Polidocanol foam sclerotherapy in the treatment of hemorrhoidal disease in patients with bleeding disorders: a multicenter, prospective, cohort study.

BACKGROUND: The management of hemorrhoidal disease (HD) in patients with bleeding disorders (BD) is challenging. Polidocanol foam sclerotherapy (PFS) is associated with a low rate of bleeding complications. The aim of this study was to compare the efficacy and safety of PFS in the treatment of HD in patients with and without BD.
METHODS: This prospective, multicenter, cohort study enrolled patients with (group B) and without (group A) BD, with symptomatic internal HD grades I-III over an 18-month period. All patients were treated with PFS. Patients with congenital BD did not undergo prior replacement therapy and those with acquired BD due to antithrombotic drugs, did not discontinue therapy. Efficacy outcomes included therapeutic success and HD recurrence during a 1-year follow-up period. To evaluate safety the complications related to PFS were recorded.
RESULTS: We included 228 patients (group A: 155, group B: 73; male/female: 114/114; mean age: 59.4 ± 15.9 years). The baseline hemorrhoidal disease bleeding grade (p < 0.001) and Sodergren hemorrhoidal symptom severity score (p = 0.019) were higher for group B. The overall therapeutic success rate was 93.4% with an average number of sessions of 1.51 ± 0.74, significantly higher for group B (1.68 ± 0.86 vs 1.43 ± 0.65, p = 0.013). Complications occurred in 11.4% of the patients, with bleeding reported in 4.8%. The majority of complications were mild (96.2%). No significant differences between the two groups were observed for therapeutic success, recurrence, or complication rate.
CONCLUSIONS: Patients with BD may have more symptomatic HD at baseline. Even so, PSF showed similar effectiveness and safety in patients with BD compared to patients without BD.

Introduction

Hemorrhoidal disease (HD) is one of the most common proctologic diseases [1-5]. The management of HD should be guided by patients’ preference, comorbidities, disease grade, and treatment efficacy and safety [1, 6–14].

For symptomatic internal HD grades I to III refractory to conservative management, an office-based procedure should be offered as first line treatment [1, 7, 15–17]. Rubber band ligation (RBL) has been recommended as the gold standard treatment due to higher efficacy and lower recurrence rate [1, 11, 15, 18, 19]. However, high post-procedural bleeding rates (ranging from 3.5% to-50%), including late bleeding, have been reported [1, 15, 18, 20]. Sclerotherapy is associated with lower bleeding rates but is more recurrence-prone [1, 15, 21–24]. The innovative use of polidocanol as a foam has drawn attention in recent years because of its improved sclerosing capacity, superior efficacy, the need for fewer office-based sessions and less complications, including bleeding and pain [15, 21–23, 25, 26]. Polidocanol foam sclerotherapy (PFS) induces a local inflammatory reaction that leads to local sclerosis of submucosal tissue, and promotes fixation of the hemorrhoidal tissue and obliteration of the vascular bed with tissue fibrosis [27, 28]. This technique has been shown to be reproducible, cost effective, and associated with great patient satisfaction [15, 21–23, 26, 28–30].

Hemorrhoidal bleeding is both a major symptom and a treatment complication [1, 4, 5]. Patients with congenital or acquired (induced by antithrombotic therapy) bleeding disorders (BD) are vulnerable groups, with higher risk of bleeding. In these patients, HD management is more challenging as RBL and surgery might be contraindicated or require withholding of antithrombotic therapy, increasing the risk of thrombosis [1, 11, 31, 32].

With the increase in general life expectancy and high prevalence of cardiovascular disease, there is a growing use of antiplatelet and anticoagulant therapy, [33-36] which is associated with gastrointestinal bleeding risk ranging from 1.5 to 4.5% [37-42]. Patients with congenital BD, including hemophilia A and von Willebrand disease (VWD), are also predisposed to spontaneous, traumatic, and intervention-related bleeding. Gastrointestinal bleeding is at least two times more frequent and can account for half of all bleeding-related acute care admissions in these patients [43-45].

