Benign Tumors and Tumor like Conditions (Lecture 2)

Slide 1 · Benign Tumors andTumor-like Conditions

Penile pathology: condyloma acuminatum and Peyronie disease

Condyloma acuminatum • Peyronie disease

Dr Abu Suraih Sakhri

MBBS, MD (Pathology)

www.abusuraihsakhri.com

Slide 2 · Learning objectives

Describe the etiology and distribution of condyloma acuminatum.

Recognize its gross and microscopic structural hallmarks.

Explain the proposed pathogenesis and effects of Peyronie disease.

Distinguish these lesions from adjacent malignant diagnoses.

Slide 3 · Two disorders, two different tissue responses

Condyloma acuminatum

HPV-associated epithelial proliferation

Papillary exophytic lesion

Viral cytopathic change may be seen

Peyronie disease

Reactive connective-tissue fibrosis

Hard plaque near erectile structures

Curvature and intercourse-associated pain

Slide 4 · Why both belong in one teaching unit

“Benign tumors and tumor-like conditions” includes distinct etiologic mechanisms.

Condyloma is a true benign HPV-associated proliferative wart.

Peyronie disease appears reactive rather than neoplastic.

Clinical lesion morphology reflects which tissue compartment is involved.

Slide 5 · Classify the lesion before naming it

Surface epithelium

Papillary wart

Condyloma acuminatum

Fibrous supporting tissue

Collagenous plaque

Peyronie disease

Atypical epithelium

Intraepithelial dysplasia

PeIN: Differential context

Slide 6 · Where penile condylomata commonly arise

External genital / perineal surface

Broader moist mucocutaneous distribution

Coronal sulcus

Frequent penile site

Inner prepuce

Frequent penile site

Schematic

Slide 7 · Benign does not mean identical biology

Benign epithelial wart

Viral association: Low-risk HPV

Epithelial acanthosis/papillomatosis

Preserved maturation

Tumor-like fibrous plaque

Proposed microvascular trauma

Collagen deposition

Not an epithelial wart

Slide 8 · Clinical observation and histology answer different questions

Clinical pattern

Papillary surface lesion or deep hard plaque?

Tissue compartment

Epithelium or penile connective tissue?

Underlying process

Viral epithelial effect or reactive collagen deposition?

Slide 9 · Condyloma acuminatum: A benign genital wart

A sexually transmitted lesion caused by human papillomavirus.

Related to the common cutaneous wart.

Can arise on moist mucocutaneous surfaces of external genitalia in either sex.

Penile morphology is characteristically papillary.

Slide 10 · HPV is the etiologic agent

Human papillomavirus

Infection of genital mucocutaneous epithelium

Epithelial response

Benign squamous thickening and surface projections

Recognizable wart

Condyloma acuminatum

Slide 11 · Low-risk HPV types dominate condyloma

HPV 6

Most frequent type identified in tissue analysis

Described as low risk

Linked to benign genital warts

HPV 11

Less frequent than HPV 6

Also categorized as low risk

Associated with condylomata acuminata

Slide 12 · Transmission is central to classification

Condyloma acuminatum is described as a sexually transmitted wart.

Its viral etiology is important in distinguishing it from a scar-related plaque.

HPV type alone does not substitute for morphologic assessment.

A benign wart and an HPV-associated precursor lesion are different diagnoses.

Slide 13 · Affected mucocutaneous surfaces

The lesion is not restricted to the penile shaft.

It may arise on moist surfaces of the external genitalia.

Perineal lesions also occur.

Anatomic distribution should be documented separately from morphologic diagnosis.

Slide 14 · Penile localization: Coronal sulcus and prepuce

External genital / perineal surface

Broader moist mucocutaneous distribution

Coronal sulcus

Frequent penile site

Inner prepuce

Frequent penile site

Schematic

Slide 15 · Single or multiple lesions can occur

Single lesion

One visible exophytic focus

Does not alter the histologic definition

May be sessile or pedunculated

Multiple lesions

Several papillary excrescences

Shared benign viral pathogenesis

Each may show the same basic architecture

Slide 16 · Gross appearance: Papillary excrescences

Warts form red papillary surface projections.

They are generally several millimeters in diameter in the Robbins description.

Individual excrescences can be sessile or pedunculated.

A papillary surface configuration corresponds to branching stromal cores.

Slide 17 · Sessile versus pedunculated growth

Sessile — broad attachment

Pedunculated — stalk attachment

Schematic

Slide 18 · The low-power diagnostic silhouette

The lesion projects outward rather than forming a deep fibrous plaque.

Branching villous papillae support the elevated squamous epithelium.

