[Thyrotoxicosis induced by subacute thyroiditis after surgery for a thyrotropinoma].

plasia and treated accordingly. A peripheral blood karyotype performed at 19 years showed two line cells, 45,X/46,XY. The Y chromosome was dicentric, that is, it consisted of two segments coming from two chromatids of the same chromosome.9 Since a karyotype does not always identify the Y chromosome or its fragments, molecular studies or FISH using a Y centromeric probe should be performed in any patient with Turner syndrome having a marker chromosome or a chromosomic sex fragment of unknown origin, and they should be complemented if needed.10 The development of molecular and cytogenetic techniques in recent years made it possible to confirm and guide diagnosis and treatment in the reported case.