A new clinical examination finding in obstructive sleep apnea; diagonal auricular fold (Frank sign).
Dogan R; Kulaksiz Y; Yeni̇gun A; Kucuk RB; Sutcu AO; Tugrul S; Aksoy F; Ozturan O · 2026 · Sleep & breathing = Schlaf & Atmung
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract (excerpt)
Objective Diagonal ear lobule fold (DELF)(Frank sign); It is a diagonal fold in the earlobe at an angle of about 45°, running diagonally from the tragus to the edge of the auricle at varying depths. In our study, the relationship between…
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Metadata source: Europe PMC · DOI 10.1007/s11325-026-03700-4