Have Progestin Related and Sporadic High Grade Meningiomas the Same Natural History?

doi:10.21203/rs.3.rs-680956/v1

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Have Progestin Related and Sporadic High Grade Meningiomas the Same Natural History?

https://doi.org/10.21203/rs.3.rs-680956/v1

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Introduction: High grade progestin related meningiomas have been reported in recent series but we found no previous study describing their long-term outcome. Our study aimed to evaluate patients operated on for high grade intracranial meningioma and who underwent long term exposure to high dose of cyproterone acetate, nomegestrol acetate and chlormadinone acetate.

Methods: Our study retrospectively included 9 patients with high grade progestin related intracranial meningioma between December 2006 and December 2020. In each patient, clinico-radiological follow-up was performed every 6 months after diagnosis and treatment withdrawal recommendation.

Results: The mean progestative exposure was 11.4 years. Edema existence or absence of cleft sign on MRI were the key factors for surgical indication. All patients underwent surgery. Ajduvant radiotherapy was indicated in 1 patient, and Gamma Knife Radiosurgery was proposed in 2 other patients for a second location of mengioma. 6 patients harbored a grade II chordoïd meningioma subtype with 100% PR expression and 3 patients a grade II atypical meningioma subtype with lower PR expression. The mean follow-up was 7.1 years and none of the 9 patients presented with a recurrence.

Conclusion: Patients with Grade II progestin related meningiomas have less tumor recurrence after surgery than patients with sporadic high grade meningomas, especially after progestin withdrawal. The presence/ appearance of peri-meningioma edema and the absence of cleft sign before volumetric change should suggest the existence of an underlying high grade meningioma. In these cases, surgical resection may immediately be considered and adjuvant radiotherapy should be reserved for proven recurrence cases.

Neurology

Oncology

high grade meningioma

progestin related meningiomas

cyproterone acetate

nomegestrol acetate

chlormadinone acetate

Intracranial meningiomas are extra-axial tumors arising from arachnoid tissue. Meningiomas are the most frequent primary tumors and are in most cases benign (grade I according to 2016 WHO’s classification). In 2007, Gazerri and al. [1] published the first case of growing meningioma under feminizing endocrine regimen of ethinyl estradiol and cyproterone acetate (CA) in a transsexual patient. Several reports[1-23] have documented an increased risk of meningioma development in patients with long term progestative treatment but causal relationship remains difficult to prove. Similarly, some authors reported a relationship between long term nomegestrol acetate (NA)[8, 13, 24-26] or chlormadinone acetate (ChlA)[13, 15, 25, 27] treatment and meningioma development. Meningioma regression after CA withdrawal is reported by many authors[2-5, 7-10, 12-15, 19, 21-24, 26, 28] in one third of cases especially for anterior and middle skull base locations. This feature and a higher rate of multiple meningiomas suggest a strong relationship between this hormonal treatment and meningioma development. Therefore, delayed treatment of hormonal induced meningiomas with close clinical and MRI follow-up is recommended by several authors[3, 8, 9, 13, 19, 22, 23, 26, 28] in asymptomatic patients. Nevertheless, this management still needs further evaluation. Despite recent publications[9, 13, 15, 17-19, 22, 27] in which high grade hormonal induced meningiomas were found, no study concerning their specific long-term outcome is reported. Concerning sporadic meningiomas, recent studies reported a 15-20% rate of high grade meningioma[13, 27, 29-33]. The progression-free survival rate (PFSR) of patients harboring a sporadic grade II meningioma is approximately 50% at 5 years questioning in these cases the indication for adjuvant radiation therapy[29-31, 33-35]. The optimal timing of radiation therapy after surgery is still under evaluation[34].

Our study aimed to evaluate the outcome of patients with high grade intracranial meningioma who underwent long term exposure to high dose of CA, NA and ChlA.

Patients

After ethics committee agreement, we retrospectively collected 152 consecutive adult patients with intracranial meningioma and exposed to one of the 3 progestatives incriminated in meningioma development between December 2006 and December 2020. Of the 43 patients who underwent surgery we included 9 patients with high grade meningioma.

