Intralesional Platelet-rich Plasma Research Articles

Comparison of Efficacy of Autologous Platelet Rich Plasma Therapy With 5% Topical Minoxidil Spray in Treating Alopecia Areata: A Head-to-Head Assessment of Novel Approaches.

Alopecia areata (AA) remains one of the most challenging afflictions encountered in dermatology clinics. It is characterized by an autoimmune-mediated inflammatory process of and around hair follicles, causing reversible, non-scarring hair loss. With the ongoing search for optimal treatment strategies, the potentially positive role of autologous platelet-rich plasma (PRP) therapy as well as minoxidil has been reported in various studies; however, the comparison of the two treatment modalities is largely underexplored. This research aims to compare and assess the effectiveness of intralesional PRP with topical minoxidil therapy in AA to identify efficacious management options amongst the newly described treatment modalities. The research work was conducted over four months and included 40 (31 males and 9 females) patients suffering from alopecia areata. They were divided into Group A, which was administered monthly autologous PRP injections, while Group B was given daily topical 5% minoxidil therapy. In group A, four treatments of PRP were given, each one month apart. While in group B, daily topical minoxidil spray was administered for the same duration. The alopecia areata severity grade was recorded by employing the "Severity of Alopecia Tool" (SALT) scoring system. The pre- and post-treatment SALT scores were noted and compared at each monthly visit. The study comprised nine (22.5%) female and 31 (77.5%) male patients. At the beginning of the study and after one month of treatment, the difference in the SALT score was not statistically significant between the two groups, suggesting that both interventions had similar effects during the early stages of the treatment. At two months, a statistically significant difference emerged (p-value 0.037), indicating that a more significant fall in the SALT score was observed with autologous PRP treatment compared to topical minoxidil. After four months, a highly significant difference was noted between the two groups (p-value <0.0001), implying that intralesional PRP therapy led to a far more significant decrease in the SALT score compared to topical minoxidil therapy. Monthly intralesional autologous PRP therapy for four months manifests better outcomes in alopecia areata than daily 5% topical minoxidil therapy.

Comparison of pain relief among patients with chronic plantar fasciitis treated with intralesional platelet-rich plasma injection versus corticosteroid injection in a tertiary care centre in Kerala - a prospective study

Background: Aim of the study was to compare pain relief and functional outcome and between intralesional autologous platelet rich plasma injection (PRP) versus corticosteroid injection in the treatment of plantar, and fasciitis by using visual analogue score and American Orthopaedic Foot and Ankle Society (AOFAS) score. Methods: The sample size for the study was 30 patients attending Dr. Somervell Memorial CSI Medical College. Patients were divided into two groups (PRP versus steroid) of 15 each. The study follows a prospective observational design with follow up at 2 weeks, 2 months and 3 months post procedure. The functional outcome of patients in each group was assessed using the visual analog scale and AOFAS score. Results: Post-procedure, a significant decrease in VAS score was seen in patients treated with PRP injection (8.73 to 2.27) than those treated with Steroid injection (8.8 to 3.53). Also, there was a significant improvement in the AOFAS score from 72.73 to 88.67 while for those patients treated with steroid injection, the AOFAS score was comparatively low (65.87 to 82.2). Conclusions: Plantar fasciitis is a prevalent condition in our community, and many treatment options typically offer only temporary relief from symptoms. Intralesional PRP injection emerges as a dependable treatment method that fosters the healing process of the affected fascia, resulting in improved functional outcomes. Our study indicates that a singular administration of platelet-rich plasma injection for plantar fasciitis yields substantial pain relief compared to the local steroid injection.

A Comparative Study to Evaluate the Efficacy of Topical and Infiltrative Anesthesia for Dermatosurgery Through a Subject-Oriented Approach.

Introduction The skin, along with its subcutaneous tissue, constitutes one of the major organ systems of the human body. Dermatosurgery is the branch dealing with skin conditions that operate at the level of skin, without disturbing the milieu intérieur of the human organ system. Materials and methods A cross-sectional study was undertaken, which included 100 patients comprised of 50 patients in each group. For group A, the topical anesthetic agent used was a eutectic mixture of topical 2.5% lignocaine and 2.5% prilocaine cream (EMLA); for group B, infiltration anesthesia with 2% lignocaine injection. Patients satisfying the inclusion and exclusion criteria were recruited for the study. All the participants were requested to rate the pain at the time of drug administration, during the dermatosurgical procedure, and post-procedurally with a visual analogue scale (VAS) separately. Results In this study, 50% of the participants were of the age group of 21-40 years. Males constituted 57.8% whereas females constituted 42.2%. The common procedures performed in the study were electrocautery at 37%, intralesional platelet-rich plasma (PRP) at 16%, and intralesional steroid at 7%. In group A, the VAS score during drug administration was 0. In the group B, 70% had a VAS score of 4-6, and 30% had a VAS score of 1-3 pre-procedurally. The mean VAS score during procedure was 3.06 for group A and 1.03 for group B. Conclusion The study inferred that topical anesthesia is a better choice in superficial dermatosurgical procedures for providing adequate anesthesia and improved compliance when compared to infiltrative anesthesia.