The management of HD in patients with congenital and acquired BD is far from optimally defined. Considering their higher bleeding risk and increased rate of surgical complications, they should benefit from less invasive office-based procedures for HD. Recently, Fernandes et al. [21] reported a promising triad of high efficacy, high tolerability, and high safety of PSF in a significantly large population that included patients with BD [15, 21]. More robust data on efficacy and safety of PFS treatment on these patients is required.

The aim of our study was to prospectively evaluate the efficacy and safety of PSF in the treatment of internal refractory HD grades I to III, comparing outcomes of patients with and without BD.

Materials and methods

Study design

We conducted a prospective, multicentre, cohort study enrolling patients with symptomatic HD grades I to III referred to the Proctology outpatient clinics of three tertiary hospitals.

The study was approved by the ethics committees of the intervening institutions and was registered at ClinicalTrials.gov with the identifier NCT04188171.

Participant selection

Inclusion criteria

Adult patients with HD grades I to III refractory to conservative therapy for at least 4 weeks (topical ruscogenin and trimebutine and oral diosmin), referred to the proctology outpatient clinics of three tertiary hospitals (Centro Hospitalar Universitário do Porto, Porto; Hospital da Senhora da Oliveira, Guimarães; and Hospital Professor Doutor Fernando Fonseca, Amadora), submitted to PFS from August 1st, 2018 until February 1st, 2020.

All participants had lower gastrointestinal endoscopy prior to inclusion.

Participants were assigned to one of two groups: group A, without BD (normal hemostasis laboratory tests and absent hemorrhagic symptoms) or group B, with BD (congenital BD or acquired due to antithrombotic therapy).

Exclusion criteria

The following patients were excluded: patients with known allergy to polidocanol, liver cirrhosis, inflammatory bowel disease, immunosuppression, other concomitant symptomatic perianal disease, pregnant and lactating women, history of HD office-based or surgical treatment in the previous 6 months.

Visits and outcomes

In the first visit, demographic data, HD baseline severity and presence and type of BD were collected. HD baseline severity was assessed using the Goligher classification (ESM Table 1) [12], the hemorrhoidal disease bleeding grade (HDBG) (ESM Table 2) and the Sodergren hemorrhoid symptom severity (SHSS) scoring system (ESM Table 3) [9, 10]. All patients received information about the enrollment and signed informed consent.

Table 1

Baseline characteristics and severity of hemorrhoidal disease of the participants (group A – without bleeding disorder; group B – with bleeding disorder)

	All (n = 228)	Group A (n = 155)	Group B (n = 73)	p
Age (years): Mean ± SD	59.4 ± 15.9	54.3 ± 15.0	70.1 ± 12.0	< 0.001
Gender: n (%)				0.118
Female	114 (50.0)	83 (53.5)	31 (42.5)
Male	114 (50.0)	72 (46.5)	42 (57.5)
BMI: Mean ± SD	26.2 ± 4.5	26.0 ± 4.5	26.7 ± 4.5	0.312
Goligher grade: n (%)				0.054
I	45 (19.7)	36 (23.2)	9 (12.3)
II or III	183 (80.3)	119 (76.8)	64 (87.7)
Hemorrhoidal disease bleeding grade: n (%)				< 0.001
1	42 (18.4)	40 (25.8)	2 (2.7)
2	166 (72.8)	111 (71.6)	55 (75.4)
3	20 (8.8)	4 (2.6)	16 (21.9)
Sodergren hemorrhoidal symptom severity score: median (IQR)	7 (4)	7 (4)	10 (3)	0.019

SD standard deviation, IQR interquartile range

Tests used to compare variables between groups: T test (Age and body mass index); Chi-square test (Gender, Goligher grade and initial bleeding grade); Mann–Whitney test (Sodergren score)

Table 2

Efficacy outcomes (intervention period)

