Intravascular Papillary Endothelial Hyperplasia of the Central Nervous System-Four Case Reports-

Intracranial Masson's Tumor: A Case Report

This case report presents a unique instance of Masson's tumor, highlighting its atypical presentation and diagnostic challenges. A 19-year-old male patient underwent cranioplasty surgery after presenting with swelling on the frontal scalp. No history of trauma was reported. We compared the preoperative and postoperative results and diagnosed an intracranial Masson's tumor pathologically, which was not detected radiologically. Ensuring complete excision of Masson's tumor stands as the foremost imperative for averting relapse, underscoring the significance of meticulous attention to the aesthetic outcome in cases undergoing concurrent cranioplasty surgery. By elucidating the correlation between the tumor and the patient's symptoms, this report contributes valuable insights into the clinical manifestations and management of this rare intracranial pathology. This addition to the scientific literature underscores the importance of comprehensive evaluation and tailored therapeutic approaches for such cases, ultimately enriching our understanding of Masson's tumor and its clinical implications.

Case report: Multiple brain intravascular papillary endothelial hyperplasia: incidence, diagnostic challenges, and management approach

Multiple hemorrhagic brain lesions are mainly diagnosed based on clinico-radiological features integrated with histological data. Intravascular papillary endothelial hyperplasia (IPEH), or Masson's tumor, is a very rare entity, particularly when localized in the brain. In this study, we describe a case of multiple recurrent brain IPEHs and provide details on the diagnostic phase, therapeutic approaches, and related challenges. A 55-year-old woman presented with a relapsing neurological deficit. Brain magnetic resonance imaging (MRI) revealed a hemorrhagic right frontal-parietal lesion. When new neurological symptoms occurred, subsequent MRI scans detected more bleeding cerebral lesions. She underwent a series of single hemorrhagic lesion debulking. For any samples that underwent histopathological examination, the first results were not informative; the second and the third results revealed hemangioendothelioma (HE); and the fourth results led to the IPEH diagnosis. Interferon alpha (IFN-α) and subsequently sirolimus were prescribed. Both were well tolerated. Clinical and radiological features remained stable 43 months after starting sirolimus therapy and 132 months after the first diagnosis. To date, 45 cases of intracranial IPEH have been reported, mostly as single lesions without parenchymal location. They are usually treated by surgery and sometimes by radiotherapy upon recurrence. Our case is notable for two main reasons: because of the consecutive recurrent multifocal exclusively cerebral lesions and the therapeutic approach we used. Based on multifocal brain recurrence and good performance, we propose pharmacological therapy, including IFN-α and sirolimus, to stabilize IPEH.

Intraventricular Masson tumor: case report and systematic review of primary intracranial intravascular papillary endothelial hyperplasia

Intracranial Masson tumor (intravascular papillary endothelial hyperplasia, IPEH) is a benign lesion that is thought to originate from a reactionary process in response to compromised blood flow. IPEH may be classified into one of three subtypes based on etiology as it may result from the excessive proliferation of endothelial cells within a normal vessel (primary), vascular malformation (type II), or organized hematoma (type III). We report the case of a 79-year-old woman who presented with confusion, gait instability, and urinary incontinence. Neuroimaging revealed a hemorrhagic lesion within the right lateral ventricle, which was successfully resected. To our knowledge, this is the first reported case of an intraventricular IPEH and 33rd case of primary intracranial IPEH. We further performed a systematic review of the literature on all prior type I intracranial IPEH cases and discuss the importance of long-term follow-up in intracranial IPEH.

Papillary Endothelial Hyperplasia of Scalp with Bone Erosion: A Case Report with Review of Literature

Papillary endothelial hyperplasia (PEH) is a reactive pseudoneoplastic proliferation of endothelial cells. They are typically well-circumscribed, indolent lesions and curable by complete excision. Description: We present a four-year-old girl with post traumatic scalp swelling, clinically considered to be a capillary hemangioma. Computed tomography revealed a 3.3 × 1.5 cm scalp mass with erosion of outer table and diploic space of the occipital calvarial bone, suggesting a vascular or soft tissue tumor. Histologically it was a PEH within a hemangioma. Literature Review: PEH presenting as a scalp swelling with bone erosion has only been reported thrice in the literature. Conclusion: Scalp PEH with skull bone defect can affect the pediatric age group. Bone erosion is not stage dependent; it can occur in the early stages.