Study Protocol: Autologous Platelet-Rich Plasma (PRP) Therapy in the Treatment of Pyoderma Gangrenosum: A Prospective, Open-Label, Randomized, Split-Ulcer Trial to Evaluate the Efficacy of Platelet-Rich Plasma Therapy in the Treatment of Chronic Pyoderma Gangrenosum

BACKGROUND Pyoderma gangrenosum (PG) presents as an ulceration of the lower extremities with deep, undermining, and violaceous borders. The disease is an orphan disease without any FDA-approved treatments. OBJECTIVE This study aims to evaluate the efficacy and safety of intralesional injectable and topical platelet-rich plasma (PRP) therapy in the treatment of chronic pyoderma gangrenosum ulcerations. METHODS Methodologically, this study will be conducted as a prospective, randomized, open-label split-ulcer study in patients with confirmed PG by PARACELSUS score. In each patient, up to three separate ulcerations will be randomized to receive either monthly intralesional PRP injections or a topical PRP solution at 0, 4, 8, and 12 weeks, while the third target lesion will receive standard wound care only. Patients will be followed up with at 16 weeks, one month after the completion of treatment. The primary endpoint for this study will be the composite proportion of the target ulcers achieving either complete resolution or a 50% reduction in the surface area at week 12. CONCLUSIONS This study intends to demonstrate the efficacy of an intralesional injectable or topical PRP therapy in the treatment of PG. If successful, PRP treatment may offer a new and effective option for patients with this debilitating disease.

Study of effect of topical mometasone with intralesional platelet-rich plasma versus topical mometasone alone in the treatment of alopecia areata

Background: Alopecia areata (AA) is an autoimmune disorder and exhibits non scarring alopecia. Currently, there is no definitive cure, platelet rich plasma (PRP) has emerged as a newer modality for non-cicatricial alopecias such as AA. This study was conducted to compare the efficacy and adverse effects of topical mometasone with PRP versus topical mometasone alone in the treatment of patients of AA. Methods: This study was conducted on a total of 100 clinically diagnosed cases of AA. Patients in group A were subjected to intradermal injection of autologous PRP every 3 weeks along with topical mometasone cream 0.1% daily for 12 weeks. Group B was treated with topical mometasone cream 0.1% once a day locally over affected site for 12 weeks. Results: Baseline SALT score of group A was 6.05±5.36 while that of group B was 6.62±4.39. The mean SALT score of group A declined to 0.94±1.69 and that of group B 2.19±1.76 over a period of 20 weeks. Excellent response was observed by 12 and 5 patients of group A and group B respectively. Minor side effects like pain was seen in 10 patients (20%) in group A, while atrophy was seen in 2 patients of group B. Conclusions: This is the first ever study evaluating the additional benefit of intralesional PRP. In this study, it was found that adding intralesional PRP with topical mometasone 0.1% cream has higher efficacy and early improvement than topical mometasone alone, in the treatment of AA.

A comparative study of narrowband-ultraviolet B plus intralesional normal saline versus narrowband-ultraviolet B with platelet rich plasma in treatment of vitiligo

Background: Treatment of vitiligo remains a challenge and there is no universal consensus about optimal treatment. Platelet rich plasma contains several growth factors and is being used as an effective treatment of several dermatological disorders. Now it is clear that along with melanocytes, keratinocytes and fibroblasts are also involved in pathogenesis of vitiligo. The aim of this study was to compare the effect of narrowband-ultraviolet B (NB-UVB) with platelet rich plasma versus NB-UVB and intralesional normal saline in treatment of vitiligo. Methods: A prospective observational study was done between March 2016 to August 2017 on patients of vitiligo attending BRD Medical College, Gorakhpur. A total of 80 patients were enrolled with symmetrical lesions. For each patient one side was treated with NB-UVB along with intralesional platelet-rich plasma (PRP) and other side with NB- UVB plus intralesional normal saline was given. Intralesional PRP and intralesional normal saline was given on an interval of every 2 weeks for 4 months and patients were receiving NB-UVB therapy thrice weekly on alternate day. Results: We found that combination of PRP with NB UVB had statistically significant improvement as compared to NB UVB alone with pigmentation detected in 60% patient in combined site versus 20% in NB UVB plus intralesional normal saline. Conclusions: Intradermal PRP injections along with NB-UVB are efficacious, safe, cheap and easy technique in treatment of vitiligo it is more efficacious when compared to NB-UVB therapy. It also shortens the duration of NB-UVB therapy.

