Leiomyosarcomas are one of the most common types of sarcomas, with an estimated incidence between 10 and 20% of all sarcomas. Unfortunately, despite optimal locoregional treatments, leiomyosarcoma may relapse. At the European level through EORTC, efforts were made to assess different regimens in combination with doxorubicin for the treatment of metastatic unresectable leiomyosarcoma. A total of 71 patients treated between 2010-2023 were retrospectively selected, all of whom had provided consent for the use of their data. To obtain a more homogeneous sample, only those patients treated in the first line with anthracyclines in monotherapy or in combination, and gemcitabine and docetaxel were selected from the initially identified group. A total of 71 patients were retrospectively reviewed, comprising 62 women and 9 men. Age at diagnosis was 53 years (range: 26-86 years). The most common location uterine in 46%. 52,11% (37 patients) exhibited metastatic onset. 64% had pulmonary involvement, predominantly followed by peritoneal localization. Survival in patients with non-metastatic onset, was 58 months (range: 51-64 months), compared to 24 months for metastatic onset (range: 13-34 months), p-value of 0.003. PFSl in different treatment lines: Doxorubicin (D): 8 months, Doxorubicin + dacarbazine(D+DTIC): 12 months, Doxorubicin+trabectedin(D+tra): 9 months, Epirubicin + ifosfamide (Epi+Ifo): 7 month, gemcitabine + docetaxel (Gem+Doc): 7 months and Doxorubicin + olaratumab (D+olara): 7 months, p=0,07. Overall survival (OS) D: 47 months, D+DTIC: 74 months, D+tra 42 month, Epi+Ifo: 30 months, Gem+Doc: 37 months and D+olara: 34 months. Limitation of retrospective assessment. Slight increase in progression-free survival comparing with the literature. Epi+Ifo should not be a standard option in leiomyosarcoma, as literature data show a low response and limited disease control. However, in our historical series, it was a chosen line in 7 patients. OS, the combination of D+DTIC stands out, doubling overall survival compared to historical data. 86% reach second lines. Assessing PFS2 in treatment, a notable survival of 9 months with tra stands out, surpassing the average and comparing with the trabectedin second-line study showing a PFS of 4.2 months.
Approximately 20% of patients at diagnosis, and about 30–40% of patients with an initial diagnosis of localized sarcoma will develop distant metastasis and will eventually succumb to the disease. Available therapeutic lines for soft tissue sarcomas are diverse, each offering a set of specific characteristics. Beyond first-line, disease control is modest, with median progression-free survival (PFS) ranging 2.6–4.6 months. In this case, the value of trabectedin has been emphasized beyond the first line in the treatment of metastatic soft tissue sarcomas. Trabectedin is a marine-derived alkaloid, approved for the treatment of advanced STS after anthracyclines and ifosfamide. Retrospective review of the medical records of patients who have received trabectedin in the last 5 years. A descriptive analysis has been conducted on the age at presentation, histological subtype, initial onset, and the chemotherapy line in which trabectedin was administered. In a subsequent step, the PFS and overall survival (OS) of the treated patients were analyzed. Additionally, a specific analysis was conducted on the subgroup that received a combination with radiotherapy. We included 207 patients (p). 116p women (56%). The median age 56 years. The most common metastatic site are lungs (68,6%). The most common subtypes were leiomyosarcoma (Lei) 38,2%, liposarcoma (L) 21,3%, Undifferentiated Pleomorphic Sarcoma (UPS) 10,1%, sinovial sarcoma (SiS) 6,8% and stromal sarcomas (StS) 4,3%. 73 p get treatment at second line, and 75 p get trabectedin in third line. PFS in all p is around 6 months influenced due to time p get treatment. PFS in p treated at 2° line 14 month, 6 month as 3° line, and lower in subsequences lines. p = 0,001. The different is also observed in OS. The different subtypes presented with different PFS, 10 month in ESF, 9 month in L, 8 month in Lei, 8 months in StS and 3 moths in UPS. All patients treated showed benefit with PFS 6 month, higher than literature review. However, there are significance different with a higher PFS in patient with lower number of previous lines. There are some histotype with higher benefit L, leiomyosarcoma an synovial sarcoma. Trabectedin is a useful second line, with benefit in all subtypes, showing a high disease control over 4 month.