	All (n = 228)	Group A(n = 155)	Group B(n = 73)	p
Therapeutic success—n (%)
Yes	213 (93.4)	144 (92.9)	69 (94.5)	0.646
No	15 (6.6)	11 (7.1)	4 (5.5)
Number of treatment sessions—Mean ± SD	1.51 ± 0.74	1.43 ± 0.65	1.68 ± 0.86
1 session—n (%)	145 (63.6)	103 (66.5)	42 (57.5)	0.013
2 sessions—n (%)	50 (21.9)	38 (24.5)	12 (16.4)
3 sessions—n (%)	33 (14.5)	14 (9.0)	19 (26.0)
Polidocanol dosage (total)—Mean ± SD	22.6 ± 10.9	22.5 ± 10.5	22.9 ± 11.7	0.763
Bleeding grade variation*—Mean ± SD	− 1.54 ± 0.71	– 1.39 ± 0.70	− 1.85 ± 0.64	< 0.001
Sodergren score variation*—Mean ± SD	− 7.31 ± 3.70	– 7.14 ± 3.70	− 7.67 ± 3.70	< 0.001

SDstandard deviation

*Variable computed as measurement in the end of the intervention period minus baseline

Tests used to compare variables between groups: T test (Average number of treatment sessions; Polidocanol dosage, Sodergren score variation); Mann–Whitney test (Bleeding grade variation, Goligher grade variation); Chi-square test (Therapeutic success)

Table 3

Safety outcomes (complications)

	All (n = 228)	Group A (n = 155)	Group B (n = 73)	P
Global complications—n (%)	26 (11.4)	19 (12.3)	7 (9.6)	0.554
Mild	25	19	6
Severe	1	0	1
Bleeding – n (%)	11 (4.8)	7 (4.5)	4 (5.5)	0.751
Mild	10	7	3
Severe	1	0	1

Tests used to compare variables between groups: Chi-square test

This cohort study included an intervention period (3 months) for evaluating efficacy and safety outcomes and a follow-up period (1 year) to assess for recurrence of disease.

Efficacy evaluation: intervention period and follow-up

The primary outcome for efficacy evaluation during the intervention period was therapeutic success, defined by an improvement in HDBG and SHSS score over baseline.

The required number of sessions (maximum of 3, at 1-month intervals) was decided by clinical and anoscopic evaluation: if after a month from the last intervention the patient had no significant HD on anoscopy, a HDBG score ≤ 1 and a SHSS = 0, he would not be candidate to further therapy. Therapeutic failure was defined by maintenance or worsening of the initial HDBG and SHSS after 3 treatment sessions.

Number of office-based therapy sessions was defined as secondary efficacy outcome.

The efficacy outcome during the follow-up period was recurrence of disease (for those with therapeutic success), defined by a SHSS and HDBG score greater than at the end of the intervention period. Regardless of the number of treatment sessions, all participants were evaluated for recurrence at consecutive periods of 3 months for a 12-month period.

Safety evaluation

PFS-related complications were reported throughout the study. These were classified as mild if limited (e.g., pain/discomfort, minor bleeding, external hemorrhoidal thrombosis not requiring intervention), or severe if implying additional intervention, clinical risk and/or long-term effect (e.g., bleeding requiring blood transfusion, with hemodynamic instability or need of urgent surgery; external thrombosis requiring surgical intervention; urinary retention, prostatic infection, or sexual dysfunction in men; perineal abscess or sepsis).

Procedures and technical aspects

Procedures were performed on an outpatient basis, without use of sedation or local anesthesia, by three experienced proctologists. The patients with congenital BD did not have prior replacement therapy and those with acquired BD did not suspend antithrombotic therapy. A cleaning enema was prescribed before each session.

Polidocanol foam was prepared according to the Tessari´s technique, using 4 ml of liquid polidocanol 3% (Aethoxysklerol®) mixed with 16 ml of air in two disposable 20 mL syringes, through a three-way tap [25, 46] (Fig. 1). The sclerosant was applied shortly after preparation to preserve stability, according to the Blanchard’s technique (Fig. 2), through a disposable transparent anoscope, with the patient in genupectoral position, using an intravenous 20G needle adapted to a 10 cm reusable extender. The procedure has a fast learning curve, comparable to RBL. It could be performed on > 1 hemorrhoidal pile (depending on the number of engorged hemorrhoidal cushions identified during anoscopy), with a maximum dose of 20 mL per session (each pile was injected until significant resistance was felt on the syringe plunger).