Stromal cores are covered by thickened squamous lining.

Papillary projections

Underlying connective tissue

Schematic

Slide 19 · Papillae contain connective-tissue cores

A papilla is not simply a mound of epithelial cells.

Each projection contains an underlying connective-tissue stromal component.

Squamous epithelium covers the branching connective-tissue framework.

Stromal core

Underlying connective tissue

Schematic

Slide 20 · Acanthosis: Thickening of the squamous epithelium

Acanthosis is increased epithelial thickness.

It contributes to the expanded papillary lesion.

Interpret this together with surface configuration and maturation.

Thick epithelium

Underlying connective tissue

Schematic

Slide 21 · Hyperkeratosis may accentuate the surface

Superficial hyperkeratosis can be considerable.

It is a surface change above the underlying thickened epithelium.

Presence or degree of keratinization alone does not define malignancy.

Surface keratin

Underlying connective tissue

Schematic

Slide 22 · Orderly epithelial maturation is retained

Cells retain the normal maturation sequence toward the surface.

This favors the benign condylomatous process.

Preserved maturation helps separate the wart from full-thickness dysplasia.

Toward surface

Underlying connective tissue

Schematic

Slide 23 · Koilocytosis is the characteristic viral cytopathic change

Squamous epithelial cells may show perinuclear cytoplasmic vacuolization.

This perinuclear clearing is called koilocytosis.

It is characteristic of HPV infection in the setting of this lesion.

Perinuclear halo

Schematic cytopathic cells

Slide 24 · Interpret the koilocyte at cellular scale

Locate the nuclear region, then the surrounding clear cytoplasmic halo.

Describe koilocytosis as a cytopathic feature, not a marker of invasion.

Correlate the cellular change with the overall epithelial architecture.

Perinuclear halo

Schematic cytopathic cells

Slide 25 · Architectural and cellular evidence are complementary

Low magnification

Papillary, branching silhouette

Epithelial thickening

Connective-tissue cores

Higher magnification

Orderly squamous maturation

Perinuclear vacuolization

Koilocytosis consistent with HPV effect

Slide 26 · Reading a low-power wart section

Surface

Identify exophytic papillae

Core

Find branching connective tissue

Epithelial lining

Assess thickness and surface keratinization

Slide 27 · Reading a high-power wart section

Maturation

Is squamous maturation preserved?

Cytopathic change

Are perinuclear halos present?

Synthesis

Do cellular and architectural features agree?

Slide 28 · Epithelial thickening is not equivalent to dysplasia

Condylomatous growth

Acanthosis may be marked

Preserved orderly maturation

Koilocytosis may occur

Dysplastic precursor lesion

Abnormal squamous maturation

Atypical nuclear changes

Separate intraepithelial diagnosis

Slide 29 · Distinguish HPV low-risk and high-risk contexts

Condyloma context

HPV 6 and HPV 11

Benign genital wart

Papillary lesion with koilocytosis

PeIN context

High-risk HPV, often HPV 16

Squamous dysplasia within epithelium

Malignant-tumor section: Differential only

Slide 30 · PeIN is confined above the basement membrane

Penile intraepithelial neoplasia is an epithelial precursor lesion.

Its abnormal cells remain within the epidermis when the basement membrane is intact.

Condyloma is instead described by papillary growth and preserved epithelial maturation.

Epithelial compartment

Basement-membrane boundary

Underlying connective tissue

Schematic

Slide 31 · Bowen disease: A clinically relevant mimic

Condyloma

May be multiple or single

Exophytic red papillary excrescence

Orderly maturation and HPV effect

Bowen disease

Often solitary thickened plaque in older men

Full-thickness squamous atypia

Lacks orderly maturation

Slide 32 · Bowenoid papulosis: Papules are not all warts

Condyloma

Low-risk HPV 6/11

Papillary wart architecture

Benign squamous maturation

Bowenoid papulosis

Usually multiple reddish-brown papules

Associated with high-risk HPV 16

Histologically PeIN-like atypia

Slide 33 · Surface resemblance can mislead

An exophytic or papillary gross pattern alone is not a histologic diagnosis.

In the adjacent malignant section, some penile carcinomas may also be warty or papillary.

The presence of a destructive or pushing invasive growth pattern changes the diagnostic category.

Full-thickness epithelial dysplasia differs from an orderly maturing condyloma.

