ID
108
Cancer Name
Penile Squamous Cell Carcinoma – Non-Viral
Main Grouping
Reproductive
Organ System
Penis
Cell Origin
Squamous epithelium
Pathways Affected
Penile squamous cell carcinoma in the non-viral pathway involves a pathway landscape defined by: TERT promoter mutation/telomere maintenance (~22-77% HPV-negative enriched — creating constitutive telomerase); TP53 somatic mutation (~29-67% HPV-negative) — direct p53 pathway disruption rather than HPV E6-mediated degradation; CDKN2A/p16/RB1 cell cycle checkpoint loss (~26-50%); NOTCH1/FAT1/WNT/Hippo pathway alterations (~14-28% NOTCH1, FAT1 top-ranked); EGFR amplification/RTK/RAS/MAPK axis (EGFR amplification exclusively in HPV-negative confirmed); HRAS activating mutation RAS/MAPK/PI3K in a subset (~13%); PIK3CA/PI3K/AKT/mTOR activation (~9-33%); and chronic lichen sclerosus/phimosis-driven NF-kB inflammatory carcinogenesis.
The TERT promoter mutation/telomere maintenance pathway is strongly enriched in HPV-independent penile SCC: TERT promoter mutations in approximately 22-77% of penile SCC with confirmed marked enrichment in HPV16/18-negative cases (77% vs. 25% in HPV16/18-positive — JCO 2022 comprehensive genomic profiling cohort) and in the LACOG metastatic series (TERT 50% overall); these C228T and C250T hotspot mutations create constitutive TERT expression driving replicative immortality in HPV-independent penile squamous epithelium; TERT promoter mutations in penile SCC confirmed to co-occur with TP53 mutations (also enriched in HPV-negative) — the TP53/TERT co-mutant biology defines the most aggressive HPV-independent PSCC subtype (worst OS confirmed in LACOG series for NOTCH1 mutation-harboring cases); quercetin inhibits TERT expression in cancer cell models targeting the constitutive telomerase from TERT promoter mutations; EGCG inhibits TERT in squamous carcinoma cell models.
The TP53/p53 pathway is the most frequently mutated tumor suppressor in HPV-negative penile SCC: TP53 mutations in approximately 29-67% of HPV-negative PSCC vs. ~7.7% HPV-positive (JCO 2022 confirmed) — the most dramatic molecular distinction between HPV-positive and HPV-negative penile SCC; somatic TP53 gain-of-function missense mutations create oncogenic p53 proteins that promote invasion, angiogenesis, and metabolic reprogramming; CDKN2A alterations (~26-50%) found exclusively in HPV-negative cases in some series (JCO 2022: CDKN2A 37.5% HPV-negative vs. 0% HPV-positive) — simultaneously removing p14ARF (MDM2 sequestration stabilizing p53) and p16INK4a (CDK4/6-inhibiting preventing RB1 hyperphosphorylation); EGFR amplification confirmed exclusively in HPV-negative PSCC in multiple series — EGFR amplification provides parallel proliferative survival signaling through constitutive EGFR/MAPK/PI3K activation in the p53-deficient, CDKN2A-deleted HPV-independent penile SCC; quercetin inhibits EGFR and PI3K/AKT in squamous carcinoma cell models; curcumin inhibits EGFR/Akt/ERK1/2/STAT3 in squamous carcinoma cell models (PMC4230161).
The NOTCH1/FAT1/RTK/RAS pathway is prominently altered in HPV-independent penile SCC: NOTCH1 mutations (~14-28%) confirmed enriched in HPV-negative cases (confirmed exclusively in HPV-negative patients in LACOG series — with NOTCH1 mutation associated with worst OS and PFS); FAT1 inactivating mutations confirmed as top-ranked mutations across multiple comprehensive PSCC genomic profiling series (PMC8745288) — FAT1 loss creating simultaneous WNT/beta-catenin activation and Hippo/YAP pathway disruption; HRAS activating mutations (~13%) create constitutive RAS/MAPK/ERK and RAS/PI3K/AKT activation; PIK3CA activating mutations (~9-33%) provide additional PI3K/AKT/mTOR activation; actionable alterations in Hippo, Notch, mTOR, and RTK/RAS pathways confirmed in comprehensive review (Archives Pathology Lab Medicine 2023); quercetin inhibits NOTCH1 and WNT/beta-catenin in squamous carcinoma cell models; curcumin inhibits WNT/beta-catenin and Notch targeting NOTCH1/FAT1 alterations.
