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Overwhelming response to Dabrafenib in a patient with double BRAF mutation (V600E; V600M) metastatic malignant melanoma.

Ponti G, Tomasi A, Pellacani G - J Hematol Oncol (2012)

Bottom Line: Mutational study of the tumor revealed a double BRAF mutation on V-600E and V600M.Almost surprisingly for the rapidity of the effect, one week later the lesion on the shoulder has reduced its size by 60% and one month later it has completely disappeared from sight.CT scan of June 2012 documented the astonishing clinical response.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Clinical and Diagnostic Medicine and Public Health, University Hospital of Modena and Reggio Emilia, via del Pozzo 7, 41100, Modena, Italy. giovanni.ponti@unimore.it

ABSTRACT
The recent findings brought the necessity of testing the mutational status of a series of genes which had been already identified as responsible for melanomas development and progression, such as BRAF, CKIT and PTEN: the consequent results are, in fact, essential to guide the assessment of the novel treatment protocols based on tailored targeted therapies. We present here the case of a 66 year-old male patient, diagnosed with an advanced melanoma in June 2011, and treated with Dabrafenib for double mutant metastatic disease. The patient was referred to our attention for a large exophytic malignant melanoma on the left shoulder. After complete surgical excision and elective lymph node dissection for presence of metastatic sentinel lymph node, the patient has started high-dose interferon alfa-2b injections as adjuvant therapy for a complete negative staging. The treatment was interrupted in August 2011 due to the appearance of metastatic lymph nodes. Tumor burden was rapidly growing reaching in few months the size of a tennis ball for the tumor mass located in the shoulder. Mutational study of the tumor revealed a double BRAF mutation on V-600E and V600M. This finding incited us to enroll the patient in compassionate Dabrafenib clinical trial. The therapy was started on may 2012 at 150 mg bid dosage. Almost surprisingly for the rapidity of the effect, one week later the lesion on the shoulder has reduced its size by 60% and one month later it has completely disappeared from sight. CT scan of June 2012 documented the astonishing clinical response.

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Advanced cutaneous malignant melanoma. Large exophytic skin melanoma on the left shoulder (Panel a); Left axillary and brachial metastatic masses (Panel b); reduction of the shoulder metastatic lesions by 60% after 1 week of Dabrafenib therapy (Panel c); Melanoma metastatic lesions completely disappeared after less than 1 month of therapy (Panel d)
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Figure 1: Advanced cutaneous malignant melanoma. Large exophytic skin melanoma on the left shoulder (Panel a); Left axillary and brachial metastatic masses (Panel b); reduction of the shoulder metastatic lesions by 60% after 1 week of Dabrafenib therapy (Panel c); Melanoma metastatic lesions completely disappeared after less than 1 month of therapy (Panel d)

Mentions: The patient was referred to our attention for a 5 cm large exophytic skin lesion on the left shoulder, that revealed to be a malignant melanoma (Figure 1a). After complete surgical excision and elective lymph node dissection for presence of metastatic sentinel lymph node, the patient has started high-dose interferon alfa-2b injections (Intron) as adjuvant therapy for a complete negative staging. The treatment was interrupted in August 2011 due to the appearance of left axillary and brachial nodular masses, that appeared as metastatic lymph nodes at CT scan in February 2012. Tumor burden was rapidly growing reaching in few months the size of a tennis ball for the tumor mass located in the shoulder that determined the uncomfortable “hump” on the patient’s back vz(Figure 1b).


Overwhelming response to Dabrafenib in a patient with double BRAF mutation (V600E; V600M) metastatic malignant melanoma.

Ponti G, Tomasi A, Pellacani G - J Hematol Oncol (2012)

Advanced cutaneous malignant melanoma. Large exophytic skin melanoma on the left shoulder (Panel a); Left axillary and brachial metastatic masses (Panel b); reduction of the shoulder metastatic lesions by 60% after 1 week of Dabrafenib therapy (Panel c); Melanoma metastatic lesions completely disappeared after less than 1 month of therapy (Panel d)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3473234&req=5

Figure 1: Advanced cutaneous malignant melanoma. Large exophytic skin melanoma on the left shoulder (Panel a); Left axillary and brachial metastatic masses (Panel b); reduction of the shoulder metastatic lesions by 60% after 1 week of Dabrafenib therapy (Panel c); Melanoma metastatic lesions completely disappeared after less than 1 month of therapy (Panel d)
Mentions: The patient was referred to our attention for a 5 cm large exophytic skin lesion on the left shoulder, that revealed to be a malignant melanoma (Figure 1a). After complete surgical excision and elective lymph node dissection for presence of metastatic sentinel lymph node, the patient has started high-dose interferon alfa-2b injections (Intron) as adjuvant therapy for a complete negative staging. The treatment was interrupted in August 2011 due to the appearance of left axillary and brachial nodular masses, that appeared as metastatic lymph nodes at CT scan in February 2012. Tumor burden was rapidly growing reaching in few months the size of a tennis ball for the tumor mass located in the shoulder that determined the uncomfortable “hump” on the patient’s back vz(Figure 1b).

Bottom Line: Mutational study of the tumor revealed a double BRAF mutation on V-600E and V600M.Almost surprisingly for the rapidity of the effect, one week later the lesion on the shoulder has reduced its size by 60% and one month later it has completely disappeared from sight.CT scan of June 2012 documented the astonishing clinical response.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Clinical and Diagnostic Medicine and Public Health, University Hospital of Modena and Reggio Emilia, via del Pozzo 7, 41100, Modena, Italy. giovanni.ponti@unimore.it

ABSTRACT
The recent findings brought the necessity of testing the mutational status of a series of genes which had been already identified as responsible for melanomas development and progression, such as BRAF, CKIT and PTEN: the consequent results are, in fact, essential to guide the assessment of the novel treatment protocols based on tailored targeted therapies. We present here the case of a 66 year-old male patient, diagnosed with an advanced melanoma in June 2011, and treated with Dabrafenib for double mutant metastatic disease. The patient was referred to our attention for a large exophytic malignant melanoma on the left shoulder. After complete surgical excision and elective lymph node dissection for presence of metastatic sentinel lymph node, the patient has started high-dose interferon alfa-2b injections as adjuvant therapy for a complete negative staging. The treatment was interrupted in August 2011 due to the appearance of metastatic lymph nodes. Tumor burden was rapidly growing reaching in few months the size of a tennis ball for the tumor mass located in the shoulder. Mutational study of the tumor revealed a double BRAF mutation on V-600E and V600M. This finding incited us to enroll the patient in compassionate Dabrafenib clinical trial. The therapy was started on may 2012 at 150 mg bid dosage. Almost surprisingly for the rapidity of the effect, one week later the lesion on the shoulder has reduced its size by 60% and one month later it has completely disappeared from sight. CT scan of June 2012 documented the astonishing clinical response.

Show MeSH
Related in: MedlinePlus