Meningioma management in our institution

Based on previous knowledges, progestative withdrawal was always recommended to all patients after meningioma diagnosis. Observation after diagnosis was systematically performed in all asymptomatic patients (incidental finding or screening) or patients presenting with mild headache without neurological deficit, regardless tumor volume or number of tumors. All patients presenting with neurological deficit and/or with peritumoral brain edema were systematically proposed for treatment. Clinical and radiological evaluation using MRI was performed every six months then annually in each patient. During follow-up, treatment was proposed in case of evolving meningioma: symptoms, increasing volume tumor and/or appearance of peritumoral brain edema. When high grade meningioma was diagnosed, adjuvant radiation therapy was discussed according to EANO recommendations. As potential tumor potential regression was reported in patients with progestin related meningiomas, no systematic adjuvant radiotherapy was performed in our series.

Clinical and radiological follow-up data collection

Among clinical data, sex, age at diagnosis, medical history and clinical presentation were considered in each patient. Type of hormonotherapy, duration of exposure and reason for prescription were recorded. Concomitant estrogen regimen use was also registered. First MRI at diagnosis and MRI at last follow-up were compared to evaluate tumor evolution (stabilization, progression, regression and recurrence). Follow-up duration was calculated using the delay between these two exams. Number and location of each meningioma (skull base, convexity, median and other) were observed. Peritumoral brain edema existence, absence of cleft sign and volumetric meningioma evolution were documented. Type of meningioma treatment (surgery, gamma-knife radiosurgery, radiation therapy) was considered. Simpson grade were assessed on the basis of operative reports and post-operative MRI. In our clinical practice, gamma-knife radiosurgery (GKS) and conventional radiation therapy were reserved to inoperable cases or to adjuvant therapy for high grade meningiomas. Pathological diagnosis (according to 2016 WHO classification), hormonal receptors expression and biomolecular studies were performed in each operated patient.

PFSR was assessed on the interval between immediate post-operative MRI and last available MRI during follow-up, and presented with standard Kaplan-Meier curve. We compared our results to previously published series in which high grade sporadic and radio-induced meningiomas PFSR are documented.

In this series, 9 patients underwent surgery for a progestin related high grade meningioma. The indication for hormonal treatment is summarized in Table 1. The prescribing physician was a gynecologist in 7 patients and a dermatologist in 2 patients. All patients used a continuous progestative treatment without counterbalancing estrogen therapy. Clinical findings are presented in Table 2, and radiological findings in Tables 3 and 4. Surgical resection (Simpson grade I-II) of the tumor was complete in all cases but one who underwent further radiation therapy. Another patient had gamma knife radiosurgery to control a second location of meningioma. No patient died, and postoperative course was uneventful in all patients without neurological worsening. Immunohistological and biomolecular results are summarized in Table 5. With a mean follow up of 7.1 years, none of the 9 patients showed clinical or radiological signs of tumor recurrence.

Grade II progestin related meningiomas show less tumor recurrence rate after surgery than patients with sporadic high grade meningomas, especially after progestin withdrawal. After complete surgical resection of grade II progestin related meningioma, adjuvant radiation therapy might be reserved for radiologically proven recurrence cases.

High grade meningioma identification

Based on recent publications[1-14, 19-27, 36, 37], surgical treatment of meningiomas should be proposed with caution in case of CA exposure because of potential meningioma regression after progestin withdrawal. For patients with NA[8, 13, 24-26] and ChlA[13, 15, 25, 27] exposure, the potential tumor regression appears less significant in the literature. The potential impact of NA and ChlA on meningioma growth is probably different from CA on a biomolecular point of view. Despite these data, high grade meningioma occurred in the 3 progestin groups. In our opinion, when peritumoral brain edema is present or appears on MRI and when the cleft sign is absent, diagnosis of high grade meningiomas should be suspected even in asymptomatic patient. Moreover, in their recent study JB Pond and al. [35]suggested significant elevations in ADC and NADC values for grade II chordoid meningiomas when compared with all other WHO meningiomas subtypes. This feature may also provide reliable presurgical prediction of the histological diagnosis. Thus, when these radiologic signs are present delayed surgery is less recommended and should be performed as soon as possible in progestin related meningiomas.

