Bowens Disease

Following initiation of standard chemotherapy agents, carboplatin and paclitaxel, the patient developed a diffuse, itchy rash over her abdomen, back, and bilateral upper and lower extremities. Biopsy of the rash revealed a diffuse non-resectable cutaneous squamous cell skin carcinoma (cSCC) in situ. Consequently, a PD1-inhibitor was added to her neoadjuvant chemotherapy regimen, which resulted in complete response to both metastatic ovarian and diffuse cSCC in situ at time of surgery.

Clinically, a significant decrease in PZP in AK and SCC in situ samples was observed, while a rebound appeared in the invasive SCC samples. Collectively, our findings reveal the effective role of hucMSC-sEVs in regulating PZP to combat photoaging and provide new pre-clinical evidence for the potential development of hucMSC-sEVs as an effective skin photoprotective agent.

The findings underscore the need for comprehensive diagnostic evaluation when encountering complex or atypical skin lesions. This report emphasizes the rarity of subcutaneous MCC coexisting with BD and underscores the importance of comprehensive diagnostic assessment in unusual cases. Further research is warranted to better understand the underlying mechanisms and to guide optimal management strategies for such rare and challenging presentations.

When SCC was diagnosed, it was often hypo-differentiated and required more attention. Immunostaining for ADP and AR is invaluable for confirming SGC diagnosis.

Pagetoid squamous cell carcinoma in-situ is one of the rare entities with subtle clinical presentation and endoscopic findings. Evaluation of this case signifies the importance of taking biopsies in the lesions which shows minimal mucosal change in the endoscopy.

P2, N=20, Recruiting, The Center for Clinical and Cosmetic Research

P2, N=32, Active, not recruiting, The Center for Clinical and Cosmetic Research | Recruiting --> Active, not recruiting | N=20 --> 32 | Trial completion date: Jun 2024 --> Oct 2024 | Trial primary completion date: Feb 2024 --> Sep 2024

Skin specimens with an exophytic mass histologically resembling cGCT but with malignant cytology should be meticulously evaluated for elements of SCC. Molecular analysis, detecting mutations like H3F3 or HMGA2-NCOR2 fusion, can aid in distinguishing cutaneous sarcomatoid squamous cell carcinoma from GCT bone or GCT soft tissue.

Pigmented SCC is very rare, and most of the literature is focused on pigmented BD (pBD), which is mainly characterized by gray-brown dots in a linear fashion and glomerular vessels without evident scales. In conclusion, pNMSC is rarely encountered on genitals; evaluation with dermoscopy or other ancillary devices like RCM is important both to exclude benign lesions like seborrheic keratosis and lentigo and to rule out melanoma.

P2, N=50, Recruiting, DermBiont, Inc.

P53 immunostain can aid in confirmation of malignancy. Understanding their overlapping pathologic features will help pathologists avoid pitfalls and diagnose these lesions correctly on biopsy specimens.

The immunoreactivity to the investigated markers confirms the multistage skin carcinogenesis, and their involvement starting from the initiation phase of the cancer process. The importance of the studied markers in the evolution and prognosis of precancerous lesions of CSCC is also supported by the linear correlations revealed between the immunoexpressions of P16, Ki67 and the membranous immunoexpression of Beta-catenin in AK.

The study was limited by retrospective study design, small sample size, and no comparison with standard therapy. Combination approach using carbon dioxide laser ablation followed by manual dermabrasion and IL 5-FU injection has been proved to be effective, efficient and safe with good functional, oncological and aesthetic outcomes in treating BD.

The expression of E-cadherin was increased, while the expression of snail, β-catenin, p-AKT, p-S6 and p-4EBP1were decreased. Conclusion YAP is highly expressed in cSCC tissues, and promotes the cell migration and invasion of cSCC cells by activating the PI3K/AKT signaling pathway and EMT.

P2, N=44, Completed, Sirnaomics | Active, not recruiting --> Completed | N=100 --> 44

P1/2, N=9, Completed, Sirnaomics | Active, not recruiting --> Completed | N=30 --> 9 | Trial completion date: Jul 2023 --> Mar 2023 | Trial primary completion date: Jul 2023 --> Mar 2023

The 5-year relative survival rates steadily increased in extramammary Paget's disease (23.6%), cutaneous B-cell lymphoma (21.3%), mycosis fungoides (20.2%), extranodal NK/T-cell lymphoma, nasal type (18.1%), and malignant melanoma (16.1%) from 1996-2000 to 2015-2019. Most primary cutaneous malignancies have increased in incidence and survival rates in the Korean population, but to varying extents depending on the type of skin cancer.