Slide 34 · Verrucous carcinoma is not a benign condyloma

Condyloma acuminatum

Benign, low-risk HPV-related wart

Papillary stromal cores

No invasive carcinoma described

Verrucous carcinoma

HPV-independent carcinoma subtype

Warty, well-differentiated appearance

Locally invasive pushing border

Slide 35 · A morphology-first comparison

Feature

Condyloma acuminatum

PeIN / carcinoma context

Predominant pattern

Exophytic papillae

Dysplasia or invasion

Squamous maturation

Preserved

Disordered in PeIN

Viral context

Often HPV 6; also HPV 11

HPV 16 common in HPV-related PeIN

Tissue level

Benign surface lesion

Intraepithelial or invasive disease

Slide 36 · Clinicopathologic exercise: Papillary lesion

A patient has several small red papillary lesions along the inner prepuce. A biopsy description notes papillary stromal cores, acanthosis, intact maturation, and koilocytosis.

Which lesion does this combination favor, and which feature supports HPV association?

Slide 37 · Case reasoning: Integrate form and cytology

Favored diagnosis: Condyloma acuminatum.

Papillary cores and acanthosis explain the exophytic gross appearance.

Koilocytosis is the characteristic HPV-related cytopathic finding.

Preserved maturation is consistent with the benign histologic pattern.

Slide 38 · Peyronie disease: A fibrosing penile disorder

Defined by hard penile plaques composed of deposited collagen.

The lesion appears reactive rather than neoplastic.

Fibrosis affects connective tissue between the corpora cavernosa and tunica albuginea.

Curvature and pain during intercourse are described clinical effects.

Slide 39 · The word “tumor-like” matters

Why it resembles a mass

Hard palpable plaque

Localized thickening of tissue

May cause focal anatomic distortion

Why it is not a tumor

Collagen deposition is the central process

Reactive rather than neoplastic

Mechanism relates to injury-associated fibrosis

Slide 40 · Identify the implicated connective-tissue plane

The corpora cavernosa are erectile structures.

Tunica albuginea surrounds the erectile tissue.

The collagenous lesion is described near their tissue interface.

Collagen-rich plaque

Corpora cavernosa (schematic cross-section)

Slide 41 · Collagen deposition is the defining substrate

The palpable hard plaque reflects accumulated collagen.

This process is stromal rather than an epithelial surface proliferation.

The composition explains why the lesion is firm and relatively noncompliant.

Collagen-rich plaque

Corpora cavernosa (schematic cross-section)

Slide 42 · Proposed initiating event: Microvascular trauma

Proposed trauma

Microvascular injury

Tissue reaction

Organizing sclerosing inflammation

Remodeling

Collagen-rich fibrous plaque

Slide 43 · Peyronie pathogenesis is a proposed sequence

Robbins characterizes the traumatic hypothesis as a belief, not a proven universal cause.

Microvascular trauma is proposed to lead to subsequent tissue organization.

A sclerosing chronic inflammatory response and collagen deposition follow.

Avoid implying that all individual cases have documented trauma.

Slide 44 · Fibrosis produces a mechanically abnormal segment

The collagen-rich plaque is less compliant than nearby erectile tissue.

This asymmetry provides a mechanical explanation for penile curvature.

It is a clinical interpretation of the scar-like tissue response.

Collagen-rich plaque

Corpora cavernosa (schematic cross-section)

Slide 45 · Curvature is directed toward the plaque

Curvature develops toward the side of the lesion.

Plaque localization therefore helps explain the observed deformity.

The local collagenous plaque is distinct from a papillary epithelial growth.

Straight segment

Plaque-associated bend

Fibrous plaque

Bend toward plaque side

Schematic

Slide 46 · The same scar can cause distortion and pain

Structural effect

Fibrous plaque near erectile tissue

Differential tissue compliance

Curvature toward lesion

Clinical effect

Pain during intercourse

Hard penile plaque

Disorder is not described as an epithelial viral wart

Slide 47 · Hard plaque and papillary wart are not synonyms

Hard connective-tissue plaque

Tissue: Fibrous connective tissue

Surface: May lack papillary excrescence

Mechanism: Reactive fibrosis

Condylomatous wart

Tissue: Squamous epithelium

Surface: Papillary excrescence

Mechanism: HPV-associated proliferation

Slide 48 · Anatomy explains the symptom pattern

Plaque

Localized collagen deposition

Mechanical effect

Asymmetric distensibility

Clinical manifestation

Curvature toward plaque; Pain during intercourse

Slide 49 · Treatment mentioned by Robbins: Surgery

Surgery is listed among treatment options.

The source does not provide specific operative methods or comparative outcomes.

In a pathology lecture, the teaching link is the correction of a fibrous deformity.

Specific selection criteria would require dedicated clinical guideline sources.