Fig. 1

Polidocanol foam preparation (Tessari´s technique)

Fig. 2

Schematic representation of polidocanol foam sclerotherapy (according to Blanchard’s technique)

Statistical analysis

Differences in means were assessed with Student’s t test and differences in medians with the Kruskal–Wallis test. Comparison of categorical variables was assessed using the Chi-square test or Fisher’s exact test, where appropriate. Progression free-survival was compared using the Log Rank (Mantel-Cox) test. Cox regression was used to assess risk factors for recurrence and binary logistic regression to assess the risk factors for the occurrence of complications. The IBM® SPSS® statistics software version 26.0 was used for all the statistical analysis. A p value < 0.05 was regarded as statistically significant.

Results

Baseline characteristics

From a total of 261 patients (24 patients did not meet inclusion criteria and 9 declined to participate), 228 were enrolled in the study (male/female: 114/114; mean age: 59.4 ± 15.9 years). One hundred and fifty-five patients were included in group A (without BD) and 73 patients in the group B (with BD) (Fig. 3). Group B was further divided into 7 subgroups according to type of BD (Fig. 4). Sixty-four patients were on antithrombotic therapy (including an antiplatelet or anticoagulant drug or both) and 9 patients had hereditary BD including VWD (n = 3), severe hemophilia A (n = 2), inherited macrothrombocytopaenia (n = 1) and hyperfibrinolysis syndrome (n = 3), with bleeding score by ISTH-BAT (international society of thrombosis and hemostasis – bleeding assessment tool) consistent with moderate hemorrhagic disease. [47]

Fig. 3

Study flowchart. BD: bleeding disorders

Fig. 4

Participants enrolled in the study (Group B subgroups). ASA aminosalicylic acid, DOAC Direct oral anticoagulants

Considering the baseline characteristics of the participants (Table 1), the mean age was significantly higher for Group B (70.1 ± 12.0 years vs 54.3 ± 15.0 years, p < 0.001). Regarding HD baseline severity, significantly more patients in the group B had HD with HDBG 2 or 3 (74.2% vs 97.3%, p < 0.001) and SHSS score was also significantly higher for this group (7 vs 10, p = 0.019).

Efficacy evaluation: Intervention period

The overall therapeutic success rate was 93.4% (n = 213), with no significant differences between groups (92.9% vs 94.5%, p = 0.646). Treatment was unsuccessful in 11 patients from group A and 4 patients from group B (Table 2).

The average number of sessions per patient was 1.51 ± 0.74 (min = 1, max = 3), significantly higher for group B (1.68 ± 0.86 vs 1.43 ± 0.65, p = 0.013).

The average volume of polidocanol injected was 22.6 ± 10.9 mL (group A: 22.5 ± 10.5 mL vs group B: 22.9 ± 11.7 mL; min. 8 mL, max. 60 mL), without significant differences between the two groups (p = 0.763).

Safety evaluation: type and rate of complications

Complications (Table 3) occurred in 11.4% (n = 25) of the patients (group A: 12.3% vs group B: 9.6%, p = 0.554). Most were mild (96.2%): pain/discomfort (n = 14); minor bleeding (n = 10) and dyschezia (n = 1). Severe complications occurred in 1 patient group B (rectal bleeding requiring blood transfusion).

Bleeding complications were reported in 4.8% (n = 11) of the participants with no significant differences between the two groups (group A: 4.5%, n = 7 vs group B: 5.5%, n = 4; p = 0.751).

None of the baseline characteristics was a significant predictor for the occurrence of complications (Table 4).

