Table 1: Comparison of general and special data about the persistent primitive olfactory artery (PPO A) presented in our and other investigations.

Country [authors] Age* Gender (no.) Initial symptoms DiagnosisPPO A
Incidental findingRelation of number casesVascular sourceSideNozaki’s and new types**Associated variations (no.)Aneurysmatic artery (no.)Other cerebral pathology

Single cases
Korea [18] 24FVertigo3D CTA+ICARI
Serbia [22]35MMyoc.
infarction
Autopsy+ICApRIIIOrigin/end of the right
PCoA
Japan [14]42M3D CTA+ICALIACoA
Japan*** [15]44MHeadacheCTA+(II)Anastom. with left ant. ethm. a.Left fronto-orbital artery
(PPO A)
Intracerebral hem./SAH
Japan [7]54FAnosmiaCereb.
angio.
+ICAL/RIACoA apl.
RAHs apl.
Japan [14]55FCereb.
angio.
+ICALIIICA
Japan*** [16]59F+ICALIACA
Japan*** [17]59FHyposmia+ICARPPO A
Japan [8]59MGeneral seizureCTA+A1-A2R(IV)PPO A-
cort. front. vein shunt
RAH apl.
Intracerebral
hem.
Taiwan*** [21]62FCereb.
angio.
+ICAR(I) Moyamoya ph.
Fetal
PCA
MCA acc.
MCA
occl.
Korea [19]68FHeadacheCTA+ICAR(I)PPO A
bulbous
dilatation
Japan [9]69MLoss of consciousness3D CTA+ICAR(I)ACoA apl.PPO A/left
A1-A2/ ICA
UK [20] 71MGastric carcinomaAutopsy+A1L(II)Double ACoA
Japan [13] 78MHeadacheAxial DynaCT/DSA+A1RTransitory
type (I/II)
PPO A-
ethmoidal anastomosis
Right A1SAH
Retrospective studies
Japan [5] M (1)Clinical or forensic investigations MRA1/900ICAR
Japan [6]CTA/MRA1/3700ICAL
Japan*** [12]5/?ICAPPO A (1)
Korea [11]24
−82
M (17)
F (12)
MRA/CTA29/9841L (19)
R (7)
LR (3)
ACA hypop. (3)
M1 fen (1)
PPO A (2)
ICA (1)
Three cereb. arteriæ (1)  
Japan [10]36
−81
M (6)
F (8)
MRA14/3491L (7)
R (6)
LR (1)
VA fen. (1)
MCA acc. (1)
MACC (1)
MCA (1)
PPO A (1)
Serbia (recent study)0
−95
M (2)Autopsy2/469A1R (2)IA1 fen (1)
MACC (1)

Single cases are aligned according to the age.
Nozaki’s [7] and new types are marked by Romanian numbers.
Data from the paper by Katayama et al. [14].
Female (F); male (M); left (L); right (R); myocardial (myoc.); three-dimensional computer tomography angiography (3D CTA); cerebral angiography (cereb. angio.); digital subtraction angiography (DSA); magnetic resonance angiography (MRA); internal carotid artery (ICA); persistent cranial branch of the internal carotid artery (ICAp); junction of the precommunicating and postcommunicating parts (A1-A2) of the anterior cerebral artery (ACA); posterior communicating artery (PCoA); aplasia of the anterior communicating artery (ACoA apl.); recurrent artery of Heubner (RAH); accessory middle cerebral artery (MCA acc.); posterior cerebral artery (PCA); fenestration of the sphenoid part of the MCA (M1 fen); vertebral artery (VA); median artery of the corpus callosum (MACC); hemorrhage (hem.); occlusion (occl.); subarachnoid hemorrhage (SAH).