Cornual spasm. (a) On an HSG spot radiograph obtained during the early filling stage of the uterus, the right fallopian tube does not opacify beyond the cornual portion (arrow), whereas the left fallopian tube opacifies to the ampullary portion. Arrowheads indicate amorphous calcifications on the right side of the pelvis. These calcifications were also present on the scout image (not shown). (b) On a spot radiograph obtained after the instillation of additional contrast material, the right fallopian tube opacifies to the ampullary portion. Right-sided SIN and a left-sided hydrosalpinx are also noted. Amorphous calcifications (arrowheads) are again seen on the right side of the pelvis. 
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