Table 4

Hazard ratios for the risk of complications

	OR	(95% CI)	P
Age	1.002	(0.972, 1.032)	0.919
BMI	0.892	(0.793, 1.004)	0.057
Baseline Goligher grade
II	0.376	(0.112, 1.264)	0.114
III	0.419	(0.106, 1.657)	0.215
Baseline hemorrhoidal disease bleeding grade
2	0.572	(0.172, 1.900)	0.361
3	0.810	(0.116, 5.673)	0.832
Baseline Sodergren hemorrhoidal symptom severity score	1.109	(0.946, 1.301)	0.202
Group (B)	0.928	(0.263, 3.273)	0.908

OR odds ratio, CI confidence interval, BMI body mass index

In subgroup analysis, we found no significant differences in rate of complications from PFS between group B subgroups (Table 5).

Table 5

Safety outcomes (group B subgroups)

	Total—n	Complications—n (%)	p
Group A (without BD)	155	19 (12.3)
Group B (All except ASA alone)	56	6 (10.7)	0.533
Group B (Anticoagulant only)	26	4 (15.4)	0.211
Group B (Antiplatelet single)	23	1 (4.3)	0.302
Group B (Anticoagulant + antiplatelet)	9	1 (11.1)	0.868
Group B (Dual antiplatelet)	6	0 (0.0)	0.405
Group B (DOAC users)	18	3 (16.7)	0.240
Group B (Hereditary BD only)	9	1 (11.1)	0.868

ASA aminosalicylic acid, DOAC direct oral anticoagulants, BD bleeding disorder

Tests used to compare variables between groups: Chi-square test

Efficacy evaluation: Follow-up period

Two hundred and thirteen patients were included in the follow-up period (group A n = 144; Group B n = 69); 82.5% and 80.9% patients from groups A and B, respectively, showed no recurrence at 1-year of follow-up. Recurrence rates presented no significant differences between groups at any follow-up time point (Table 6; Fig. 5). Also, the mean time for recurrence at 12 months was not significantly different between the groups (group A: 11.7 ± 0.10 months vs group B: 11.7 ± 0.11 months, p = 0.786) (Table 7). The probability of recurrence was higher for patients with higher baseline SHSS scores (p = 0.007). No other characteristics were predictors of recurrence (Table 8).

Table 6

Efficacy outcomes (disease recurrence)

	All (n = 213)	Group A (n = 144)	Group B (n = 69)	p value
Recurrence at 3 months				0.488
No: n (%)	212 (99.5)	143 (99.3)	69 (100.0)
Yes: n (%)	1 (0.5)	1 (0.7)	0 (0.0)
Deceased: n (%)	0 (0.0)	0 (0.0)	0 (0.0)
	(n = 212)	(n = 143)	(n = 69)
Recurrence at 6 months				0.366
No: n (%)	207 (99.5)	140 (97.9)	67 (97.1)
Yes: n (%)	4 (1.9)	3 (2.1)	1 (1.4)
Deceased: n (%)	1 (0.5)	0 (0.0)	1 (1.4)
	(n = 207)	(n = 140)	(n = 67)
Recurrence at 9 months				0.448
No: n (%)	191 (92.3)	130 (92.9)	61 (91.0)
Yes: n (%)	15 (7.2)	9 (6.4)	6 (9.0)
Deceased: n (%)	1 (0.5)	1 (0.7)	0 (0.0)
	(n = 191)	(n = 130)	(n = 61)
Recurrence at 12 months				0.894
No: n (%)	173 (90.6)	118 (90.8)	55 (90.2)
Yes: n (%)	18 (9.4)	12 (9.2)	6 (9.8)
Deceased: n (%)	0 (0.0)	0 (0.0)	0 (0.0)

Tests used to compare variables between groups: Chi-square test

Fig. 5

Recurrence Probability (Cox regression)

Table 7

Mean time for recurrence

Mean time for recurrence (months)	Mean ± SE	(95% CI)	p
Group A	11.71 ± 0.10	(11.52, 11.90)	0.786
Group B	11.74 ± 0.11	(11.52, 11.95)

