Candidiasis is a common fungal infection, with Candida tropicalis infections being relatively rare. These infections develop into skin fungal infections under conditions such as broad-spectrum antibiotic use, diabetes, and immunosuppression. Traditionally, antifungal drugs have been the primary treatment; however, issues like hepatotoxicity and the need for long-term use persist. Consequently, new treatment approaches are essential. Most previous reports have focused on Candida albicans, with fewer addressing Candida tropicalis. This study reports a case where a patient with a skin Candida tropicalis infection was treated with a combination of surgery and ALA photodynamic therapy(635 nm, 120 J/cm2, 177 mW/cm2). After just one session of this combined treatment, the patient achieved significant clinical remission. Therefore, the combination of surgery and ALA-PDT may offer a safe and effective treatment option.

Verrucae vulgaris are highly contagious keratotic lesions occurring on the skin caused by human papillomavirus. Generally, verrucae vulgaris are harmless to the body, but when they occur in specific areas such as the face or soles of the feet, they can profoundly impact an individual\'s quality of life and necessitate therapeutic intervention. Although several pharmacological and physical topical treatments are available, the results are often unsatisfactory in terms of efficacy and cosmetic outcome. Verrucae which typically occur widely on the face are usually Verrucae Planae. When Verrucae vulgaris does occur, it usually presents as single or occasional multiple lesions, rather than covering almost the entire face. In immunocompromised situations, verruca vulgaris can exhibit rare proliferative behavior. In this report, we present a 17-year-old male adolescent who was successfully treated for generalized facial verrucae vulgaris by using a combination of curettage and photodynamic therapy (PDT). The patient\'s prolonged use of topical corticosteroids and tacrolimus ointment on the face for eczema over several years is believed to have led to a localized immunosuppressive state of the facial skin, which is considered a significant factor in the outbreak of verrucae vulgaris. Additionally, the patient has a history of acne and frequently scratched face. The appearance of the Koebner phenomenon following scratching is considered another potential reason. This treatment achieved complete resolution and improved the patient\'s pre-existing acne problem, resulting in a satisfactory cosmetic outcome without any notable adverse effects or recurrence during the follow-up period. This highlighted that pre-treatment with curettage before PDT enhanced the efficiency of verrucae vulgaris treatment and reduced the cost.

Genetic sequencing has revolutionized immunotherapy in colorectal cancer (CRC). Recent clinical trials have revealed a positive response to immunotherapy-based systemic therapies in CRC patient subgroups with microsatellite instability (MSI)-High or DNA polymerase epsilon (POLE) mutation. However, the unsatisfactory response rates was the major limitation in real-world practice of the precision immunotherapy in CRC. Adding photodynamic therapy (PDT) to systemic immunotherapy has showed synergetic anti-tumor effect by modulating tumor microenvironment, while the eligible patient\'s subgroups which would benefit from this combination remained equivocal. Here we reported a synchronous colorectal cancer patient with MSI-High and POLE mutation who had accelerated response in less than 2 cycles (42 days) of immunotherapy-based systemic therapies after tumor-directed PDT and has remained progression-free by far. This case enlightened the synergetic effect of PDT in immunotherapy-treated CRC patients, with the MSI and POLE-mutation status as predictors of survival benefits.

UNASSIGNED: To evaluate the efficacy of Mohs micrographic surgery (MMS) combined with photodynamic therapy (PDT) in treating non-invasive extramammary Paget\'s disease (EMPD).
UNASSIGNED: A 77-year-old male patient with non-invasive EMPD was treated with MMS followed by PDT. Preoperative fluorescence localization using 5-aminolevulinic acid (ALA) was performed to determine the surgical scope. MMS was conducted under lumbar anesthesia with intraoperative frozen-section pathology. Postoperative PDT was administered weekly for three sessions.
UNASSIGNED: The patient achieved negative surgical margins after two rounds of intraoperative pathology. Postoperative follow-up over two years showed no recurrence, and the patient did not experience significant adverse reactions.
UNASSIGNED: The combination of MMS and PDT was effective in treating non-invasive EMPD, demonstrating favorable clinical outcomes and no recurrence over the two-year follow-up period.

Perifolliculitis capitis abscedens et suffodiens, also known as dissecting cellulitis of the scalp, is a rare, chronic suppurative, inflammatory head hair follicle disease, which seriously affects the patient\'s quality of life. Clearly, clinical treatment varies widely and is somewhat challenging. We report a case of a 19-year-old male patient who had good results through surgery combined with photodynamic therapy. Surgery combined with photodynamic therapy for perifolliculitis capitis abscedens et suffodiens is effective and safe, especially for patients with poor responses to previous traditional treatments.