The Effectiveness of Intralesional Platelet Rich Plasma in Recurrent Aphthous Stomatitis Compared With Triamcinolone Acetonide.

Recurrent aphthous stomatitis (RAS) is an autoimmune disease that affects 25% of the population, with no cure until now. Intralesional triamcinolone acetonide (TA) injections are an effective classic treatment for RAS; and, more recently, intralesional platelet rich plasma (PRP) has been used to manage oral lesions of some autoimmune diseases. To try intralesional PRP injections in the management of recurrent oral ulceration of Behcet's disease and compare their clinical effect with intralesional TA injections; and to study the effects of both treatments on the serum level of interleukin (IL)-1&beta;, IL-6, and tumor necrosis factor (TNF)-&alpha;. Thirty patients diagnosed with RAS were recruited for this trial, with a male to female ratio of 1:1, and ages ranging from 12 to 66 years. For 6 months, 15 patients were treated monthly with intralesional PRP injections and the other 15 were treated monthly with intralesional TA injections. The clinical effects of both treatments were registered in the oral clinical manifestation index (OCMI), as were their effects on the serum levels of IL-1&beta;, IL-6, and TNF-&alpha;. The OCMI of PRP-treated patients initially ranged from 8 to 23 with a mean&plusmn;SD of (13.5&plusmn;4.6). This mean decreased to 5.7 by the end of month 6, with a statistically highly significant P-value compared with baseline. The OCMI of TA-treated patients initially ranged from 8 to 20 with a mean&plusmn;SD of (13.5&plusmn;3.8). This mean decreased to 10.5 by the end of month 6, with a statistically significant P-value compared with baseline. Both treatments significantly decreased the serum levels of IL-1&beta;, while only PRP significantly decreased the TNF-&alpha;. Intralesional PRP injections are a new, safe, and effective treatment for RAS. J Drugs Dermatol. 2023;22(4): doi:10.36849/JDD.7218 Citation: Kadhim MAA, Musa HD, Barzanji HAA. The effectiveness of intralesional platelet rich plasma in recurrent aphthous stomatitis in comparison with triamcinolone acetonide. J Drugs Dermatol. 2023;22(4):398-403. doi:10.36849/JDD.7218.

Effects of Platelet-Rich Plasma in Tear Size Reduction in Partial-Thickness Tear of the Supraspinatus Tendon Compared to Corticosteroids Injection

ObjectivesCorticosteroid (CS) injection is commonly used in partial-thickness rotator cuff tears to decrease pain. However, this could result in unwanted side effects, such as tendon rupture. Alternatively, platelet-rich plasma (PRP) injection is frequently used to treat tendinopathies because it enhances healing. This study aimed to compare the differences in tear size and functional scores between intralesional PRP and subacromial CS injections.MethodsPatients with symptomatic partial-thickness tears of the supraspinatus tendon who underwent conservative treatment for ≥ 3 months were enrolled. All patients underwent magnetic resonance imaging (MRI) to confirm the diagnosis. Fourteen and 15 patients were randomized to receive intralesional PRP and subacromial CS injections, respectively. Tears were measured in the coronal and sagittal planes. The patients underwent another MRI 6 months after the injection. Tear size was compared between the two MRI results. The American Shoulder and Elbow Surgeons Shoulder score (ASES) and Constant–Murley score (CMS) were also obtained.ResultsThe baseline data were similar between the groups. In the coronal plane, PRP and CS showed tear size reductions of 3.39 mm (P = 0.003) and 1.10 mm (P = 0.18), respectively. In the sagittal plane, PRP and CS showed tear size reductions of 2.97 mm (P = 0.001) and 0.76 mm (P = 0.29), respectively. Functional scores improved 6 months after injection in both groups, but PRP showed better functional scores than CS (P = 0.002 for ASES, P = 0.02 for CS).ConclusionIntralesional PRP injection can reduce the tear size in partial-thickness tears of the supraspinatus tendon. Subacromial steroid injection did not significantly affect the tear size. While CS improved functional scores compared with baseline, PRP resulted in better improvement 6 months post-injection.Trial registration Thai Clinical Trials Registry, TCTR20210428004. Registered 28 April 2021-retrospectively registered, TCTR20210428004.

