Medical Treatment of a Cystic Macroprolactinoma Mimicking Surgical Excision
MaizaJean-Christophe
Department of Endocrinology and Metabolic Diseases, CHU Reunion, GroupeHospitalierSud-Reunion, BP-350, Saint-Pierre, France
Corresponding author:MaizaJean-Christophe, Department of Endocrinology and Metabolic Diseases, CHU Reunion, GroupeHospitalierSud-Reunion, BP-350, 97448 Saint-Pierre, France. Tel: +33262359363; Email:jean-christophe.maiza@chu-reunion.fr
ReceivedDate:11October,
2017; Accepted Date:17October, 2017;
Published Date:23October, 2017
Citation:Jean-Christophe M(2017)MedicalTreatment of a CysticMacroprolactinomaMimickingSurgical Excision. J Clin EndocrinolMetabDisord:JCEMD-105.
A 17 years-old patient was referred to our institution for suspicion of
delayed puberty. He had no medical
history. Phallus was 7 cm length and testis volume was 10 mL. Secondary sexual
characteristics were scarce. He had no growth retardation. Testosterone level
was 23 ng/dL (normal 32-140) with low gonadotrophins (LH: 4.8 UI/L, FSH: 2.6
UI/L). Prolactin level was 40 ng/mL (normal 3.4-19). Cortisol, TSH, T4l, IGF-1
were in the normal range. MRI revealed a 1 cm pituitary cystic macro adenoma (Figure 1), leading to the diagnosis of cystic
macroprolactinoma. Visual fields were normal. NEM1 and AIP genes were negative.
The patient was treated with dopamine agonist cabergoline 0.5 mg twice a week.
The treatment was poorly tolerated and the cabergoline was thus switched for
quinagolide 75 microgram/day. 3 months later prolactin level was 9 ng/ml and
testosterone reached70 ng/dL. Secondary sexual characteristics progressively
developed. MRI was periodically controlled and 2 years later (Figure 2), the pituitary mass had totally shrunk
mimicking surgical excision.
Optimal management strategies for cystic prolactinomas are poorly
defined. Solid prolactinomas are generally treated with dopamine agonists but
cystic prolactinomas are frequently assumed to be resistant to volume reduction
following dopamine agonists administration and subsequently often treated
surgically [1,2].Nevertheless, a recent study is
in favor to dopamine agonists as primary treatment of cystic prolactinomas [3]. Few data are available concerning their
management particularly in young patients. Our case demonstrates that medical treatment
with dopamine agonists can be efficient and considered before surgical cure
even in young patients with cystic macroprolactinomas.
Figure 1: At diagnosis, coronal T1-weigthed image showed a 1 cm
hyperintense pituitary tumor.
Figure 2: Two years later, MRI was normalized.
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