Four of the five patients treated for LDD were also diagnosed of CD. The genetic study found PTEN mutations in two of them. Interpretation. LDD has been found to be closely related to CD in this series, in accordance with previous literature. However, the absence of CD diagnosis in one of the patients led us to suggest that, despite the strong association between these two diseases, LDD can also appear as an isolated condition.

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Lymphocytic hypophysitis (LH) is an infrequent primary inflammatory disorder, which is usually diagnosed after surgery for lesions suspected to be pituitary adenomas. Some radiological features have been described that may allow a preoperative diagnosis, such as a symmetric enlargement of the gland with diffuse contrast enhancement extending to the basal hypothalamus in a tongue-like fashion. We describe the case of a patient with LH presenting with the MR imaging of a cystic lesion with ring contrast enhancement. It seems that this appearance in imaging studies is not unusual, and should be considered among the features suggesting this disease in an appropriate clinical context.

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