In which stage of neurocysticercosis, there is no edema?
Vesicular
Vesicular colloidal
Granular nodular
Nodular calcified
Ans. d. Nodular calcified (Ref Robbins 9/e1)395, SA, 1)392-393)Surrounding edema is seen in the colloidal vesicular and granular nodular stages.StageCyst wallScolexCommentVesicularNon-enhancingWall defined membraneOnly one ble scolexEccentric hyperdense hole-with-dot" appearanceSuggestive of ble larvaColloidalRing Enhancing with perilesional edemaDegenerating scolexFluid becomes more turbidEarliest stage in the cyst involution - larval degenerationGranularFocal nodular enhancing necrotic lesions with perilesional edemaDegenerating scolexEosinophilic structure Bladder and scolex are in various stages of disintegationCalcifiedSmall hyperdense nodules without perilesional edema