Masson's tumor presenting as a left frontal intraparenchymal hemorrhage resulting in severe expressive aphasia during pregnancy: case report

Intravascular papillary endothelial hyperplasia (IPEH), commonly known as Masson's tumor, is a benign lesion that manifests as an excessive proliferation of endothelial cells within a vessel wall. IPEH is extremely rare in the brain, with only 36 intracranial cases previously described in the literature. It is commonly mistaken for more malignant pathologies, such as angiosarcoma. Careful histopathological examination is required for diagnosis, as no clinical or radiographic features are characteristic of this lesion. In this first published case of intracranial IPEH presenting during pregnancy, the authors describe a 32-year-old female with a left frontal intraparenchymal hemorrhage resulting in complete expressive aphasia at 28 weeks 6 days' gestation. An MRI scan obtained at a local hospital demonstrated an area of enhancement within the hemorrhage. The patient underwent a left frontoparietal craniotomy for hematoma evacuation and gross-total resection (GTR) of an underlying hemorrhagic mass at 29 weeks' gestation. This case illustrates the importance of multidisciplinary patient care and the feasibility of intervention in the early third trimester with subsequent term delivery. While GTR of IPEH is typically curative, the decision to proceed with surgical treatment of any intracranial lesion in pregnancy must balance maternal stability, gestational age, and suspected pathology.

Vulvar intravascular papillary endothelial hyperplasia or Masson's tumor: A case report

Masson's tumor, also known as intravascular papillary endothelial hyperplasia (IPEH), is a rare and benign vascular disease in which there is a reactive hyperplasia of intravascular endothelial cells. This tumor is most commonly found in soft tissues in the head, neck and upper extremities. We report a rare case of IPEH on the vulva. A Hispanic woman in her mid-thirties presented with a painful and pruritic left vulvar mass. On physical examination, a pedunculated mass was visualized on the left labia majora. Under pathologic examination, it was concluded the lesion was IPEH and it was surgically excised. This is a rare case of IPEH located on the vulva. However, despite this rarity, a simple local excision could be used to manage IPEH.

•

Masson's tumor, also known as intravascular papillary endothelial hyperplasia (IPEH), is a rare and benign vascular disease.

•

IPEH is most commonly found in soft tissues in the head, neck and upper extremities.

•

The tumor is best treated with complete surgical resection.

Intravascular Papillary Endothelial Hyperplasia of the Pineal Region: A Case Report and Review of the Literature

BACKGROUND

Intravascular papillary endothelial hyperplasia (IPEH) is a benign vascular lesion that is uncommon in the central nervous system. To our knowledge, there has been only one previous report of occurrence in the pineal region. We present a second case and a review of the literature.

CASE DESCRIPTION

A 28-year-old woman presented with 1 month of headaches and visual auras. Brain magnetic resonance imaging scan demonstrated a 2.6- × 1.8- × 1.3-cm nonenhancing T1-hypointense, T2-/fluid-attenuated inversion recovery-hyperintense pineal region mass with cerebral aqueduct obstruction and hydrocephalus. She underwent placement of a right extraventricular drain followed by complete surgical resection. Histologic analysis was consistent with IPEH.

CONCLUSIONS

Although rare, IPEH is an entity that should be considered in the differential diagnosis for intracranial masses with radiographic features characteristic of vascular lesions. Tissue sampling is imperative for distinction from more malignant entities. Complete resection is curative and is the standard of care when feasible. Given the risk of local progression and neurologic compromise with subtotal resection of central nervous system lesions, further study regarding adjuvant treatment options is warranted.

Intravascular Papillary Endothelial Hyperplasia (Masson's Tumor) Within Cauda Equina

Objective:

To describe a rare case of intravascular papillary endothelial hyperplasia (IPEH), also called as Masson's tumor, in a patient with the cauda equina syndrome presenting with low back pain and leg pain.

Summary of Background Data:

There are no studies that have reported a case of IPEH within the cauda equina.

