<prompt> Kamla, a 30-yr-old lady examined for infertility by hysterosalpingography, reveals Bead - like fallopian tube and clubbing of ampulla. The most likely cause is:GonococcusMycoplasmaChlamydiaMycobacterium tuberculosis  <response>: The following findings on hysterosalpingogram strongly suggest tubercular salpingitis: A rigid nonperistaltic pipe like tube, called lead pipe appearance Beading and variation in filling density Calcification of the tube Cornual block A jagged fluffiness of the tubal outline Vascular or lymphatic intravasation of the dye Tobacco-pouch appearance seen on naked eye examination.Also Note: In a proven case of genital tuberculosis, hysterosalpingography is contraindicated as it may spread the infection. In TB Endometritis on HSG: The uterine cavity is shrivelled and obliterated by adhesions giving honeycomb appearance. On USG: Incomplete septation of the tubal wall Cogwheel sign is a marker for acute disease. Thin wall and beaded string appearance is a marker for chronic disease. 