Surgical treatment of melanoma in pregnancy: a practical guideline

Evaluation of the reporting quality of clinical practice guidelines on melanoma using the RIGHT checklist

Background

The International Reporting Items for Practice Guidelines in Healthcare (RIGHT) instrument was launched in 2016 to improve the reporting of clinical practice guidelines (CPGs). We aimed to systematically evaluate the reporting quality of CPGs on melanoma using RIGHT.

Methods

We systematically searched electronic databases, guideline databases and medical society websites until November 2020 to identify guidelines for melanoma published since 2018. The reporting quality of included guidelines was assessed by calculating the percentages of the 35 items of the RIGHT checklist that were appropriately reported. We stratified the results by selected characteristics to describe the correlation of these factors with reporting quality.

Results

A total of 20 guidelines were identified and analyzed. The mean reporting rate was greater than 50% in five of the seven domains of the RIGHT checklist; the remaining two domains (Other information, Review and quality assurance) both had a mean reporting rate of 35.0%. The mean overall reporting rate was 63.7%. No CPG considered equity, feasibility or acceptability of the recommendations (item 14c), and only one CPG described the role of funders (item 18b). Guidelines that reported funding or were published in higher-impact journals tended to have a higher reporting quality, whereas the reporting rate in the one included Chinese-language CPG was low.

Conclusions

Reporting quality of melanoma CPGs tends to be relatively good. The CPGs developed in China were however an exception. The use of the 2016 RIGHT tool in guideline development should be encouraged to support rigorous and transparent reporting.

Multidisciplinary consensus on cancer management during pregnancy

Cancer during pregnancy is a challenge for multi- and interdisciplinary collaboration due to the diagnostic, prognostic and therapeutic implications, the need for an integrated harmonization of medical action for the pregnant patient and the embryo or foetus and the characteristics of each gestational period, which will determine the protocol to be proposed and its limitations. For this reason, a group of experts appointed by participating scientific societies, which includes the Spanish Society of Medical Oncology (Sociedad Española de Oncología Médica—SEOM), the Spanish Association of Surgeons (Asociación Española de Cirujanos—AEC), the Spanish Society of Gynaecology and Obstetrics (Sociedad Española de Ginecología y Obstetricia—SEGO), the Spanish Society of Nuclear Medicine and Molecular Imaging (Sociedad Española de Medicina Nuclear e Imagen Molecular—SEMNIM), the Spanish Society of Oncological Radiotherapy (Sociedad Española de Oncología Radioterápica—SEOR) and the Spanish Society of Medical Radiology (Sociedad Española de Radiología Médica—SERAM), have worked together to establish consensus recommendations that allow the harmonization of management and ultimately the optimization of the healthcare of pregnant patients with cancer. When cancer is detected in a pregnant woman, the week of gestation in which the diagnosis is made must be considered, as well as the characteristics of the tumour. It is strongly recommended that a multidisciplinary team assesses the situation and guides the patient and her family during the informing, diagnosis and treatment process. Likewise, the foetus should be monitored and managed by specialized obstetricians who are part of a multidisciplinary cancer committee.

Prognosis and Management of BRAF V600E-Mutated Pregnancy-Associated Melanoma

BACKGROUND

Approximately one third of women who develop melanoma at childbearing age are diagnosed during gestation or the postpartum period, facing pregnancy-associated melanoma (PAM). However, only some retrospective studies with heterogeneous data have analyzed the impact of pregnancy on melanoma development, and no evidence exists about the behavior and the management of BRAF-mutated disease.

SUBJECTS, MATERIALS, AND METHODS

In order to better describe the evolution of BRAF V600E-mutated PAM, we present here all consecutive cases diagnosed in our site during the last 7 years, recording oncological, obstetrical, and perinatal parameters, as well as the therapeutic decisions for both melanoma and gestation. Based on our institutional experience, we weigh the current published evidence and discuss upcoming clinical considerations about the prognosis of PAM, the role of BRAF status, and the possible treatment options during pregnancy in localized or advanced/metastatic disease. Five women were diagnosed with newly metastatic or relapsed BRAF V600E-mutated PAM (four during gestation and one in the 1st year postpartum) between 2012 and 2019. All of them developed extensive metastatic disease with multiple organ involvement, and four developed brain metastases. All cases experienced melanoma progression in less than 6 months under targeted therapy and died soon independently of the followed sequence of treatments. All the neonates were delivered alive and healthy, but one developed melanoma earlier than the second year of life.

RESULTS

Reviewing the literature to confirm our unfavorable outcomes, no specific data on BRAF-mutated PAM were retrieved and current evidence still supports that the prognosis of PAM should be guided by the established risk factors, whereas the management of advanced/metastatic PAM should be evaluated on a case-by-case basis.

CONCLUSION

More data are required to ascertain whether BRAF-mutated profile adversely affects PAM outcome, although the clinicians should be aware to detect any potential melanoma lesion during pregnancy as soon as possible, treating it locally, regardless of its BRAF status.

IMPLICATIONS FOR PRACTICE

The prognosis and management of pregnancy-associated melanoma whether BRAF-mutated or wild type, is currently guided by the same parameters as in the nonpregnant condition. In this special nontrial subpopulation, BRAF-mutated status seems to have a detrimental effect on disease outcome, independently of the following treatments. In early stage melanoma, wide local excision with or without sentinel lymph node dissection may be curative at any trimester of gestation, while in advanced/metastatic setting, therapeutic strategy including immune-checkpoint or BRAF/MEK inhibitors, is more challenging, regardless of BRAF status, and should be based on an individualized decision in each case at a multidisciplinary level.

[Treatment of melanoma during pregnancy]

Melanoma diagnosed during pregnancy is a rare clinical case presentation which must be mastered. In the absence of guidelines for this clinical challenge, we performed a review of the literature and provide a practical guideline on how to manage such rare clinical cases based on our clinical experience. Expecting mothers require adequate counselling and explanation of all therapeutic options as they take responsibility for more than their own lives. However, they should be guided through the process of diagnostic and therapeutic measures in a potentially life-threatening situation. Pregnancy itself is no reason to withhold any type of necessary melanoma surgery. Perioperative management, however, requires certain adjustments in order to comply with this special situation. If indicated, even adjuvant and palliative systemic therapy need to be given to the patient, but they also have to be adapted to the specific circumstances as data is still sparse, especially for the new first and second line therapies with antibodies and targeted molecules.