Rare diseases · Sign or symptom
J-shaped sella turcica
HP:0002680
What it means
A deformity of the sella turcica whereby the sella extends further anterior than normal such that the anterior clinoid process appears to overhang it, giving the appearance of the letter J on imaging of the skull.
Rare diseases that can present with this2
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Hour glass shaped hypophysial fossa · Hour glass shaped pituitary fossa · Hour glass shaped sella turcica · J-shaped hypophysial fossa · J-shaped pituitary fossa · J-shaped sella · Omega shaped hypophysial fossa · Omega shaped pituitary fossa
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.