Thirty-five cysts were small, and 14 were large. Five of the 35 small cysts grew into large cysts, while 6 of the 14 large cysts shrunk into small cysts. Of 4 cysts that fluctuated between large and small, 3 presented as large and 1 as small. Small cysts experienced greater change in cyst volume (CV) (mean=61.5%) than large cysts (mean=-0.4%). However, large cysts had a greater net change in CV (mean=44.2 mm3) than small cysts (mean=21.0 mm3). Older patients had significantly larger mean pituitary volume than younger patients (435.4 mm3 vs. 317.9 mm3) and significantly larger mean CV than younger patients (77.4 mm3 vs. 45.2 mm3), but there was no significant difference in POGO between groups. CONCLUSIONS: Pituitary cyst size can vary greatly over time. Determination of POGO over time is a useful marker for determining the possibility of a pathologic effect on pituitary function since it factors both cyst and gland volume. Large cysts should be monitored closely, given their extreme, erratic behavior.


Subject(s)
Central Nervous System Cysts , Cysts , Human Growth Hormone , Pituitary Diseases , Pituitary Neoplasms , Humans , Child , Growth Hormone , Human Growth Hormone/therapeutic use , Cysts/drug therapy , Cysts/pathology , Pituitary Gland/diagnostic imaging , Pituitary Gland/pathology , Pituitary Diseases/drug therapy , Pituitary Diseases/pathology , Pituitary Neoplasms/diagnostic imaging , Pituitary Neoplasms/drug therapy , Pituitary Neoplasms/pathology , Central Nervous System Cysts/diagnostic imaging , Central Nervous System Cysts/drug therapy , Magnetic Resonance Imaging , Retrospective Studies
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