Our findings suggest the oncogenic role of sexually transmitted and genito-digitally transmitted α-HPVs in pathogenesis of BD in the pelvic and digital regions.

In addition, RGR expression was inversely correlated with involucrin expression and positively correlated with proliferating cell nuclear antigen (PCNA) and Ki67 expression. Furthermore, RGR regulates SCC cell differentiation through the PI3K-Akt signalling pathway, as determined using molecular biology approaches in vitro, suggesting that high expression of RGR is associated with aberrant proliferation and differentiation in SCC.

Over-expression of the proto-oncogene, Myc, has been observed in poor responders, whilst the tumour suppressor gene, PTEN, showed under-expression. The potential for use and methods of delivery of topical PDT for dermatological indications continue to expand the enhanced choice of treatment offered to patients.

This report underscores the importance of considering sebaceous carcinoma in situ in diagnosis in atypical locations, emphasizing the need for a comprehensive histopathologic examination and immunohistochemical staining panel. This article aims to demonstrate the rarity of sebaceous carcinoma in situ in extraocular sites to broaden our understanding of its diverse clinical presentations.

P2, N=25, Recruiting, Jonsson Comprehensive Cancer Center | Trial completion date: Jan 2025 --> Jan 2026 | Trial primary completion date: Jan 2024 --> Jan 2025

P2/3, N=200, Recruiting, Boston University

The study identifies distinct differences in the presence of amorphous masses and the expression levels of p53, Bcl-2, and CD31 between sun-exposed skin and in situ cutaneous squamous cell carcinomas, including actinic keratoses.

P2, N=20, Recruiting, The Center for Clinical and Cosmetic Research

After complete excision, no recurrence has been observed for 5 months. The findings of the present case expand the histological spectrum of cutaneous adnexal tumors with follicular immunophenotypic differentiation.

P1, N=13, Active, not recruiting, National Cancer Institute (NCI) | Trial completion date: Nov 2023 --> Nov 2024

Our study reveals a previously unrecognized role for exon 2 of PVT1 in its oncogenic role and that PVT1 suppresses cellular senescence in cSCC. PVT1 may be a biomarker and therapeutic target in cSCC.

Eyelid lesions in patients aged 76 or older are more likely to be malignant. Ophthalmology eyelid specimens in younger patients are more commonly benign and related to inflammation. Specimens from the plastics department are more commonly malignant, related to UV-exposure, and are from older patients. This difference may be due to a misconception that plastic surgeons have more eyelid cancer reconstruction experience than oculoplastic surgeons, or less awareness of the oculoplastic expertise available today.

Our whole population cohort survival study examining the Icelandic Cancer Registry supports prior studies demonstrating that BCC is not associated with a reduction in relative survival and that SCC and SCCis are associated with comparatively poor relative survival in certain population subgroups.

Local chemotherapy, such as imiquimod and 5-fluorouracil, may be used for eyelid squamous cell carcinoma in situ. When surgery or radiotherapy is not recommended for distant metastases or locally advanced disease, drug therapy is often according to head and neck squamous cell carcinoma in Japan. The treatment often requires a multidisciplinary team to ensure the preservation of function and cosmetic appearance.

Molecular analysis may also be helpful as H3F3 mutation or HMGA2-NCOR2 fusion would be evidence of GCT bone or GCT soft tissue rather than cSSCC. Poster type: Poster Defense

These findings are cSCC-specific and could not be recapitulated in basal cell carcinomas. Our study provides important insights into the potential origin and functionalities of dermal CAFs that will be highly beneficial for the specific targeting of the cSCC microenvironment.

ET combined with PDT is effective in the treatment of BD with large patches and has the advantages of fast healing, less scar formation, and a good cosmetic effect.

For MAL-PDT non-inferiority to excision cannot be concluded. Therefore, 5-fluorouracil should be preferred over excision and MAL-PDT in treatment of Bowen's disease.

The decreased or loss of expression of CD138 and E-cadherin might be correlated with tumor invasion and progression to cervical invasive SCC. In both of our cases, CD138 and membranous E-cadherin were strongly expressed in tumor cells, suggesting a role in the pathogenesis of superficial spreading cervical SCC to endometrium (Figure 2.77, C, D).

These results indicate that PDPN-positive cells include tumor cells with cancer stem cell properties. Although the precise mechanism through which PDPN expression is involved in the pathogenesis of Bowen disease needs to be determined, PDPN may be a novel druggable target for Bowen disease.

TRPS1 immunoexpression was observed in several skin appendages and cutaneous tumors.

Electrodesiccation and curettage allows for a high 5-year cure rate across a broad range of anatomic sites. However, overall cure rate should be individualized by anatomic location when counseling patients.