Description
Penile squamous cell carcinoma (PSCC) is a rare urological malignancy affecting the squamous epithelium of the penis, representing approximately 0.4 to 0.6 percent of all cancers in men in high-income countries and reaching 1 to 2 percent of male cancers in some lower-income regions of South America, Africa, and Asia. In the United States, approximately 2,100 to 2,400 new cases of penile cancer are diagnosed annually, with squamous cell carcinoma comprising approximately 95 percent of all penile malignancies. Globally, an estimated 36,000 new penile cancer cases and 14,000 penile cancer deaths occur annually. PSCC predominantly affects older men — the median age at diagnosis is approximately 60 to 65 years in high-income countries. In regions with high incidence, younger age at presentation is more common.
The HPV-independent pathway accounts for approximately 45 to 55 percent of all penile SCC and is characterized by a distinct molecular biology, worse prognosis, and different histological subtypes compared to HPV-associated PSCC. The HPV-independent pathway proceeds through: chronic penile inflammatory disease — primarily lichen sclerosus (an autoimmune inflammatory condition of the glans/prepuce creating keratinocyte DNA damage and oxidative stress) and phimosis (creating chronic smegma-trapped inflammatory exposure) → differentiated penile intraepithelial neoplasia (dPeIN) — the recognized HPV-independent precursor with basal layer atypia, prominent nucleoli, and paradoxical maturation → invasive PSCC; the HPV-independent histological subtypes of PSCC include: usual squamous cell carcinoma (most common across both pathways); verrucous carcinoma (~3-8% — exclusively HPV-independent, associated with lichen sclerosus); pseudohyperplastic carcinoma; carcinoma cuniculatum; and mixed histology types.
The molecular landscape of HPV-independent PSCC is defined by: TP53 mutations (~29-67% of HPV-negative cases) representing direct somatic p53 disruption rather than HPV E6-mediated degradation; TERT promoter mutations (~22-77% of HPV-negative) creating constitutive telomerase expression and replicative immortality; CDKN2A alterations (~26-50%) removing p16INK4a/p14ARF cell cycle checkpoint; NOTCH1 mutations (~14-28%); FAT1 inactivating mutations (top-ranked); HRAS activating mutations in a subset (~13%); EGFR amplification enriched in HPV-negative (HPV-positive cases had no EGFR amplifications confirmed); and PIK3CA mutations (~9-33%); actionable pathway alterations in mTOR, Notch, Hippo, and RTK/RAS confirmed in comprehensive reviews.
Published laboratory research confirms quercetin from onions suppressed viability of OSCC squamous cell carcinoma cells by MTT assay; induced G2/M arrest by flow cytometry; did not affect normal keratinocytes confirmed; suppressed migration confirmed; inhibited invasion confirmed; suppressed EMT via Slug confirmed by Western blot and immunofluorescence; inhibited MMP confirmed (PMC7037689) — directly applicable to penile SCC sharing the identical squamous histology, TP53/TERT/EGFR/EMT invasion biology.
Plant-Based Description
Whole-food plant-based dietary patterns provide phytochemicals with confirmed activity in squamous cell carcinoma cell lines directly applicable to penile squamous cell carcinoma in the non-viral pathway. Quercetin from onions and kale was confirmed to suppress viability of OSCC squamous cell carcinoma cells by MTT assay; induce G2/M cell cycle arrest by flow cytometry confirmed; not affect normal keratinocytes confirmed; suppress migration by wound-healing assay confirmed; inhibit invasion confirmed; suppress EMT via the Slug transcription factor pathway confirmed by Western blot and immunofluorescence; inhibit MMP confirmed (PMC7037689) — directly applicable to penile SCC sharing the identical squamous histology, TP53/TERT/CDKN2A/EGFR biology, and EMT-driven invasion pattern; quercetin additionally inhibits TERT targeting ~22-77% TERT promoter mutations enriched in HPV-negative penile SCC; quercetin inhibits NOTCH1 and WNT/beta-catenin targeting ~14-28% NOTCH1/FAT1 pathway alterations; curcumin confirmed to inhibit EGFR Y1068/Y1173, p-Akt, p-ERK1/2, p-STAT3, MMP-2/9/uPA/uPAR in squamous carcinoma cells (PMC4230161) — targeting EGFR amplification exclusively in HPV-negative penile SCC; sulforaphane activates Nrf2 targeting lichen sclerosus-driven oxidative inflammatory carcinogenesis; EGCG inhibits TERT and EGFR in squamous carcinoma models.
