The first readily identifiable symptom is one whereby the vascular ring has a yellowish coloration and when the tuber is gently squeezed, pillars of cheese-like material emerge from the vessels.
Esimene kindlalt identifitseeritav sümptom on see, kui juhtkoering on kollaka värvusega ning kui mugula kergel pigistamisel ilmuvad soontest juustulaadse aine sambad.