PFSR after surgical resection

After surgical resection, no tumor recurrence was noted in patients with high grade hormonal induced meningiomas. This is unsual compared to patients with high grade sporadic meningioma who harbored a 50% PFSR at 5 years (Figure 1.) In our limited series even in case of Simpson 4 extension grade resection (Patient 9), no tumor progression was noted at last follow-up. Similarly, no tumor progression was noted in the five patients with Simpson 2 extended grade resection. None of these patients underwent adjuvant radiotherapy. Based on this result and on the fact that the optimal timing use of radiation therapy remains discussed for sporadic meningiomas (i.e. ROAM-EORTC 1308[34]), radiation therapy could only be performed in case of proved tumor progression after surgical resection in patient with progestin related high grade meningiomas. Our treatment strategy is different for sporadic high grade meningiomas for which adjuvant radiation therapy is preferred, especially in case of incomplete surgical resection. The indication of radiation therapy can be debatable in Patient 3 who had a Simpson 3 extended grade resection. Gamma knife radiosurgery remained a safe and effective treatment other than surgery in patients who developed tumor progression of a second meningioma location. Tumor regression was noted in all GKS treated patients. Even if no study has identified an obvious common downstream target for determining the intracellular signaling pathways implicated in progestin induced meningiomas, antiprogesterone treatments could be interesting to propose as an alternative in case of recurrence when new surgery is refused by the patient or not applicable before proposing radiotherapy [25].

MRI volumetric follow-up

Semestrial volumetric long-term MRI follow-up is mandatory to assess tumor evolution in multiple meningiomas cases. In case of NA and ChlA exposure, other meningioma location progression was usually noted in our series despite the progestin withdrawal recommendation. On the contrary, as already demonstrated in CA exposure, regression and stabilization of the other meningioma locations appears more frequently after progestin withdrawal. The appearance of “de novo” meningioma and progression of preexisting meningiomas (Patient 5), may lead to confound a patient who is not following the withdrawal recommendation (defined as a pseudo-progression in Table 4). Indeed, some patients remain very attached to their hormonal treatment i.e. for cosmetic reasons.

Hormonal receptor expression

One argument in the meningioma development hormonal theory is sustained by the hormonal receptors expression. It is generally admitted that most meningiomas express progesterone receptors (PR) but they rarely express estrogen receptors (ER)[17, 38-41]. Low or negative PR expression and positive ER expression are more frequently seen in high grade meningiomas[17, 38-41]. In our series, all patients demonstrated hormonal receptors expression which is consistent with a progestin related meningioma theory. In our series, the high grade meningioma rate in patients with progestin related meningiomas appears higher than in patients with sporadic meningiomas. Moreover, on the contrary of patients with high grade sporadic meningiomas, grade II chordoïd meningiomas (n=6) were more frequent than atypical meningiomas (n=3). All patients with grade II chordoïd meningioma subtype harbored a maximal rate of PR expression (100%) and only two of these patients had moderate ER expression. The 3 remaining patients with grade II atypical meningioma subtype had only a lower PR expression. Even if our results based on hormonal receptors expression should be interpreted with caution due to sample size, it is consistent with the more indolent course of high grade progestin induced meningiomas. It may partially explain that in our series no recurrence was observed in the 9 cases of high grade meningioma after the mean follow-up of 7.1 years. This difference highlights the need of systematic receptor expression study in all cases of sporadic meningioma and progestin related meningiomas.

Biomolecular profile

No concomitant estrogen regimen was performed in all patients despite actual recommendation for CA use, and concomitant estrogen regimen is not mandatory in NA and ChlA prescription. This unbalanced hormone regimen is a controversial factor of hormonal tumor development but an intriguing factor in progestin related meningioma development. In his series of 40 patients operated of meningioma and exposed to a long term progestative therapy, Peyre and al.[15] demonstrated a shift in mutational landscape indicating the vulnerability of certain meningeal cells and mutations to hormone-induced tumorigenesis. While the relationship between PIK3CA mutation frequency and hormone-related cancers (such as breast and endometrial cancers) is well-known, this hormonally induced mutational shift is a unique feature in molecular biology of progestin related meningiomas compared to sporadic meningiomas. In our series, this PIK3CA mutation was only found in 2 grade II atypical meningiomas which was consistent with Peyre and al. study who reported a lower PIK3CA mutants rate in case of high grade meningiomas. Some authors[15, 42, 43] also suggest that PIK3 activation is insufficient alone to conduct to malignant meningioma transformation highligting the unknown field of progestin on meningioma tumorigenesis while reinforcing the implication of progestin in these particular cases. In line with recent reports[42, 44], when PIK3CA or AKT1 mutant were identified in skull base meningioma locations in our series, no recurrence occurred during the follow-up period. NF2 mutation was found in one female patient without higher aggressivity or recurrence, comforting the mutation alone is not sufficient for malignant transformation. The other mutations interpretation is more delicate as no global consensus exists. On another point of view, the biomolecular result is consistent with the operated location[45] and probably explained by embryological reasons as suggested by some authors[40, 44, 46, 47]. DNA methylation and karyotype studies might help to better understanding of meningioma tumorigenesis[29, 48-50].

