Rahmatullah Zahra F, Chu Linda C, Hruban Ralph H, Fishman Elliot K
Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, 600 N Wolfe St, Baltimore, MD 21287, USA.
Department of Pathology, Johns Hopkins University School of Medicine, 1800 Orleans Street, Baltimore, MD 21287, USA.
Radiol Case Rep. 2025 Jun 19;20(9):4438-4443. doi: 10.1016/j.radcr.2025.05.081. eCollection 2025 Sep.
Peritoneal inclusion cysts (PICs) are rare, benign cystic lesions most often seen in females of reproductive age with a history of peritoneal injury. This case presents a 55-year-old postmenopausal female with no known risk factors who developed a large PIC, causing abdominal pain, fullness, and distention. Imaging, including CT and MRI, revealed a lobulated, fluid-filled mass in the left peritoneal cavity, initially suspected to be a lymphangioma. MRI confirmed the presence of a multilocular cyst with enhancing septa. Surgical exploration identified the cyst as a PIC involving the jejunal mesentery, with final pathology confirming the benign nature of the lesion. While PICs are typically associated with premenopausal females and peritoneal trauma, this case highlights their potential occurrence in postmenopausal age groups without prior insults. The ability to recognize characteristic imaging features-such as cystic lesions with enhancing septa on CT and MRI-can help differentiate PICs from other cystic abdominal masses, including lymphangiomas and neoplastic cystic masses.
腹膜包涵囊肿（PICs）是一种罕见的良性囊性病变，多见于有腹膜损伤史的育龄女性。本病例为一名55岁的绝经后女性，无已知危险因素，却出现了一个巨大的腹膜包涵囊肿，导致腹痛、腹胀和腹部膨隆。包括CT和MRI在内的影像学检查显示，左腹膜腔内有一个分叶状、充满液体的肿块，最初怀疑是淋巴管瘤。MRI证实存在一个有强化分隔的多房囊肿。手术探查发现该囊肿为累及空肠系膜的腹膜包涵囊肿，最终病理证实了病变的良性性质。虽然腹膜包涵囊肿通常与绝经前女性和腹膜创伤有关，但本病例凸显了它们在无既往损伤的绝经后年龄组中发生的可能性。识别特征性影像学表现的能力，如CT和MRI上有强化分隔的囊性病变，有助于将腹膜包涵囊肿与其他腹部囊性肿块，包括淋巴管瘤和肿瘤性囊性肿块区分开来。