Methods:

A 40-year-old man with no prior medical history presented with low back pain and leg pain beginning approximately 5 years ago and a month ago, respectively. MRI revealed a mass at the L2-L3 level that was isointense on T1-weighted images and hypointense with partial areas of high signal intensity on T2-weighted images. A myelogram demonstrated an intradural lesion without any respiratory fluctuation of tumor position, thereby suggesting a metastatic lesion; however, no abnormalities were found on a full-body CT scan or serum investigations for tumor markers. Therefore, surgery was performed on the lesion, within the cauda equina, for diagnosis as well as treatment.

Results:

Histopathological examination of the excised tumor indicated IPEH. The symptoms and quality of life improved postoperatively; there was no recurrence of the lesion.

Conclusion:

This is the first report of an IPEH intradural lesion within the cauda equina.

Study Design:

Case report

Staged Management of Intracranial Masson Tumor: An Unexpected Gauntlet: Case Report and Review of the Literature

BACKGROUND

Intravascular papillary endothelial hyperplasia (IPEH), also known as Masson tumor, is a benign lesion consisting of a reactive proliferation of endothelial cells with papillary formations related to thrombi. It has been reported in many different anatomic areas. Gross total resection is the elected treatment. Intracranial IPEH is rare, and only a few cases have been reported. This article reports a complicated case of cavernous sinus Masson tumor.

CASE DESCRIPTION

A 51-year-old woman presented because of hemicraneal headache, left facial paresthesia, and diplopia (due to a slight left ocular external rectum muscle paresis) that she had experienced the previous 60 days. She had previously received a diagnosis of neurofibromatosis type I. Contrast-enhanced magnetic resonance imaging showed a 3.5-cm contrast-enhanced tumor adjacent to the left cavernous sinus involving the Meckel cave that extended around the distal petrous portion of the left internal carotid artery. Two possibilities as a differential diagnosis were suggested: meningioma or neurogenic tumor. After a staged surgical procedure, the histopathologic findings were unexpected and showed IPEH (Masson tumor) as the cause of the mass. Despite having benign features, the IPEH showed recurrences over time, so adjuvant 3-dimensional conformal radiation therapy was initiated.

CONCLUSIONS

IPEH is prone to recurrences after subtotal resection. In the present case, successful surgical treatment and adjuvant radiotherapy showed an excellent outcome. To date, no adjuvant therapy has been established as a go-to option.

Masson's tumor of the pineal region: case report

Intracranial intravascular papillary endothelial hyperplasia (IPEH), also referred to as Masson's tumor, is a condition that rarely occurs in the nervous system. IPEH most frequently occurs extracranially in the skin of the face, skull, neck, and trunk and can easily be mistaken clinically, radiologically, and histologically for angiosarcoma, organizing hematoma, or other vascular malformations. IPEH accounts for roughly 2% of all vascular tumors and is extremely rare intracranially, with only 23 reported cases compared with more than 300 cases of IPEH occurring in the skin and subcutaneous tissue. To date, it has never been reported to occur in the pineal region. The authors report the case of a patient with an IPEH in the pineal region who underwent complex resection and experienced reversal of neurological symptoms.

Intracerebral Masson's Tumor-Slow-Filling Vascular Lesion Demonstrated by Indocyanine Green Video Angiography

BACKGROUND

Intravascular papillary endothelial hyperplasia, or Masson's tumors, are benign vascular lesions that are rarely seen intracranially. The vascular characteristics of these lesions are also unknown.

CASE DESCRIPTION

We report the case of a 24-year-old male patient with a 3-year history of headache and dizziness. Neuroradiologic imaging showed a slow-growing lesion consistent with a low-grade glioma. Intraoperative appearance was of a vascular lesion that was slow filling as demonstrated with indocyanine green video angiography. Histologic analysis following resection revealed intravascular papillary endothelial hyperplasia (Masson's tumor).

CONCLUSION

Masson's tumors are slow-filling vascular lesions. The preoperative diagnosis of this lesion is difficult as it can mimic a neoplastic lesion. Conservative and surgical treatment options should therefore be carefully considered. Patients with subtotal resection must undergo long-term follow-up surveillance imaging as recurrence is a possibility.