Slide 50 · Treatment mentioned by Robbins: Collagenase

Fibrous plaque

Collagen-rich extracellular matrix

Local injection

Collagenase

Intended tissue effect

Lysis of fibrous plaque collagen

Slide 51 · Treatment follows the lesion composition

Collagenase injection

Targets collagenous extracellular matrix

Conceptually addresses plaque composition

No efficacy percentage supplied in source

Surgical approach

Addresses clinically important deformity

Listed by Robbins as an option

No procedure or success rate supplied

Slide 52 · Interpret “reactive” with precision

Reactive means the lesion is considered a tissue response, rather than neoplastic growth.

A localized mass effect can be caused by fibrosis.

A proposed injury pathway is not proof of a specific inciting event.

Distinguish underlying mechanism from observable plaque morphology.

Slide 53 · Clinicopathologic exercise: Penile curvature

A patient presents with a hard penile plaque and curvature toward the affected side. Pain is reported during intercourse. No papillary wart is described.

Which tissue process explains the plaque, curvature, and pain?

Slide 54 · Case reasoning: Localized collagen-rich plaque

Favored disorder: Peyronie disease.

Collagen deposition between the corpora cavernosa and tunica albuginea explains firmness.

Plaque-related mechanical asymmetry explains curvature toward the lesion.

Pain during intercourse as a clinical effect.

Slide 55 · Direct comparison of the two conditions

Dimension

Condyloma acuminatum

Peyronie disease

Process

Low-risk HPV-related wart

Reactive collagenous fibrosis

Compartment

Squamous epithelium

Penile connective tissue

Appearance

Papillary exophytic lesion

Hard localized plaque

Microscopic key

Acanthosis; koilocytosis

Collagen deposition

Clinical clue

Genital surface wart

Curvature; painful intercourse

Slide 56 · Different pathways produce different morphology

HPV infection

Epithelial proliferation

Papillary condyloma

Proposed microvascular trauma

Organizing sclerosis

Fibrous penile plaque

High-risk HPV / inflammation

Squamous dysplasia or carcinoma

Different diagnostic category

Slide 57 · Three key questions for a new penile lesion

Where?

External epithelial surface or deep connective plane?

What pattern?

Papillary wart or hard fibrous plaque?

What microscopy?

Maturation/koilocytosis or collagen deposition?

Slide 58 · Diagnostic pitfall: Relying on gross wart-like appearance

Condyloma is benign, but some carcinomas also form papillary or verruciform masses.

Use cytologic maturation and the tissue invasion pattern to distinguish categories.

The neighboring Robbins malignant-tumor discussion is differential context only.

Do not label an epithelial lesion as low risk solely from a warty gross silhouette.

Slide 59 · Diagnostic pitfall: Calling a fibrous plaque neoplastic

A palpable mass need not be a tumor.

Peyronie disease results from collagenous tissue remodeling.

Its anatomic plane and curvature differ from a papillary epithelial wart.

Distinguish evidence of fibrosis from evidence of epithelial atypia.

Slide 60 · Application: Compare two clinical vignettes

Lesion A: Several small pedunculated red papillae at the coronal sulcus. Lesion B: An indurated plaque associated with curvature toward the involved side.

For each, identify the likely disorder, involved tissue compartment, and defining morphology.

Slide 61 · Vignette answer: Use morphology to assign mechanism

Lesion A: Condyloma acuminatum; Epithelial papillary growth, commonly HPV 6/11-related.

Lesion B: Peyronie disease; Reactive collagen-rich connective-tissue plaque.

A histologic diagnosis should integrate growth pattern, maturation, and anatomic compartment.

Surface papillomatosis and deep fibrosis should not be conflated.

Slide 62 · High-yield morphologic signatures

Observation

Interpretation

Important qualification

Koilocytosis

Characteristic HPV effect

Correlate with architecture

Papillary stromal cores

Condylomatous architecture

Not sufficient alone for benignity

Orderly maturation

Benign wart pattern

Assess full specimen context

Collagenous hard plaque

Reactive Peyronie process

Anatomic site supports diagnosis

Slide 63 · Final synthesis

Condyloma acuminatum

HPV 6/11 → benign genital wart

Papillary projections + acanthosis

Preserved maturation + koilocytosis

Peyronie disease

Reactive collagen deposition

Hard plaques near tunica/corpora

Curvature toward plaque; Intercourse pain

Slide 64 · Textbook reference

Robbins, Cotran & Kumar: Pathologic Basis of Disease. 11th edition (2026).

Chapter 21: The Lower Urinary Tract and Male Genital System — penile benign lesions.

For the main comparison, read the adjacent discussion of penile intraepithelial neoplasia and invasive carcinoma.

All pathology drawings shown here are schematics; interpretation of actual microscopy requires genuine tissue sections.