Limitations of our study

The results of this series should be interpreted with caution due to the limited sample size. Further studies with more patients are required to confirm our findings. Conducting systematic biomolecular studies including methylation studies on larger cohorts and comparing it to sporadic meninongiomas could be useful to better understand intracranial meningiomas development and the mechanism of high grade transformation. Such studies may precise the impact of progestatives in the history of meningioma development and progression. This study highlights the need of a multidisciplinary prospective approach in systematic screening, and the necessity of a national or European register, especially in case of progestin induced meningiomas.

To our knowledge, this is the first study reporting the long-term outcome of patients with grade II progestin related meningiomas. These patients show less tumor recurrence after surgery than patients with sporadic high grade meningomas, especially when they accept the progestin withdrawal recommendation. No recurrence was noted in the 9 patients after a mean follow-up of 7.1 years. In our series, grade II chordoïd meningiomas are more frequent than atypical meningiomas but all patients presented with high progesterone receptors expression which is consistent with hormonal exposure. The presence or appearance of peri-meningioma edema and the absence of cleft sign before volumetric change should suggest the existence of an underlying high grade meningioma. In these cases, surgical resection could be immediately considered and adjuvant radiation therapy could be reserved for proven recurrence cases despite recommendations for high grade sporadic meningioma management.

Funding none

Conflicts of interest/Competing interests none

Ethics approval Ethical approval was waived by the local Ethics Committee of Lille University in view of the retrospective nature of the study and all the procedures being performed were part of the routine care

Consent to participate Informed consent was obtained from all individual participants included in the study

Consent for publication The authors affirm that human research participants provided informed consent for publication of the images in Figure1

Availability of data and material The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request

Code availability not applicable

Authors' contributions All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Antoine Devalckeneer, Rabih Aboukais and Jean-Paul Lejeune. The first draft of the manuscript was written by Antoine Devalckeneer and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Table 1. Prescriptions data

Patients	Progestative	Daily dose	Regimen	Exposition (Y)	Estrogen	Indication
1	CA	50 mg 2x/d	Continous	16	No	Hirsustim
2	CA	50 mg 1x/d	Continous	3	No	Acnea
3	CA	50 mg 1x/d	Continous	15	No	Acnea
4	CA	50 mg 2x/d	Continous	20	No	Hirsutim
5	CA	50 mg 2x/d	Continous	19	No	Hirsutism
6	NA	5 mg 1x/d	Continous	7	No	Uterine fibromas
7	NA	5 mg 1x/d	Continous	10	No	Uterine fibromas
8	CA	50 mg 2x/d	Continous	10	No	Hirsutism
9	ChlA	10 mg 1x/d	Continous	3	No	Estrus cycle trouble

CA = Cyproterone Acetate

NA = Normegestrol Acetate

ChlA = Chlormadinone Acetate

Y = years

Table 2. Clinical data

Patients	Sex	Age at diagnosis (years)	F/U (years)	Clinical presentation	Treatment indication conducting to surgery	Simpson grade	Adjuvant Radiotherapy	Further GKS treatment
1	F	50	12	Headache	Focal deficit / Edema apparition at 3 years f/u	2	No	No
2	F	19	6	Visual impairement	Focal deficit/ Edema at diagnosis	1	No	No
3	F	47	6	Seizure	Seizure/Edema at diagnosis	3	Yes	No
4	F	63	9	Seizure	Seizure/Edema at diagnosis	2	No	Yes
5	F	38	13	Comportemental change	Edema apparition at 6 months f/u	2	No	Yes
6	F	54	6	Focal deficit	Focal deficit/ Edema at diagnosis	1	No	No
7	F	64	4	Headache	Edema at diagnosis	2	No	No
8	F	28	4	Headache	Edema at diagnosis	2	No	No
9	F	45	4	Headache	Edema at diagnosis	4	No	No

