Differential Diagnoses in a 20-Year-Old Patient For a 20-year-old patient,…

Differential Diagnoses in a 20-Year-Old Patient For a 20-year-old patient, reproductive and infectious conditions are prominent in the differential diagnosis. However, gastrointestinal, urinary, and musculoskeletal disorders must also be considered. Pregnancy and ectopic pregnancy must be excluded early when pregnancy is biologically possible. An ectopic pregnancy most commonly develops when implantation occurs within a fallopian tube. Continued trophoblastic growth can distend and eventually rupture the tube, resulting in intraperitoneal hemorrhage and potentially life-threatening hemodynamic instability. Therefore, pregnancy status is a fundamental component of acute pelvic pain evaluation in reproductive-aged patients (Stratton, 2026). Pelvic inflammatory disease is another important diagnosis in this age group. PID results from ascending infection of the upper reproductive tract and may involve the endometrium, fallopian tubes, pelvic peritoneum, and adjacent structures. Chlamydia trachomatis and Neisseria gonorrhoeae are important associated pathogens, although PID is frequently polymicrobial (PHAC, 2026). Cervical motion tenderness, uterine or adnexal tenderness, vaginal discharge, fever, and lower abdominal pain increase clinical suspicion. Endometriosis should be considered particularly when pain is recurrent or cyclic and associated with dysmenorrhea, deep dyspareunia, dyschezia, or chronic pelvic discomfort. Current Canadian and American guidance supports earlier clinical evaluation rather than delaying diagnosis until surgical visualization is performed (ACOG, 2026; Singh et al., 2024). Functional or hemorrhagic ovarian cysts may produce unilateral pelvic pain. Rupture can cause sudden pain and intraperitoneal irritation, whereas hemorrhage into a cyst may produce more persistent pain. Adnexal torsion occurs when the ovary, often with the fallopian tube, rotates around its vascular pedicle. Venous and lymphatic obstruction occurs first, followed by impaired arterial perfusion, ischemia, and potentially ovarian necrosis. Sudden severe unilateral pelvic pain accompanied by nausea or vomiting should therefore raise suspicion for torsion. Other considerations include primary dysmenorrhea, mittelschmerz, urinary tract infection, nephrolithiasis, appendicitis, inflammatory bowel disease, and irritable bowel syndrome. Rewrite the above and keep the sources of information