Intravascular Papillary Endothelial Hyperplasia of the Jejunum

Intravascular papillary endothelial hyperplasia is considered to be an unusual form of thrombus organization that is marked by an excessive papillary endothelial proliferation. This lesion has the propensity to occur in the skin and the subcutis. Occurrence in the gastrointestinal tract is very rare. The authors report an exceptional case of a 20-year-old young woman with intravascular papillary endothelial hyperplasia in the jejunum. The patient was referred to the hospital with a 1-week history of melena. The lesion did not recur after surgery. Histopathological examination revealed a papillary endothelial hyperplasia with an underlying arteriovenous malformation.

Intravascular Papillary Endothelial Hyperplasia (Masson's Tumor) of the Radial Artery: A Case Report

Intravascular papillary endothelial hyperplasia (IPEH), often referred to as Masson's tumor, is a benign non-neoplastic vascular lesion of the skin and subcutaneous tissues. Although it is rare, knowledge of the existence of IPEH is important as it can mimic other benign and malignant tumors, most notably angiosarcoma. IPEH remains an incompletely understood entity; however, most consider it to be the result of reactive endothelial proliferation following thrombus formation within a vessel, vascular malformation, or adjacent to a vessel. In this article, we report a case of IPEH arising within an arteriovenous malformation of the radial artery and present accompanying multimodality imaging and pathology figures. We will also describe the clinical presentation, pathophysiology, histology, imaging features, and management of IPEH.

CNS Masson Tumors: Frequent Association With Therapeutic Radiation

Masson tumor (MT, papillary endothelial hyperplasia) is an exaggerated form of thrombus reorganization rarely occurring in the central nervous system (CNS), where it presents as a mass or hemorrhage in parenchyma, meninges, or venous sinuses. MT is subclassified as type 1 arising within a histologically normal vessel, type 2 associated with a ruptured vascular malformation, and extravascular. Limited reports of CNS MT after radiosurgery, or especially external radiation therapy, have emerged. We searched our databases for cases reported from 2008 to present. Nine cases were identified, 6 of which were associated with receipt of therapeutic radiation for known lesions, with intervals of 1 to 25+ years to MT development (4 neoplasms=external beam radiation; 1 neoplasm=external beam radiation+radiosurgery, 1 arteriovenous malformation=radiosurgery). MTs were coassociated with radiation-induced vascular malformations (1 cavernoma-like, 1 massive) only in 2 of 6 irradiated patients, whereas the other 4 had MTs only. The 3 MTs in nonirradiated patients were extravascular, with 1 spontaneously developing in a hemangioblastoma. Seven of 9 MTs were intracerebral, 1 was within the spinal cord, and 1 was subdural. Papillary MT architecture was best appreciated by CD31 or CD34 immunohistochemistry, although ERG verified the endothelial monolayer population. Most CNS MTs at our institution have arisen in patients who have received therapeutic cranial radiation, many of whom received only external beam radiation. Although MTs could conceivably represent early, severe phases in radiation-induced cavernoma development, most were not found coassociated with the latter. This study further extends our knowledge of types of radiation-induced CNS vascular abnormalities.

Thirteen-year follow-up of parasellar intravascular papillary endothelial hyperplasia successfully treated by surgical excision: case report

Intracranial intravascular papillary endothelial hyperplasia (IPEH) is very rare, and to our knowledge long-term follow-up results have not been previously published. An 11-year-old boy presented with a 6-month history of progressive visual impairment in the right eye. Magnetic resonance imaging revealed a well-enhanced, large parasellar mass involving the cavernous sinus, right frontal skull base, and ethmoid and sphenoid sinuses. Frontotemporal craniotomy and subtotal resection were performed, and the diagnosis of IPEH was confirmed. The mass increased in size during the following 3 months. A second operation was performed via frontotemporal craniotomy combined with a transsphenoidal approach, and gross-total resection of the tumor was achieved. Adjuvant radiotherapy (5040 cGy) and chemotherapy with interferon were administered. The patient's visual symptoms improved, and there was no recurrence during a 13-year follow-up period. The results of this case indicate that intracranial IPEH can recur with subtotal resection; however, optimal resection with multimodal adjuvant treatment can control the disease for many years, if not permanently.

