Pelvic Inflammatory Disease

Slide 1 · Pelvic Inflammatory Disease

Ascending infection · tubal inflammation · reproductive sequelae

Dr Abu Suraih Sakhri

MBBS, MD (Pathology)

www.abusuraihsakhri.com

Slide 2 · Learning objectives

Trace infection from the lower genital tract into the adnexa.

Contrast gonococcal mucosal disease with puerperal deep-tissue spread.

Recognize acute suppurative and chronic fibrosing salpingitis.

Explain infertility, ectopic pregnancy, and systemic complications.

Organizing question

How does the site and pattern of infection determine the morphology and long-term consequences?

Slide 3 · PID is typically an ascending genital tract infection

Vulva / vagina

Endocervix

Uterine cavity

Fallopian tubes / adnexa

Anatomical significance

The infection usually begins in the vulva or vagina and ascends.

The endocervix, tubes, and tubo-ovarian region can be involved.

The distribution of inflammation depends on the organism and route.

Slide 4 · PID describes a multi-organ inflammatory process

A single ascending infection can affect multiple genital tract sites.

Salpingitis is a principal lesion responsible for late reproductive harm.

Spread into the ovary or peritoneum increases disease extent.

Pathology perspective

PID is a disease process; Salpingitis, pyosalpinx, and tubo-ovarian abscess name particular morphologic manifestations.

Slide 5 · Typical clinical presentation reflects pelvic inflammation

Pelvic pain accompanies inflammation of reproductive and pelvic tissues.

Adnexal tenderness localizes involvement near tubes and ovaries.

Fever and vaginal discharge may accompany infection.

Clinical features vary; The source describes this typical syndrome.

Clinical correlation

Symptoms arise from the anatomic distribution of infection and inflammatory exudate—not from a unique single histologic lesion.

Slide 6 · Two major etiologic settings

Sexually associated PID

Postabortion / puerperal PID

Neisseria gonorrhoeae

Often polymicrobial infection

Chlamydia infection

Staphylococci and streptococci

Typically ascends from lower tract

Coliforms and Clostridium perfringens may contribute

Mucosal inflammation emphasized with gonococcus

Deeper tissue inflammation emphasized after instrumentation or delivery

Slide 7 · Gonococcal infection remains an important cause

Neisseria gonorrhoeae is a recognized cause of ascending PID.

PID is a serious complication of gonorrhea in females.

The endocervical mucosa is the most frequent initial focus.

Ascending spread commonly emphasizes tubal mucosal injury.

Mechanism to remember

The tubal mucosa is an early target; Neutrophilic inflammation and exudate later compromise luminal architecture.

Slide 8 · Chlamydia can progress beyond cervicitis

Chlamydia trachomatis often causes cervicitis.

In some patients, infection ascends into the uterus and fallopian tubes.

Endometritis and salpingitis explain its contribution to PID.

Clinical distinction

Only some infections ascend beyond cervicitis; Progression is not inevitable.

Slide 9 · Pregnancy-related events define another PID context

Infection can follow spontaneous or induced abortion.

Puerperal infection may develop after normal or abnormal delivery.

Uterine procedures provide another setting for nongonococcal spread.

Microbial diversity shapes the clinical and morphologic pattern.

Terminology

Puerperal refers to infections associated with the postpartum period; Postabortion infections can also be polymicrobial.

Slide 10 · Polymicrobial invaders named in the source

Organism group

Examples explicitly cited

Gram-positive cocci

Staphylococci

Gram-positive cocci

Streptococci

Enteric-type bacteria

Coliforms

Anaerobic spore-forming bacteria

Clostridium perfringens

Slide 11 · Etiologic context predicts a different tissue distribution

Gonococcus produces conspicuous mucosal and luminal inflammation.

Nongonococcal puerperal infections often affect the deeper wall.

Wall and serosal involvement facilitates extension outside the organ.

Why it matters

Different routes lead to different patterns of salpingitis, pelvic spread, and bacteremia—even when symptoms overlap.

Slide 12 · Gonococcal spread follows an ascending mucosal pathway

Endocervical

Mucosa

Fallopian

Tube

Tubo-ovarian

Region

Causal / anatomical sequence — schematic

Pathogenic logic

The organism originates in lower tract mucosa and reaches the tube along connected mucosal surfaces.

Slide 13 · Early inflammatory changes follow gonococcal inoculation

Inoculation

~2–7 days

Inflammatory changes

Causal / anatomical sequence — schematic

Interpretation

The interval describes approximate onset of inflammation, not a universal clinical incubation period.

Slide 14 · The endocervix is the usual initial gonococcal focus

Vulva / vagina

Endocervix

Uterine cavity

Fallopian tubes / adnexa

Anatomical significance

Mucosal infection usually starts within the endocervix.

The site is anatomically continuous with the upper tract.

Local inflammation can precede tubal extension.