SE standard error, CI confidence interval

Tests used to compare variables between groups: Log Rank (Mantel Cox) tes

Table 8

Hazard Ratios for the risk of recurrence

	OR	(95% CI)	p
Age	1.023	(0.996, 1.050)	0.094
BMI	0.994	(0.916, 1.077)	0.875
Baseline Goligher grade			0.890
II	0.841	(0.273, 2.591)	0.763
III	0.737	(0.208, 2.615)	0.636
Baseline hemorrhoidal disease bleeding grade			0.311
2	1.539	(0.471, 5.025)	0.475
3	3.194	(0.661, 15.428)	0.148
Baseline Sodergren hemorrhoidal symptom severity score	1.176	(1.045, 1.323)	0.007
Group (B)	0.394	(0.147, 1.059)	0.065

OR odds ratio, CI confidence interval, BMI body mass index

Two patients, one in each group, died of unrelated causes (respiratory/pulmonary infections), at 6 and 9-month follow-up.

Discussion

The aim of our study was to prospectively evaluate the efficacy and safety of PFS in the treatment of symptomatic internal HD grades I to III in patients with a congenital or acquired bleeding disorder (group B), compared to patients without such disorders (group A). To the best of our knowledge, this is the first study to specifically evaluate clinical outcomes in this challenging population, known for having higher bleeding risk related to HD interventions. This prospective, multicentre, cohort study demonstrated that PFS was effective and safe in both groups of patients.

The mean age in our cohort was significantly higher for patients with BD which can be explained by the fact that older patients are more prone to cardiovascular comorbidities and, as such, need antithrombotic therapy more often. Also, at baseline, the patients with BD had more symptomatic HD with more severe bleeding grade.

We found a significant decrease in HDBG and SHSS scores after the PFS, in both groups of patients. Therapeutic success was reported in 94.5% and 92.9% of the patients with and without BD, respectively, without significant differences between the groups. These results are similar to those in the pioneer study of Moser et al. [22] that reported a success rate (assessed by the HDBG) of 88% and 98% after the first and the second PFS session, respectively. Our success rate is higher than that reported by Lobascio et al. [28] and our group [23] in a randomized controlled trial comparing PFS with RBL in the treatment of HD grades I-III. Also, Fernandes et al. [21] in a large cohort of patients with HD grades I-IV (including 210 patients under antithrombotic therapy), documented a 98% decrease in self-reported bleeding and reduction of prolapse in 86% (out of 1112 re-examined patients) with PFS, concluding that it was effective and safe even in patients on antithrombotic therapy. [15, 21] In a short-term report of PFS used as a bridge treatment in HD grades III-IV during the COVID-19 pandemic [29], all the patients had resolution of bleeding without complications while awaiting surgery. PFS treatment was considered effective, safe, repeatable, and associated with good patient satisfaction. The efficacy of PFS derives from its mechanism of action, which induces a local inflammatory reaction that anchors the hemorrhoidal tissue, leads to obliteration of the vascular bed and consequent fibrosis and tissue shrinkage [27, 28]. This might explain the clinical benefit as regards the major symptoms of hemorrhoidal disease, including bleeding, pain, prolapse, and relief of soiling and pruritus, due to reduction of vascular congestion.

Our number of PFS treatment sessions per patient was significantly higher for the group with BD which may be due to the higher baseline severity of HD in this group of patients. The number of therapy sessions in the group of patients without BD is in line with the previously reported by Moser et al. [22] and us [23]. The average polidocanol dose was similar to previous studies [23] and between the groups.

Concerning the safety of PFS treatment, our overall complications rate was similar to previous data published by our group [23], with pain being the most frequent post-procedure complication. However, the definition of pain, including its intensity and duration, varied in previous studies precluding an accurate comparison. Moser et al. [22] described the higher pain rates since they considered very short duration pain (resolving in less than 15 min). In that study 97% of the patients remained pain free between PFS sessions.

