Subtypes of T-shaped uterus

OBJECTIVE: To present three different subtypes of T-shaped uterus with the use of three-dimensional (3D) ultrasound imaging and hysteroscopy. DESIGN: Video article. SETTING: Fertility center. PATIENT(S): Three cases showing the different subtypes of T-shaped uterus. INTERVENTION(S): 3D ultrasound imaging and hysteroscopy. MAIN OUTCOME MEASURE(S): Distance between the interostial line and external uterine profile at the midcoronal plane of the uterus obtained with the use of transvaginal 3D ultrasound; delineation of the external uterine contour and the length of any existing internal indentation (defined as the distance between the interostial line and the indentation's edge at the cavity). RESULT(S): It is possible to identify three different subtypes of T-shaped uterus: the most common type of T-shaped uterus, with thick lateral walls and normal fundus (without septum or subseptum appereance) and interostial distance; the Y-shaped uterus, with thick lateral walls, fundal septum or subseptum, and reduced interostial distance; and the I-shaped uterus, with very thick lateral walls (even above the isthmus) and severe reduction of the interostial distance (tubular appearance of the whole uterus). CONCLUSION(S): We solicit to investigate the occurrence of different T-shaped uterus subtypes in large cohorts, to evaluate whether they may have different reproductive outcomes and whether they may need different approaches for surgical correction through hysteroscopic metroplasty.