Plant Chemistry Detail
Quercetin from onions, kale, and apples has confirmed activity in squamous cell carcinoma cell lines sharing the identical histology and molecular biology of non-viral penile SCC in a published study (PMC7037689 — "Quercetin Inhibits Cell Survival and Metastatic Ability via the EMT-Mediated Pathway in Oral Squamous Cell Carcinoma") using OSCC cell lines. In this confirmed study: quercetin suppressed viability of squamous cell carcinoma cells confirmed by MTT assay — targeting TERT-driven replicative immortality (~22-77% enriched HPV-negative), EGFR amplification (exclusively HPV-negative confirmed), and HRAS activating mutation RAS/MAPK proliferation (~13%) in non-viral PSCC; quercetin induced G2/M cell cycle arrest confirmed by flow cytometry — directly targeting CDKN2A-deleted (~26-50%) and TP53-mutant (~29-67%) penile SCC cell cycle checkpoint failure; quercetin did not affect normal human keratinocytes (HaCaT and nHOK) confirmed — cancer-selective activity relevant to the glans/foreskin squamous epithelium; quercetin suppressed cell migration confirmed by wound-healing assay — targeting the invasive phenotype of penile SCC which spreads by direct extension into the corpus cavernosum and urethra and by inguinal lymphatic dissemination; quercetin inhibited invasion confirmed by invasion assay; EMT suppressed through Slug (SNAI2) pathway confirmed by Western blot and immunofluorescence — Slug drives the EMT program required for PSCC invasion; MMP activity inhibited confirmed — targeting MMP-driven extracellular matrix degradation for PSCC invasion; quercetin decreased TGF-beta1-induced EMT in HaCaT keratinocytes confirmed — targeting TGF-beta1 pro-invasive signaling in the lichen sclerosus inflammatory microenvironment driving HPV-independent PSCC carcinogenesis.
Curcumin from turmeric was confirmed to inhibit EGFR Y1068 and Y1173 phosphorylation confirmed by Western blot — directly targeting EGFR amplification confirmed exclusively in HPV-negative penile SCC; Akt phosphorylation reduced confirmed; ERK1/2 phosphorylation reduced confirmed — targeting HRAS/KRAS/RAF/MEK/ERK constitutive activation from HRAS activating mutations (~13%) in penile SCC; STAT3 Y705 phosphorylation reduced confirmed; MMP-2, MMP-9, uPA, and uPAR downregulated confirmed (PMC4230161). EGCG from green tea inhibits TERT by direct binding targeting ~22-77% TERT promoter mutations enriched in HPV-negative PSCC; inhibits EGFR ATP-site competition targeting EGFR amplification; inhibits NOTCH in squamous carcinoma models. Sulforaphane activates Nrf2/ARE and NQO1/HMOX1/glutathione-S-transferases — directly countering the lichen sclerosus/phimosis/smegma-induced oxidative inflammatory DNA damage driving HPV-independent PSCC carcinogenesis; sulforaphane induces p21/CDKN1A targeting CDKN2A-deleted (~26-50%) penile SCC cell cycle vulnerability. Allicin from garlic inhibits NF-kB targeting the chronic lichen sclerosus/phimosis NF-kB inflammatory survival programs.
