Squamous cell carcinoma (SCC) of the oral cavity and pharynx represents the sixth most common form of malignancy worldwide. A significant proportion of these cases are related to human papillomavirus (HPV) infection. In general, HPV-associated SCC is more commonly nonkeratinizing and poorly differentiated, whereas non-HPV-associated SCC is typically keratinizing and moderately differentiated. N...

BACKGROUND The PTCH expression level in esophageal squamous cell carcinoma (SCC) was examined. MATERIALS AND METHODS To test whether PTCH can serve as a candidate marker for esophageal SCC, a quantitative reverse transcription (RT) -PCR for the PTCH gene was performed and the possible relationship between PTCH gene expression levels and clinicopathological findings in esophageal SCC was evalu...

Sister chromatid cohesion (SCC), which is established during DNA replication, ensures genome stability. Establishment of SCC is inhibited in G2. However, this inhibition is relived and SCC is established as a response to DNA damage, a process known as Damage Induced Cohesion (DIC). In yeast, Chk1, which is a kinase that functions in DNA damage signal transduction, is considered an activator of ...

HLP: hypertrophic lichen planus LP: lichen planus PEH: pseudoepitheliomatous hyperplasia SCC: squamous cell carcinoma INTRODUCTION Hypertrophic lichen planus (HLP) and squamous cell carcinoma (SCC) share many clinical and histopathologic characteristics, making them difficult to distinguish. HLP may undergo malignant transformation, leading to the development of SCC within HLP. We present a cas...

BACKGROUND The purpose of this study was to evaluate the clinicopathologic features and prognosis of signet ring cell carcinoma (SCC) and non-SCC mucinous adenocarcinoma (MC) and to compare them with those of nonmucinous adenocarcinoma (NMC) of the colon. METHODS From January 1995 to December 2003, 45 patients with SCC and 332 with MC were identified from prospectively collected medical recor...

INTRODUCTION Some head and neck squamous cell carcinomas (HNSCC) have a distinct aetiology, which depends on the presence of oncogenic human papilloma virus (HPV). Also, HNSCC contains cancer stem cells (CSCs) that have greater radioresistance and capacity to change replication dynamics in response to irradiation compared to non-clonogenic cells. Since there is limited data on CSCs in HNSCC as ...

OBJECTIVE To explore the effect of Ki-67 and vascular endothelial growth factor A (VEGF-A) expression on the risks of advanced T category (T3,4) and positive lymph node involvement (N+) in oral and pharyngeal squamous cell carcinoma (SCC) compared with laryngeal SCC. DESIGN Immunohistochemical analysis of prospectively recruited patients. SETTING University-affiliated hospital. PATIENTS A...

Squamous Cell Carcinoma (SCC) is a type of non-melanoma skin cancer prevalent in immune-suppressed transplant recipients and older individuals with a history of chronic sun-exposure. SCC itself is believed to be a late-stage manifestation that can develop from premalignant lesions including Intraepidermal Carcinoma (IEC). Notably, while SCC regression is rare, IEC typically regresses in respons...

Keratinocyte growth factor (KGF, fibroblast growth factor-7) is a fibroblast-derived mitogen, which stimulates proliferation of epithelial cells. The expression of KGF by dermal fibroblasts is induced following injury and it promotes wound repair. However, the role of KGF in cutaneous carcinogenesis and cancer progression is not known. We have examined the role of KGF in progression of squamous...

This paper describes two patients with squamous cell carcinoma (SCC) of the periocular and periorbital skin who presented with trigeminal neuralgia. Both patients had previous cutaneous SCC of the scalp treated successfully with surgical resection but later presented with neuro-ophthalmic findings suggesting perineural invasion (PNI) of SCC. PNI of SCC in the periocular skin or orbit can lead t...