Detailed Sagittal Illustration of the Female Urinary Bladder Containing a Calcium Oxalate Monohydrate Stone

Description

Presented in sagittal section through the adult female pelvis, the urinary bladder sits posterior to the pubic symphysis and anterior to the vagina and cervix, with the urethra continuing inferiorly from the bladder neck along the anterior vaginal wall. Within the bladder lumen, a calcium oxalate monohydrate calculus lies dependently against the posterior-inferior aspect of the cavity, near the bladder base where the trigone would be located. Superiorly, the peritoneal reflection drapes over the bladder dome toward the uterus, reinforcing the close topographic relationship that matters in pelvic surgery and in interpreting midline pelvic imaging. Cystolithiasis in women is less common than in men, so a bladder stone often signals an underlying nidus such as foreign material (suture, mesh), neurogenic bladder with urinary stasis, or recurrent infection, and it changes how you frame the history of dysuria, urgency, suprapubic pain, or terminal hematuria. Calcium oxalate stones are classically hard, and monohydrate composition tends to be denser and more resistant to fragmentation than calcium oxalate dihydrate, a practical point when discussing endoscopic lithotripsy settings and expected operative time. Spatially, the sagittal view also clarifies why even modest outlet obstruction at the bladder neck or urethra can promote residual urine, trabeculation, and stone persistence. Use this artwork in urology and gynecology teaching sessions to anchor pelvic anatomy (bladder neck, urethra, anterior vaginal relationship) while introducing stone composition and management options such as cystoscopic extraction, laser lithotripsy, or suprapubic cystolithotomy. It also fits renal and urinary pathophysiology chapters, clinical skills modules on hematuria workup, and patient-facing education pieces explaining why bladder stones recur when voiding dysfunction is left untreated. Anatomical accuracy verified by SciePro's Medical Advisory Board.