Intra-Lesional Platelet Rich Plasma Injection vs Extracorporeal Shockwave Therapy for the Treatment of Chronic Resistant Plantar Fasciitis

Aims and Objectives a. The objective of this study is to evaluate and compare the role of two novel modalities: Intralesional PRP (Platelet Rich Plasma) injection and Extra Corporeal Shockwave Therapy (ESWT) in pain reduction in patients with chronic resistant plantar fasciitis. b. With the help of this study, both the treatment modalities are compared and evaluated as to which modality is better than the other to treat recalcitrant plantar fasciitis in order to facilitate to decrease morbidity in chronic resistant cases.

Combined intralesional platelet-rich plasma and intralesional steroid versus intralesional steroid alone in the treatment of alopecia areata

Background Platelet-rich plasma (PRP) is a promising treatment method of alopecia, but there is a debate about its role in the treatment of alopecia areata. Intralesional steroid is the first-line treatment option for patchy alopecia areata. Combination therapy represents an option for increasing the efficacy of the different lines of treatment.Objective To compare the therapeutic efficacy of traditional treatment of alopecia areata with intralesional injection of triamcinolone acetonide versus combination therapy with intralesional triamcinolone acetonide and intralesional PRP alternatively.Patients and methods In this comparative randomized single-blinded study, 30 patients with two nonadjacent patches of alopecia areata were included. One patch was treated with intralesional triamcinolone acetonide alone (group I) every 4 weeks for 3 months, and the other patch was treated with intralesional triamcinolone acetonide alternating with intralesional PRP (group II) every 2 weeks for 3 months. Evaluation was done by MacDonald Hull and Norris grading and dermoscopy.Results A significant increase in the mean grading score was noted before each intralesional steroid injection session in both groups. However, group II patches treated with intralesional triamcinolone acetonide alternating with intralesional PRP showed significantly higher mean grading score as compared with group I patches treated with intralesional triamcinolone acetonide alone. The dermoscopic features of alopecia areata significantly decrease or disappear at the end of treatment sessions in both groups.Conclusion Combined use of intralesional steroid and intralesional PRP in the treatment of alopecia areata yields better results than using intralesional steroid alone and could be considered as a more effective line of treatment. However, further research studies are needed to determine the optimal dose, intervals, and duration of treatment.

Assessment of various intralesional injections in keloid: comparative analysis

In reaction to skin injury in genetically predisposed persons, the keloid is formed and marked by benignant overgrowth of dermic collagen. Intralesional triamcinolone was used in the treatment of keloids with varying results. Aim Intralesional triamcinolone is a gold standard in treating the keloids in comparison with its effectiveness versus intralesional 5-fluorouracil intralesional verapamil and intralesional platelet-rich plasma. Patients and Methods Several 160 cases were categorized into four groups of each group-containing 40 cases. Group-A (control) treated with intralesional triamcinolone and Group-B intralesional verapamil, Group-C intralesional 5-fluorouracil, and Group-D intralesional platelet-rich plasma. Patients were assessed for clinical response based on a decrease in the patient and observer scar assessment scale (POSAS) at baseline and the end of treatment. Results The mean base-line POSAS score was 91 ± 10.98 SD check-in Group-A, 90 ± 10.85 in Group-B, 89 ± 10.06 in Group-C, and 92 ± 10.84 in Group-D. POSAS score after 24 weeks 36 ± 12.74 in Group-A, 29 ± 10.91 in Group-B, 39 ± 13.74 in Group-C, 36 ± 12.74 in Group-D. Statistically, a significant difference was observed between groups. Conclusion Intralesional verapamil reported to be the most effective therapy and platelet-rich plasma was effective as intralesional triamcinolone acetonide with no serious side effects and 5-fluorouracil was less effective in treating the keloids.

Efficacy of intralesional injections of platelet-rich plasma in patients with oral lichen planus: A pilot randomized clinical trial.

