A rare case of Rosai-Dorfman disease presenting as a pulmonary artery mass in a 33-year-old female with hypoxia.

Rosai-Dorfman disease (RDD) is a rare form of non-Langerhans histiocytosis. It is often idiopathic in etiology, but has been associated with viral, autoimmune, and malignant disease. Adequate diagnosis of RDD requires a combination of clinical symptoms, radiography, and histology.

An Unusual Cause of Recurrent Urinary Retention in an Adolescent Female.

Herlyn-Werner-Wunderlich syndrome (HWWS) is a rare, combined Mullerian and Mesonephric duct anomaly characterized by the triad of uterus didelphys, obstructed hemivagina and ipsilateral renal agenesis. We present the case of an otherwise healthy 16-year-old female with acute urinary retention secondary to HWWS. The diagnosis was established with abdominal ultrasound and Magnetic Resonance Imaging (MRI).