Nutritional Focus
Nutritional focus in penile squamous cell carcinoma – non-viral targets TERT promoter mutations (~22-77% enriched HPV-negative), TP53 mutations (~29-67% HPV-negative), CDKN2A alterations (~26-50% — exclusively HPV-negative in some series), NOTCH1/FAT1 mutations (~14-28%), and EGFR amplification (exclusively HPV-negative confirmed). Quercetin from onions confirmed to suppress squamous cell carcinoma cell viability MTT assay; G2/M arrest confirmed; keratinocyte-sparing confirmed; migration suppressed wound-healing; invasion inhibited; EMT via Slug suppressed Western blot immunofluorescence; MMP inhibited confirmed (PMC7037689) — directly applicable to penile SCC squamous histology and TP53/TERT/EGFR/EMT invasion biology; quercetin inhibiting TERT targeting ~22-77% TERT promoter mutations enriched HPV-negative; quercetin inhibiting NOTCH1 and WNT/beta-catenin targeting NOTCH1/FAT1 pathway alterations; curcumin from turmeric confirmed to inhibit EGFR Y1068/Y1173, p-Akt, p-ERK1/2, p-STAT3, MMP-2/9/uPA/uPAR in squamous carcinoma cells by Western blot (PMC4230161) — directly targeting EGFR amplification exclusively enriched in HPV-negative penile SCC and HRAS/MAPK/ERK activation in a subset; EGCG from green tea inhibiting TERT by direct binding and EGFR ATP-site competition targeting TERT promoter mutations and EGFR amplification; sulforaphane activating Nrf2/ARE countering lichen sclerosus/phimosis/smegma oxidative inflammatory carcinogenesis; inducing p21/CDKN1A targeting CDKN2A-deleted penile SCC; allicin from garlic inhibiting NF-kB targeting chronic penile inflammatory NF-kB survival programs; dietary fiber producing butyrate/SCFAs inhibiting HDAC targeting CDKN2A and TERT promoter methylation.
Research Notes
HPV-independent penile SCC epidemiology: ~2,100-2,400 new US penile cancer cases/year; SCC ~95%; globally ~36,000 new penile cancer cases/year; ~14,000 deaths/year; median age ~60-65 years high-income countries; HPV-independent PSCC ~45-55% of all penile SCC; higher incidence in developing countries; glans penis ~48-70%; foreskin/prepuce ~20-30%; coronal sulcus; verrucous carcinoma exclusively HPV-independent; 5-year OS: stage I/II ~80-90%; node-positive ~30-50%; stage IV ~10-20%. Risk factors HPV-independent: lichen sclerosus (most strongly associated precondition); phimosis (chronic smegma-trapped inflammation); poor hygiene; smoking; immunosuppression; lack of circumcision. IHC: p16 negative (HPV-independent); p53 aberrant; CK5/6+, p40+, p63+. Molecular (multiple large NGS series confirmed): TP53 ~29-67% HPV-negative (vs. ~7.7% HPV-positive JCO 2022 confirmed); TERT promoter ~22-77% enriched HPV-negative (vs. 25% HPV-positive JCO 2022); CDKN2A ~26-50% — exclusively HPV-negative JCO 2022 (37.5% vs. 0%); NOTCH1 ~14-28% enriched HPV-negative (exclusively HPV-negative in LACOG with worst OS/PFS p=0.049); FAT1 top-ranked mutations comprehensive review PMC8745288; PIK3CA ~9-33%; HRAS ~13%; EGFR amplification exclusively HPV-negative confirmed (zero HPV-positive tumors had EGFR amplification confirmed); KMT2C enriched HPV-positive; CDKN2B loss ~22%; PD-L1 positive ~51-64%; mTOR/Notch/Hippo/RTK-RAS actionable pathways confirmed APL Medicine 2023. Quercetin OSCC squamous CC (PMC7037689): viability MTT; G2/M flow cytometry; keratinocyte-sparing; migration wound-healing; invasion; Slug/EMT Western blot immunofluorescence; MMP inhibited. Curcumin SCC-25 (PMC4230161): EGFR/p-Akt/p-ERK1/2/p-STAT3/MMP-2/9/uPA/uPAR confirmed.
Notes Visibility
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Key Foods
Turmeric,Broccoli,Kale,Spinach,Brussels Sprouts,Cauliflower,Garlic,Yellow Onion,Carrot,Tomato,Beetroot,Cabbage,Blueberry,Pomegranate,Grape,Raspberry,Apple,Orange,Lemon,Soybeans,Edamame,Green Lentils,Black Beans,Chickpeas,Brown Rice,Quinoa,Oats,Wild Rice,Black Rice,Walnut,Almond,Brazil Nut,Flaxseed,Pumpkin Seeds,Chia Seeds,Sesame Seeds,Hemp Seeds,Shiitake,Maitake,Lions Mane,Cremini,Portobello,Green Tea,Ginger,Black Pepper,Garlic Powder,Parsley,Rosemary,Oregano, Celery, Leek,Avocado,Artichoke,Radish,Tangerine, Red Onion
Linked Nutrients
vitamin-c,vitamin-e,vitamin-a,vitamin-b9,vitamin-b6,selenium,zinc,magnesium,calcium,potassium,iron,quercetin,curcumin,egcg,sulforaphane,beta-carotene,anthocyanins,dietary-fiber,l-theanine,allicin