We did not find significant differences in the rate or type (mild or severe) of complications between patients with and without BD, and none of the baseline characteristics was a significant predictor for the occurrence of complications. Although none of the group B subgroups had a significantly higher incidence of complications, we noted a higher rate of complications in anticoagulated patients, particularly with DOACs. We should consider a possible small sample size bias that could attenuate potential significant differences.

There are reports of serious complications of HD sclerotherapy such as acute prostatitis [22], major bleeding, urinary retention and sepsis requiring surgery [21]. However, the incidence of major complications appears to be much more common with RBL [18]. The only severe complication in our cohort was bleeding requiring blood transfusion in a patient with BD (subgroup of anticoagulant + antiplatelet therapy).

Bleeding has been described as the most common complication of HD treatments. RBL is associated with bleeding rates ranging from 2.1% to 7% including minor and significant bleeding requiring medical evaluation or transfusion support [20]. There is also an increased risk of late (10–14 days after RBL) and potential life-threatening bleeding for patients on antithrombotic therapy [18]. The standard recommendation for minimizing bleeding risk is to withhold antithrombotic therapy for 7–10 days prior to, and after, hemorrhoidal procedures like RBL or excisional haemorrhoidectomy [11, 32]. Some studies on RBL [31] and surgical transanal hemorrhoidal dearterialization (TDH) [32] described a similar risk of bleeding with different suspension protocols and even under anticoagulation [32], without sufficient evidence, however, to modify current recommendations. Our overall bleeding rate of 4.8% was slightly lower than the 6% persistent bleeding described by Lobascio et al. [28]. We found a 5.5% bleeding rate after PFS for patients with BD, without significant differences comparing to patients without BD, while Fernandes et al. [21] reported 9% significant bleeding (referring to 22 patients under double antithrombotic therapy), in contrast to 0.05% bleeding in patients without antithrombotic therapy. In our study, none of the patients discontinued antiplatelet or anticoagulation therapy prior to PFS treatment and no thrombotic or cardioembolic complications were reported. PFS treatment may thus provide a safer approach for these patients.

Recurrence rates were comparable in both groups with 82.5% and 80.9% (groups A and B, respectively) of the patients who had therapeutic success showing no HD recurrence at 1-year follow-up. Previous data showed similar recurrence rates for PFS [23, 28] and significantly higher ones with other techniques: recurrence of prolapse of up to 34% with liquid polidocanol [16] and a bleeding recurrence ranging from 10–46% for RBL [18].

There are several strengths in our study. First, the relevance of assessing clinical outcomes of PFS treatment in patients with HD and inherited or acquired BD. These patients are a vulnerable population, more prone to bleeding complications when undergoing invasive procedures, where HD management is much more challenging. We assessed clinical outcomes using validated severity scores, as an attempt to overcome subjective interpretations concerning efficacy of PFS in HD. Our study protocol was multicentric, which aimed to improve generalizability of data, and included a one-year follow-up period, which allowed for a more accurate evaluation of recurrence.

However, our study has some limitations. The heterogeneity of the antithrombotic therapy and the small sample size of the subgroups within the BD group precluded a more robust analysis. We did not account for the possible influence of distinct antiplatelet therapy dosage on rate of bleeding. Also, the 12-month follow-up is short considering the chronic and relapsing pathogenesis of HD.

Our results regarding the efficacy and safety of PFS for the treatment of internal HD grades I to III are aligned with other recent data which support the use of PFS as a first line procedure. PFS decreased hemorrhoidal bleeding and symptom severity, and was associated with a low incidence of complications even in patients with BD, with no need to carry out any bleeding prophylaxis or discontinue antithrombotic medications thus avoiding an eventual increase in the thrombotic risk.

Conclusions

Our results suggest that PFS is just as effective and safe for treatment of HD in patients with BD as in those without bleeding dyscrasia. Further larger scale studies are needed to determine whether PFS can become the established standard of care in the treatment of HD in patients with BD, as it may offer these patients a safe and effective office-based treatment, without the need to stop antithrombotic drugs or perform bleeding prophylaxis.

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