International journal of gynecological cancer : official journal of the International Gynecological Cancer Society · 2020
Human epidermal growth factor receptor-2 (HER2) is a potential therapeutic target in extramammary Paget's disease of the vulva.
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Bartoletti Michele, Mazzeo Roberta, De Scordilli Marco, Del Fabro Anna, Vitale Maria Grazia, Bortot Lucia, Nicoloso Milena Sabrina, Corsetti Serena, Bonotto Marta, Scalone Simona, Giorda Giorgio, Sorio Roberto, Andreetta Claudia, Meacci Maria Luisa, De Vivo Rocco, Fasola Gianpiero, Sopracordevole Francesco, Puglisi Fabio
Аннотация
BACKGROUND: Invasive vulvar Paget's disease with over-expression of the human epidermal growth factor receptor 2 (HER2) protein is potentially suitable for targeted therapy, especially in a metastatic setting where no effective treatments are available.
METHODS: Four consecutive patients with HER2 positive advanced vulvar Paget's disease, treated with weekly trastuzumab (loading dose 4 mg/kg, then 2 mg/kg) and paclitaxel (80 mg/m2) followed by 3-weekly trastuzumab maintenance (6 mg/kg), are reported.
RESULTS: Median age and follow-up of patients were 62.5 years (45-74) and 16 months (6-54), respectively. Complete or partial responses were observed in all patients. Median time to response was 3 months (range 2-4), while median duration of response was 10 months (range 2-34). Case 1 presented with pulmonary and lymph nodes involvement. She experienced a radiological complete response after 24 treatment administrations, and a progression-free survival of 36 months. At disease progression, treatment re-challenge achieved partial response. She is currently receiving treatment with trastuzumab-emtansine. Case 2 was a 74-year-old woman who developed pulmonary metastasis after first-line cisplatin treatment. She had a partial response and a progression-free survival of 10 months. Case 3 had inguinal and para-aortic lymphadenopathy in complete response after 18 treatment administrations. She developed brain metastasis while receiving trastuzumab maintenance. Case 4 was treated for locally advanced disease and experienced a subjective benefit with relief in perineal pain and itching. No unexpected treatment-related side effects were reported.
CONCLUSIONS: Advanced vulvar Paget's disease is a rare disorder and no standard treatment is available. In the sub-group of HER2 positive disease, weekly paclitaxel-trastuzumab appears to be active and safe, and may be considered a therapeutic option in these patients.
METHODS: Four consecutive patients with HER2 positive advanced vulvar Paget's disease, treated with weekly trastuzumab (loading dose 4 mg/kg, then 2 mg/kg) and paclitaxel (80 mg/m2) followed by 3-weekly trastuzumab maintenance (6 mg/kg), are reported.
RESULTS: Median age and follow-up of patients were 62.5 years (45-74) and 16 months (6-54), respectively. Complete or partial responses were observed in all patients. Median time to response was 3 months (range 2-4), while median duration of response was 10 months (range 2-34). Case 1 presented with pulmonary and lymph nodes involvement. She experienced a radiological complete response after 24 treatment administrations, and a progression-free survival of 36 months. At disease progression, treatment re-challenge achieved partial response. She is currently receiving treatment with trastuzumab-emtansine. Case 2 was a 74-year-old woman who developed pulmonary metastasis after first-line cisplatin treatment. She had a partial response and a progression-free survival of 10 months. Case 3 had inguinal and para-aortic lymphadenopathy in complete response after 18 treatment administrations. She developed brain metastasis while receiving trastuzumab maintenance. Case 4 was treated for locally advanced disease and experienced a subjective benefit with relief in perineal pain and itching. No unexpected treatment-related side effects were reported.
CONCLUSIONS: Advanced vulvar Paget's disease is a rare disorder and no standard treatment is available. In the sub-group of HER2 positive disease, weekly paclitaxel-trastuzumab appears to be active and safe, and may be considered a therapeutic option in these patients.