Foetal abdominal cystic lesions generally have their origin in the genitourinary system, such as hydronephrosis, renal dysplasia, ovarian cyst, and
urachal cyst. Additionally, atresia or duplication of gastrointestinal system may be the cause of abdominal cysts.
Urachal remnants may persist in approximately 32% of adults, (1) and clinically they can present as patent urachus (most common), umbilical-urachal sinus, vesicourachal diverticulum, and
urachal cyst (second most common) depending on which portion of the urachus persists.
The
urachal cyst is the most common type of adult urachal abnormality [2].
Features consistent with
urachal cyst with a subcutaneous component (Fig.
The differential diagnosis to be considered on imaging appearance include bladder diverticulum,
urachal cyst, Mullerian duct cyst, or a Seminal vesicle cyst.
Incomplete closure of this embryological communication may result in a urachal fistula, urachal sinus,
urachal cyst or urachal diverticulum (Fig.
Histopathology confirmed the diagnosis of
urachal cyst.
The closest differential diagnosis on antenatal ultrasound of meconium pseudocyst are cystic lesions of ovary,
urachal cyst, mesenteric, omental, and retroperitoneal cysts.
INTRODUCTION: An infected
urachal cyst is one of a spectrum of presentations of urachal pathology, all of which are rare in adulthood.
The differential diagnosis of an adrenal pseudocyst essentially includes all the upper abdominal space-occupying lesions, such as splenic, hepatic, and renal cysts, as well as mesenteric or retroperitoneal cysts,
urachal cysts, and solid adrenal tumours [9, 12, 13, 16].