Extrarenal Angiomyolipoma: differential diagnosis of retroperitoneal masses

Wroclawski, Marcelo Langer; Baccaglini, Willy; Pazeto, Cristiano Linck; Carbajo, Cristina Nery; Matushita, Chaline; Carneiro, Ariê; Pompeo, Alexandre; Glina, Sidney; Pompeo, Antônio Carlos Lima; Cavalcante, Lívia Barreira

doi:10.1590/s1677-5538.ibju.2016.0670

Cited by 5 publications

(7 citation statements)

References 9 publications

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“…The final and definitive diagnosis is made by examining the biopsy that shows microscopic features of the tumor. [6] In the medical literature, there are some cases similar to ours. Wroclawski et al documented a case of a 51-year-old patient who complained of right lumbar pain for one day.…”

Section: Discussionsupporting

confidence: 65%

“…After conducting the appropriate tests, the patient underwent transperitoneal laparoscopy to remove the mass, and the diagnosis was a mesenchymal lesion compatible with AML. [ 6 ] The case of Tseng et al documented the case of a Chinese woman who presented to the hospital with a complaint of increased waist circumference, and the clinical examination showed the presence of a painless mass with regular edges. After the patient underwent CT and ultrasound, AML was established as the initial diagnosis and confirmed by histopathology after surgical tumor removal.…”

Section: Discussionmentioning

confidence: 99%

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An asymptomatic giant extra-renal retroperitoneal angiomyolipoma: Case report

et al. 2022

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Rationale: Angiomyolipoma is a benign mesenchymal tumor that consists of adipose tissue, muscle cells and blood vessel. Renal angiomyolipomas represent almost one percent of all renal tumors. Patient concerns: We reported a case of a 42-year-old woman complaining of mild abdominal pain with no other symptoms and no remarkable medical history. Diagnosis: Clinical examination was inconclusive and revealed a large, smooth, non-tender, and immovable mass in the right abdomen. Ultrasound examination confirmed the existence of a large, homogeneous, hyperechoic tissue mass. Abdominal multi-slice computed tomography (CT) scans also confirmed the presence of a well-rounded mass in the right abdomen. The histopathology tests confirmed the diagnosis of a large retroperitoneal mass. Interventions: The patient underwent a traditional laparotomy without complications to remove the tumor. Outcomes: The open surgery was the best option, and the patient’s condition improved due to the following-up. Lessons: Retroperitoneal extra-renal angiomyolipomas are extremely rare, and in this case, we document a case of retroperitoneal angiomyolipoma manifested with only mild abdominal pain in Syrian women.

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Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

An asymptomatic giant extra-renal retroperitoneal angiomyolipoma: Case report

et al. 2022

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“…Extrarenal retroperitoneal angiomyolipoma is extremely rare and primarily in the perinephric space 5–11 . Preoperative diagnosis of an extrarenal retroperitoneal angiomyolipoma is challenging because it may mimic other benign or malignant retroperitoneal tumors radiologically, 5–11 as was seen in this case. A few case reports showed intense FAPI uptake in renal angiomyolipomas of the patients without tuberous sclerosis complex 12–14 …”

mentioning

confidence: 72%

“…Angiomyolipomas typically arise within the kidney and may occasionally occur in extrarenal sites of the patients with or without tuberous sclerosis complex 1,5 . Extrarenal retroperitoneal angiomyolipoma is extremely rare and primarily in the perinephric space 5–11 . Preoperative diagnosis of an extrarenal retroperitoneal angiomyolipoma is challenging because it may mimic other benign or malignant retroperitoneal tumors radiologically, 5–11 as was seen in this case.…”

mentioning

confidence: 76%

68Ga-FAPI-04 PET/MRI in a Case of Tuberous Sclerosis Complex With Extrarenal Retroperitoneal Angiomyolipoma

Dong

Yang

et al. 2023

Clin Nucl Med

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Extrarenal retroperitoneal angiomyolipomas are rare benign tumors that may mimic other benign or malignant retroperitoneal tumors. We describe 68 Ga-FAPI-04 PET/MRI findings in a case of tuberous sclerosis complex with an extrarenal retroperitoneal angiomyolipoma and multiple angiomyolipomas involving bilateral kidneys. The extrarenal retroperitoneal angiomyolipoma and most of the renal angiomyolipomas were 68 Ga-FAPI-04-avid. One left renal angiomyolipoma with extensive hemorrhage and fibrosis had no significant 68 Ga-FAPI-04 uptake. Angiomyolipoma should be included in the differential diagnosis of FAPI-avid renal or extrarenal retroperitoneal lesions.

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“…The liver, with over 100 reported hepatic cases[ 7 - 9 ], is reported to be the most frequently involved extrarenal organ. Rare additional sites of reported AMLs include the lung[ 10 , 11 ], spleen[ 12 , 13 ], colon[ 14 , 15 ], heart[ 16 ], skin[ 17 , 18 ], parotid gland[ 19 , 20 ], mediastinum[ 21 ], spermatic cord[ 22 ], nasal cavity[ 23 , 24 ], and retroperitoneal soft tissue[ 25 , 26 ]. The nature of most AMLs is benign, while examples of renal and extrarenal AMLs have described malignant potential[ 1 - 3 , 27 ].…”

Section: Discussionmentioning

confidence: 99%

Epithelioid angiomyolipoma of the pancreas: A case report and review of the literature

Zhu¹,

Niu²,

Yu³

et al. 2021

WJCC

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BACKGROUND Angiomyolipomas (AMLs), belonging to the family of mesenchymal tumors, are considered benign lesions that occur mostly in the kidney or as a part of tuberous sclerosis. Epithelioid AML (EAML) is a rare type of AML that appears to have malignant potential. Extrarenal AMLs usually occur in the liver according to the retrieved literature reports. There have been only two previous reports of monofocal primary AML of the pancreas; however, no cases of primary monotypic EAML of the pancreas have been reported. CASE SUMMARY An asymptomatic 59-year-old woman incidentally revealed a tumor during abdominal ultrasound examination. Routine blood tests and physical examination were within normal limits. Abdominal ultrasound revealed a 1.9-cm hypoechogenic mass in the tail of the pancreas, clearly visualized by endoscopic ultrasound. However, contrast-enhanced abdominal computed tomography scans did not demonstrate the lesion. A subsequent gadolinium-enhanced magnetic resonance imaging scan showed that the lesion had some characteristic manifestations. The lesion was initially thought to be a neuroendocrine tumor (asymptomatic PanNET). After surgical resection, histopathology and immunohistochemistry confirmed the diagnosis of EAML. At the 6-mo follow-up, no recurrence, spread, or metastasis was identified on computed tomography or magnetic resonance imaging. CONCLUSION The preoperative diagnosis of pancreatic AML is extremely difficult. Imaging techniques are essential for providing valuable morphological features for differential diagnosis.

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Extrarenal Angiomyolipoma: differential diagnosis of retroperitoneal masses

Cited by 5 publications

References 9 publications

An asymptomatic giant extra-renal retroperitoneal angiomyolipoma: Case report

An asymptomatic giant extra-renal retroperitoneal angiomyolipoma: Case report

68Ga-FAPI-04 PET/MRI in a Case of Tuberous Sclerosis Complex With Extrarenal Retroperitoneal Angiomyolipoma

Epithelioid angiomyolipoma of the pancreas: A case report and review of the literature

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