pacificus: shape of bothria and scolex
, wide and short neck, separated opening of cirrus-sac and vagina, and small eggs ([less than or equal to] 57 [micro]m; eggs of D.
The characteristic laminated membrane (L) and germinal layer (G) are illustrated; a scolex
(S) is noted in the center of the field.
The diagnosis of IVNCC is based on clinical presentation, Magnetic Resonance Imaging (MRI) evidence of cystic lesions containing the scolex
and isolating the parasite histologically from the brain lesions or the CSF.
It is unlikely for a neurocysticercosis ring to have more than 20 mm size, midline shift, irregular thick outline (>20mm) and an absence of scolex
in MRI (4-6).
4,8) The adult worms reside in the small intestines of the host, attached by their armed scolex
, and produce proglottids.
In a minority of cases, a scolex
(small, eccentric internal speck of enhancement or calcification within the cyst) may be visualised.
Occasionally pathognomic features of cysticercosis lesion like scolex
or sucking parts of the larva may be demonstrated (8).
Ultrasonography demonstrated a cystic lesion in the superficial lobe with eccentric hyperechoic foci suggestive of a scolex
(the knoblike anterior end of a tapeworm, which has hook-like parts or suckers).
1) Cysticerci have a propensity for developing in the central nervous system (60% of cases) (4) and are classically described as containing an invaginated scolex
(head of organism).
This craspedate cestode has four suckers on an unarmed scolex
In cysticercosis (Figure 16), calcifications are seen in the dead larva (granular-nodular stage) and the typical appearance is that of a small, calcified cyst containing an eccentric calcified nodule that represents the dead scolex
The classical finding in active disease is a cystic lesion with a scolex
(a small point in the center of the lesion), but other lesions also can be related to the disease, and these can be located anywhere in the brain.