F = Female
F/U = follow-up
GKS = Gamma-knife surgery

Table 3. Radiological data of operated meningioma

Patient	Nb meningiomas	Skull base	Median	Convexity	Operated meningioma location	Operated meningioma volume (cm³)	Cleft sign	Peritumoral brain edema	ADC Aspect	Simpson grade	Reccurence	F/U (years)
1	3	2	1	0	Rolandic parasagittal	43,5	absent	present	Augmented	2	0	12
2	1	0	0	1	Parietal convexity	49,7	absent	present	Not specific	1	0	6
3	1	0	0	1	Temporal convexity	23,9	absent	present	Augmented	1	0	6
4	3	3	0	0	Sphenoïdal extern	38,2	absent	present	Augmented	2	0	9
5	6	4	0	2	Sphenoïdal jugum	60	absent	present	Not specific	2	0	13
6	9	5	0	4	Frontal convexity	61,8	absent	present	Augmented	1	0	6
7	5	4	1	0	Sphenoïdal extern	104,1	absent	present	Augmented	2	0	4
8	1	1	0	0	Sphenoïdal extern	107,9	absent	present	Augmented	2	0	4
9	2	2	0	0	Olfactive	27,9	absent	present	Not specific	4	0	4

ADC = Apparent Diffusion Coefficient

Table 4. Radiological evolution of non-operated meningiomas and residual meningioma

Patients

Location

Initial MRI

Volume (cm³)

Edema

Last MRI

Volume (cm³)

Edema

Qualitative

interpretation

F/U (years)

Progestative

Skull Base
Skull Base

0.419

Stabilization

Cyproterone

Acetate

Skull Base

0.523

Stabilization

Cyproterone

Acetate

Skull Base¹

Skull Base

Skull Base²

Convexity

1.564

0.158

Not existent

0.555

0.525

1.112

0.278

0.245

Pseudo-regression

Pseudo-progression

Cyproterone

Acetate

Skull Base

Skull Base³

Skull Base⁴

Skull Base

Convexity

2.89

1.729

0.706

1.036

0.517

0.216

0.186

2.816

0.433

1.169

0.72

0.493

0.201

0.092

Regression

Progression

Pseudo-regression

Regression

Nomegestrol

Acetate

Skull Base

Median

1.316

8.15

1.545

1.562

8.601

1.309

Progression

Regression

Nomegestrol

Acetate

Residue

Skull base

0.993

0.064

0.993

0.085

Stabilization

Progression

Chlormadinone

Acetate

¹ Gamma-Knife Surgery (GKS) in 2011
²GKS in 2017
³GKS in 2020
⁴ GKS in 2016

Table 5. Histopathological and biomolecular data

Patients	2016 WHO classification	Ki67	ER	PR	AR	Biomolecular profile	Operated locations
1	Grade II choroïd	NS	negative	100%	negative	RICTOR/FANCA	Rolandic parasagittal
2	Grade II atypical	10%	negative	5%	negative	NF2	Parietal convexity
3	Grade II choroïd	NS	15%	100%	negative	AKT1	Temporal convexity
4	Grade II choroïd	NS	negative	100%	negative	SLX4	Sphenoïdal extern
5	Grade II atypical	NS	negative	85%	negative	PIK3CA	Sphenoïdal jugum
6	Grade II choroïd	4%	60%	85%	negative	0	Frontal convexity
7	Grade II choroïd	NS	negative	100%	negative	CREBBP	Sphenoïdal extern
8	Grade II choroïd	5%	negative	100%	negative	0	Sphenoïdal extern
9	Grade II atypical	2%	negative	71%	negative	PIK3CA/PPARG	Olfactive

ER = estrogen receptors
PR = progesterone receptors
AR = androgen receptors
NS = not specified on anatomo-pathology report

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Have Progestin Related and Sporadic High Grade Meningiomas the Same Natural History?

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