Typical MDCT Angiography Findings of an Unusual Cutaneous Neoplasia; Masson Tumor

Background

Intravascular papillary endothelial hyperplasia (IPEH), also known as masson tumour, is a lesion composed of proliferating endothelial cells.

Case Report

In this article we explained clinical, histological and radiological features of IPEH involving the scalp, localized on the left side of the skull and in the periauricular region.

Conclusions

Radiologically, intravascular papillary endothelial hyperplasia could be misdiagnosed as malignant or benign vascular tumour. On cross-sectional imaging it is useful demonstrating the extremely vascular component of IPEH. But IPEH has no specific radiologic features that we can use to differentiate from the aforementioned lesions. Due to that, histopathological examinations are needed to diagnose IPEH.

Orbital intravascular papillary endothelial hyperplasia in a Nigerian child: a case report and review of the literature

INTRODUCTION

Intravascular papillary endothelial hyperplasia is a reactive proliferative lesion of endothelial cells in blood vessels. It typically presents as a painless, reddish purple lesion in the sites affected. The orbit remains an uncommon site of affectation of this relatively common disease. It is noteworthy that this is the first reported case, to the best of our knowledge, of orbital intravascular papillary endothelial hyperplasia in a Nigerian child.

CASE PRESENTATION

The case reported here is an orbital intravascular papillary endothelial hyperplasia causing non-axial proptosis and loss of vision in a 14-year-old Nigerian boy. We describe the clinical and histological findings of intravascular papillary endothelial hyperplasia in the orbit of this 14-year-old boy. The key distinguishing features are discussed and relevant literature is reviewed.

CONCLUSION

Although unusual in presentation, intravascular papillary endothelial proliferation should be considered in the list of differentials of proptosis due to mass lesion in young Nigerians and, possibly, Africans.

Intravascular Papillary Endothelial Hyperplasia (Masson tumor) of the Skull : Case Report and Literature Review

A 10-year-old female patient presented with a rapidly growing nodular mass lesion on her right frontal area. On skull radiography and computed tomography (CT) imaging, this mass had a well-demarcated punch-out lesion with a transdiploic, exophytic soft tissue mass nodule on the frontal scalp. Magnetic resonance (MR) imaging revealed the presence of a 1.5×1.2×1 cm sized calvarial lesion. This lesion was hypointense on T1 and heterogenous hyperintense on T2 weighted MR images, and exhibited heterogeneous enhancement of the soft tissue filling the punch-out lesion after intravenous administration of gadolinium. En block removal of the tumor with resection of the rim of the normal bone was performed. The pathological diagnosis was intravascular papillary endothelial hyperplasia (IPEH). After surgery, no recurrence was found for 8 months. IPEH is a rare and benign reactive lesion usually found in thrombosed subcutaneous blood vessels. Involvement of skull bone is rare. In this article, we present a case of IPEH involving the calvarium, in a 10-year-old woman.

Rare Tumors of the Sellar Region

Context

The sellar/ parasellar region is the location for a vast array of neoplastic and nonneoplastic intracranial space-occupying lesions. While several common lesions arising in this location have been well-described in the literature, there are rare and challenging tumors that may also arise in this region.

Objective

We focus this review on five rare tumors reported to arise in the sellar region, including spindle cell oncocytoma of the adenohypophysis, pituicytoma, intravascular papillary endothelial hyperplasia, epithelioid hemangioendothelioma and xanthogranuloma. We review their clinical presentation, histologic features, differential diagnosis and outcomes for these tumors.

Data sources

All medical literature pertaining to these entities that was searchable on PubMed was comprehensively reviewed.

Conclusions

Spindle cell oncocytoma and pituicytoma have recently been included in the 2007 edition of the World Health Organization classification of tumours of the CNS, while intravascular papillary endothelial hyperplasia, epithelioid hemangioendothelioma and xanthogranuloma have only rarely been described in this region. Knowledge of these may help prevent possible diagnostic pitfalls during postmortem evaluation.