Severe acne, characterized by cysts and nodules, can significantly impact a patient\'s self-image and quality of life [1]. In China, first-line treatments for severe acne typically include oral isotretinoin, topical benzoyl peroxide, and oral or topical antibiotics [2]. However, due to concerns about safety, oral isotretinoin and antibiotics are not recommended for lactating women, posing challenges in treating acne in this population and often leading to emotional distress. While photodynamic therapy has shown effectiveness in patients unwilling to take oral medications [3], treating severe acne during lactation remains a complex issue with limited research available. In this unique case, fire needle combined with photodynamic therapy was successfully utilized to address severe acne in a lactating patient. Following treatment, the patient experienced clearance of cysts, nodules, and pustules, as well as an improvement in depressive symptoms, yielding significant outcomes. Nevertheless, the efficacy and safety of this combined approach warrant further investigation through clinical trials.

A choroidal osteoma (CO) is a relatively rare, benign tumor with ossification that develops in the choroid and undergoes enlargement and decalcification in its natural course. Photodynamic therapy (PDT) is used to induce decalcification, but there are few reports on individual cases treated with PDT. A 47-year-old Japanese man who had reduced decimal visual acuity (VA) of the right eye to 0.7 due to a CO away from the fovea was treated with PDT. The PDT resulted in a partial decalcification of CO, and the visual acuity improved to 1.0. However, the tumor slowly expanded, eventually reaching the central fovea. Decalcification and focal choroidal excavation occurred during this natural course of the disease. Although his metamorphopsia worsened, his VA was maintained at 1.0. This case highlights that a CO partially decalcified after PDT can still enlarge and decalcify over several years. These findings indicate the need for careful and continuous monitoring of eyes with a CO.

Background: Intentional replantation (IR) is an emerging and cost-effective last-resort treatment for persistent apical periodontitis. Adjunctive phototherapy for IR aims to improve the management of challenging cases by enhancing disinfection, stimulating healing and promoting regeneration. Objective: We report a novel phototherapy-assisted IR protocol conducted on a compromised lateral incisor with an extensive periapical infection (Ø > 10 mm) in a 68-year-old diabetic male. Methods: The IR protocol involved pre- and postoperative photobiomodulation (660 nm, 0.2 J/cm2, 60 sec/site), antimicrobial photodynamic therapy of the root surface (660 nm, 0.6 J/cm2, 30 sec, methylene blue photosensitizer), and Er:YAG root and socket debridement (2940 nm, 21 J/cm2, 30 sec). The total time from extraction to replantation was 14 min 35 sec. Results: The tooth at 3.5-year follow-up remained clinically functional with radiographic resolution of the infection indicating a successful reimplantation. Conclusions: This case report demonstrated that an adjunctive phototherapy IR protocol can effectively treat a compromised tooth with extensive periapical infection.

UNASSIGNED: Photodynamic therapy (PDT) has shown substantial benefit in the treatment of choroidal hemangioma (CH) in recent years. This report describes the use of PDT with overlapping spots in a patient with Sturge-Weber syndrome (SWS) and large circumscribed CH.
UNASSIGNED: A 9-year-old girl with SWS and a history of glaucoma in her left eye was referred to a retina clinic for possible macular changes. Examination revealed decreased vision in the left eye, pigmentary changes in the macula, and choroidal thickening in the posterior pole. After being lost to follow-up for 2 years, the patient returned with further vision deterioration with best-corrected visual acuity (BCVA) of 20/150 and new subretinal fluid (SRF). Imaging findings were consistent with a diagnosis of CH and SRF. PDT with verteporfin was initiated on the entire area with multiple overlapping spots, resulting in resolution of SRF and improvement in visual acuity and choroidal contour. At 18-month post-treatment, the patient\'s BCVA was 20/25 with no recurrence of SRF or increased choroidal thickening. Significant pigmentary changes and subretinal hyper-reflective material were observed in the OCT of the treated area.
UNASSIGNED: Multiple overlapping laser spots of PDT can result in longstanding regression of large circumscribed CH in a patient with SWS with excellent final visual acuity. However, significant subretinal changes may also result following this method of treatment.

Intraductal papillary mucinous neoplasm of the bile tract is a rare biliary tumor characterized by mucin growth within the bile duct. In the early stages, it often presents without significant obstruction, this often leads to its discovery in the advanced stages. We report a case of a 63-year-old female with an intraductal papillary mucinous neoplasm of the bile duct (IPMN-B). The patient had a history of intrahepatic bile duct stones and biliary ascariasis. She gradually developed symptoms such as jaundice and intermittent fever before admission, and a bile duct biopsy confirmed the diagnosis of IPMN-B. Currently, endoscopic photodynamic therapy (PDT) is considered an effective treatment for bile duct cancer. In this case, we performed two sessions of PDT guided by SpyGlass. The patient experienced complete remission postoperatively, and there has been no evidence of tumor recurrence or metastasis in the three years following the procedure.