ObjectiveTo evaluate the clinical efficacy of intralesional platelet‐rich plasma (PRP) injections compared to intralesional triamcinolone acetonide (TA) injections in the treatment of erosive oral lichen planus (EOLP).Material and MethodsTwenty patients with EOLP were assigned randomly to either PRP or TA group. Patients received weekly intralesional injections for 4 weeks, and then followed up for 3 months on regular visits every 2 weeks. Pain scores using numerical pain score and clinical score were recorded by a blinded assessor each visit for all patients and remission score at the end of the trial was recorded.ResultsBoth groups showed significant improvement in the clinical parameters (pain and clinical score) “p = .001.” Regarding remission of the lesions, 80% of patients in the PRP group showed complete remission compared to 70% in the TA group. However, there is no statistical significance when comparing the two groups in pain score, clinical score, or remission.ConclusionsPRP injections could be considered as an effective alternative single treatment modality for EOLP. The protocol for this study registered in Clinicaltrials.gov registry under the identifier number: NCT03293368.

Clinical evaluation of efficacy of intralesional platelet-rich plasma injection versus 1064 nm long-pulsed Neodymium:YAG laser in the treatment of inflammatory acne vulgaris in adolescent and post-adolescent patients: a prospective randomized split-face comparative study

Large numbers of local and systemic therapies are available for acne treatment. Common oral or topical retinoids, antibiotics, or keratolytics are used but sometimes are inconvenient, and side effects caused by these conventional therapies prompted a search for effective and safe treatments. This study aimed to evaluate the efficacy of intralesional platelet-rich plasma injection versus 1064 nm long-pulsed Nd:YAG laser in the treatment of moderate inflammatory acne vulgaris in both adolescents and post-adolescent patients. This split-face comparative study was carried out on thirty patients who suffered from moderate inflammatory and non-inflammatory acne vulgaris. The patients were classified into two groups: group I: adolescent (≤ 25 years) and group II: post-adolescent (< 25 years). Each group received four sessions of intralesional PRP injection on one side of the face and a long-pulsed Nd:YAG (1064 nm) laser on the other side with 2 weeks interval. Evaluation was done by blinded dermatologists using photographs and lesions counting and by patient satisfaction. Side effects were also noted. Both groups (adolescents and post-adolescent) showed a high statistically significant improvement of inflammatory as well as non-inflammatory lesions either in PRP or Nd:YAG laser–treated side with no significant difference between the two sides. The intralesional PRP injection and 1064 nm long-pulsed Nd:YAG laser are safe and effective methods for controlling inflammatory as well as non-inflammatory acne vulgaris in both adolescents and post-adolescent patients.

A Split Face Study to Compare the Efficacy of Platelet Rich Plasma Versus Normal Saline Injections in Acne Scars and to Assess the Utility of Ultrabiomicroscopic Sonography in Evaluation of Treatment Response.

Multiple studies have proposed the effectiveness of Platelet rich plasma (PRP) in treatment of atrophic acne scars. But an unanswered question is - whether it is the presence of growth factors in PRP or the mechanical factors during the injection that are responsible for its effectiveness? Also, no study compares PRP as a monotherapy against inert solution like normal saline (NS), that too, in a split face pattern using a non-invasive objective evaluation method. Primary - To compare the efficacy of intralesional PRP and NS injections, in the treatment of atrophic acne scars. Secondary - To assess the side effect profile of the PRP injections. Prospective Interventional Comparative Split Face study. 30 out of 33 patients completed the study and 20 of them were subjected to Ultrabiomicroscopic (UBM) analysis. Each patient received intralesional injections of NS and PRP in a split face pattern at two weekly intervals for five sittings. Treatment response was assessed using Goodman And Baron qualitative grading system, photographic evaluation by two blinded dermatologist and UBM analysis (scar depth & length). All the three methods showed a statistically significant treatment response. However, there was no significant inter group difference and PRP and NS had similar efficacy in treating acne scars. We conclude that subscision like mechanical effect of injecting solution is more important than the nature of the solution in treatment of atrophic acne scars and UBM sonography can be proposed as an objective assessment tool for such studies.

