Clinical: CDI, hypopituitarism, Imaging: MRI – isointense T1/hyperintense T2 pituitary stalk lesions, Pathology: Granulomas with eosinophils and CD1a/S100 + Langerhans cells, Differential: Germinoma, Final Diagnosis: Pituitary LCH (ICD: C96.6) Here, CD1A is linked to germinoma.