Intracranial Masson tumor: case report and literature review

Intravascular papillary endothelial hyperplasia (IPEH) or Masson tumor has only been reported intracranially in 20 cases and can present as a congenital finding. This pathologic entity is an important diagnostic consideration when evaluating an infant with a congenital intracranial mass. We report a third case of a neonate who presented with the appearance of a metastatic brain tumor involving the orbit, sella, and cerebellum that was ultimately proven to be IPEH. A thorough literature review of IPEH is presented and we discuss this clinical entity and its management.

Extravascular Papillary Endothelial Hyperplasia Mimicking Neoplasm After Radiosurgery

BACKGROUND AND IMPORTANCE:

Papillary endothelial hyperplasia (PEH) is a rare form of exuberant reactive endothelial proliferation that can mimic neoplasm. We report the largest series of patients with histologically confirmed intracranial extravascular PEH developing in the field of previous treatment with stereotactic radiosurgery.

CLINICAL PRESENTATION:

We collected the clinical, radiological, surgical, and pathological findings from 4 patients in whom intracranial extravascular PEH developed after treatment with stereotactic radiosurgery. In all patients, the development of an enlarging hemorrhagic mass lesion at the site of previous radiotherapy on magnetic resonance imaging was radiographically suspicious for neoplasm and prompted biopsy or resection. All 4 patients elected to undergo biopsy or surgical resection. Histological examination of the biopsy and resection specimens in all patients demonstrated the classic features of PEH.

CONCLUSION:

The interval to the development of PEH ranged from 5 months to 6 years, 10 months. Clinical follow-up was available for 3 of the 4 patients. None of these 3 patients have demonstrated evidence of recurrence during a mean follow-up period of 22 months (range, 15–30 months). These patients share common radiological features, potentially allowing preoperative diagnosis and improved guidance of clinical management. These cases suggest a link between radiosurgery and the development of PEH. These findings also suggest that PEH should be considered in the differential diagnosis for patients treated with radiosurgery in whom a hemorrhagic mass lesion subsequently develops at or near the site of previous treatment. We think that complete surgical excision is the best treatment for intracranial PEH.

Papillary endothelial hyperplasia presenting as recurrent malignant glioma

The initial management of patients with malignant gliomas depends on accurate histologic diagnosis which, in turn, directs appropriate treatment planning. However, the diagnosis of recurrent disease is often based solely on radiological data which can occasionally be misinterpreted as showing recurrent tumor. Lack of awareness of conditions that mimic recurrent tumor and potentially confound radiological diagnosis can lead to inappropriate therapeutic decisions. We report the case of a patient whose imaging studies suggested recurrence of malignant glioma; however, surgical resection of the lesion guided by MRI scans resulted in the correct diagnosis of papillary endothelial hyperplasia and led to appropriate management of this condition that mimicked tumor recurrence. In this report, we provide a comprehensive review of this rare entity and emphasize the importance of adequately pursuing appropriate diagnostic considerations prior to making definitive treatment decisions.

Intravascular Papillary Endothelial Hyperplasia of the Renal Vein

Intravascular papillary endothelial hyperplasia (IPEH) is a benign, florid proliferation of endothelial cells forming hyaline papillae covered by monolayered cells, which has rarely been described in the renal vein, most often being equated to tumors because of the difficulties in correctly interpreting imaging findings and accordingly treated by nephrectomy. If the kidney is end-staged for preexisting medical diseases, the risk of overtreatment is obviously negligible, but overdiagnosing IPEH as an intravascular tumor, either benign or malignant, may be perilous for the patient because of the possible consequences on the clinical management.

Masson's tumour in the right parietal lobe after stereotactic radiosurgery for cerebellar AVM: case report and review

We present a 50-year-old patient who had undergone stereotactic radiosurgery for a cerebellar vermian arteriovenous malformation. On routine surveillance MR imaging a lesion suggestive of a meningioma was demonstrated and removed. Histologically it was found to be intravascular papillary endothelial hyperplasia (Masson's tumour). The characteristic radiological and histological findings are presented. Aspects of management of this rare tumour are discussed. Given that cases are often found in combination with a vascular abnormality, we discuss the possibility of a change in local haemodynamics after radiosurgery promoting development of this tumour.