Comparison of therapeutic efficacy of intralesional platelet-rich plasma and topical alpha-glucoside derivative of trihydroxy benzoic acid in melasma: a randomized controlled study

Comparison of therapeutic efficacy of intralesional platelet-rich plasma and topical alpha-glucoside derivative of trihydroxy benzoic acid in melasma: a randomized controlled study

Efficacy and Safety of Intralesional Platelet Rich Plasma (PRP) Therapy in the Management of Chronic Non-healing Leg Ulcers in our Population

Background: Autologous Platelets Rich Plasma (PRP) therapy not only hastens chronic wounds and ulcers healing but also diminishes the rate of amputations of lower leg caused by non-healing recalcitrant ulcers. In this study we have demonstrated the magical results of intralesional autologous PRP in the healing of resistant to heal chronic leg ulcers. Methods: In this metacentric study 26 patients having 30 chronic leg ulcers of more than 6 weeks duration and various etiologies, were treated with intralesional autologous PRP application on weekly basis for a duration of 8 weeks and the final results were calculated by percentage improvement in the volume and area of the ulcer/wound. Results: In our study 26 patient with 30 chronic recalcitrant leg ulcers/wounds were treated with intralesional autologous PRP therapy on weekly basis. Mean age of the included patients was 34.5 years. 19 were male patients and 7 were female. The mean time period of the healing of chronic ulcers was 5.3 weeks. The final mean percentage improvement outcome in the volume and area of the ulcers was calculated as 86% and 88% respectively. Conclusions: PRP therapy is safe, cost effective office based simple procedure in treating recalcitrant chronic leg ulcer/wounds. Keywords: Non-healing, intralesional, autologous platelet rich plasma, chronic ulcers

Intralesional Platelet-Rich Plasma in the Treatment of Oral Lichen Planus: Review Article

Intralesional Platelet-Rich Plasma in the Treatment of Oral Lichen Planus: Review Article

Comparative Study between the Efficacy of Platelet Rich Plasma with Methotrexate and Methotrexate Alone in Treatment of Chronic Plaque Psoriasis

Abstract Background Psoriasis affects up to 3% of the world's population or more than 125 million people. There is an urgent need for new treatment strategy, as up to 50% of patients are not satisfied with current therapies. We evaluated the efficiency of combined platelet rich plasma (PRP) and methotrexate (MTX) injection in management of psoriasis vulgaris and combared it with methotrexate injection only. Objectives The aim of this work is to compare between the clinical efficacy of platelet rich plasma with methotrexate and methotrexate alone in treatment of chronic plaque psoriasis. Patients and Methods Forty patients with chronic plaque psoriasis were divided into two groups. Twenty patients were assigned into combinational treatment group (PRP + MTX) and monotherapy group (MTX alone) consisted of another tweenty patients. All patients in combinational therapy group received autologous intralesional PRP at 0,4 and 8 weeks combined with methotrethate im injection once every week for 12 weeks, while patients in monotherapy group received only methotrexate im injection once every week for 12 weeks. Results There were statistically significant decreased DLQI score after 6 and 12 weeks of treatment in females compared to males only in group B, while no significant differences were found between males and females in group A patients, This could be attributed to the greater concern in females as psoriasis is considered as a cosmotic problem. Conclusion Combination treatment of PRP with MTX is more effective than MTX alone in treatment of psoriasis vulgaris.

Platelet-rich Plasma and Its Application in Clinical Trial

Platelet-rich Plasma and Its Application in Clinical Trial

Intralesional platelet-rich plasma injection promotes tongue regeneration following partial glossectomy in a murine model

BackgroundWe examined the regenerative efficacy of the activated platelet-rich plasma (PRP) concentrate administered by local injection in an animal model mimicking partial glossectomy for tongue cancer. MethodsFour-week-old mice were randomized to four groups; (1) a treatment-naïve control group, (2) a PRP group, (3) a hemiglossectomy group, and (4) a hemiglossectomy + PRP group. The activated PRP concentrate was injected into the deep layer of resected surfaces of mouse tongues immediately after excision, and tongue widths and lengths were measured on postoperative days (POD) 5 and 12. Gross tongue morphologies and microscopic findings were investigated. Inflammation and fibrous tissue areas were also measured, and immunohistochemical analysis was performed for c-kit, neurofilament, and S-100. ResultsThe activated PRP concentrate reduced wound scar contracture, promoted wound healing, and reduced inflammation and wound fibrosis. On POD 12, histologic findings in the hemiglossectomy + PRP group were similar to those in the normal control group, and the intensity of stem cell factor receptor c-kit expression was also significantly greater in the PRP group than in the hemiglossectomy group on POD 12. Immunohistochemical staining revealed S100 and neurofilament expressions in the hemiglossectomy + PRP group were significantly more intense than in the hemiglossectomy group. ConclusionIntralesional activated PRP concentrate injection has potential use for tongue regeneration, wound healing, and neural regeneration with minimal scarring after partial glossectomy.