Slide 15 · Alternative initial gonococcal sites are glandular

Infection may begin in the Bartholin gland.

Other vestibular glands may be involved.

Periurethral glands provide another possible initial site.

The same organism can then ascend from the lower tract.

Anatomic nuance

The endocervix is the common starting site, but glandular lower-tract infection is explicitly described as an alternative.

Slide 16 · Ascending spread makes salpingitis a central lesion

Vulva / vagina

Endocervix

Uterine cavity

Fallopian tubes / adnexa

Anatomical significance

Infection progresses from lower genital structures toward tubes.

Tubal mucosal inflammation causes epithelial and plical injury.

Further extension may involve the ovary and adjacent pelvis.

Slide 17 · Nongonococcal infection may spread via deeper channels

Postabortion /

Uterine procedure

Uterine lymphatic

Or venous spread

Deep organ-wall

Inflammation

Causal / anatomical sequence — schematic

Different from gonococcus

Lymphatic or venous channels are proposed routes after uterine procedures, contrasting with mucosal ascent.

Slide 18 · Mucosal and deep-wall PID are distinct patterns

Feature

Gonococcal pattern

Puerperal / other nongonococcal

Major route

Mucosal ascent

Lymphatic / venous spread proposed

Predominant inflammation

Mucosa and tubal lumen

Deep organ-wall layers

Frequent extension

Tubal lumen → adnexa

Serosa, ligaments, pelvic tissues

Bacteremia

Less frequent in comparison

More frequent with staphylococcal / streptococcal disease

Slide 19 · The primary anatomic route shapes downstream injury

Site of entry

Route of

Propagation

Tissue layer

Injured

Complication

Pattern

Causal / anatomical sequence — schematic

Integrated inference

Compare mucosal exudation and tubal scarring with deep-wall inflammatory extension and systemic dissemination.

Slide 20 · Acute gonococcal disease targets the mucosal surface

Gonococcal inflammation may be intense on the involved mucosa.

Neutrophils predominate in the acute exudative response.

Tubal mucosal injury provides the substrate for later fibrosis.

The tubal lumen can accumulate abundant pus.

Morphologic anchor

The defining acute lesion is a suppurative salpingitis involving tubal mucosa and lumen.

Slide 21 · Acute salpingitis: Edema and purulent luminal material

Purulent material in the lumen

Original anatomical/morphologic schematic — not a histologic specimen

Morphologic interpretation

The tube is congested and its mucosal folds become inflamed.

The lumen can contain abundant purulent exudate.

Inflamed plicae and luminal exudate are illustrated schematically, not as a tissue section.

Slide 22 · Inflammatory infiltrates alter tubal mucosal architecture

Neutrophils infiltrate actively inflamed tubal mucosa.

Plasma cells and lymphocytes may also be present.

Inflammation expands and injures the mucosal plicae.

These changes impair the mucosal surface before permanent scarring develops.

Histopathologic logic

The infiltrate is mixed but acute suppuration is central; Chronic inflammatory cells can coexist with neutrophils.

Slide 23 · Acute inflammation leads to epithelial injury

Congestion /

Infiltration

Epithelial

Damage

Sloughing of

Tubal plicae

Causal / anatomical sequence — schematic

Consequences

Denudation exposes opposing mucosal folds to adhesion and reparative fusion later in the process.

Slide 24 · Purulent exudate may fill the tubal lumen

Neutrophilic exudate fills much of the lumen

Original anatomical/morphologic schematic — not a histologic specimen

Morphologic interpretation

The involved lumen becomes distended with inflammatory exudate.

Neutrophilic pus characterizes the acute suppurative phase.

Persistent exudate can form a pyosalpinx.

Slide 25 · An open fimbrial end permits leakage of pus

Fluid / exudate may pass beyond open fimbriae

Original anatomical/morphologic schematic — not a histologic specimen

Morphologic interpretation

Purulent material may escape at the fimbriated end.

Spread beyond the tube helps explain pelvic/peritoneal involvement.

This is an anatomic sequence, not a reproduction of a tissue section.

Slide 26 · Gonococcal infection may relatively spare the endometrium

Relative endometrial sparing is described in gonococcal tubal infection.

The cause of relative endometrial sparing is explicitly stated to be unclear.

Do not generalize this statement to all PID etiologies.

Chlamydia may cause endometritis in ascending infection.

Interpretation caveat

Relative sparing does not exclude gonococcal disease when endometritis is identified.

Slide 27 · Intraneutrophilic diplococci support gonococcal infection

Smears of exudate may reveal phagocytosed Gram-negative diplococci.

Morphologic identification alone is not definitive.

Organism identification requires culture or gonococcal RNA/DNA detection.

Diagnostic distinction

Cellular morphology suggests etiology; Microbiologic testing establishes identification. No synthetic micrograph is presented.

Slide 28 · Morphology and microbiology answer different questions

Observation / test

What it establishes

Limitation

Suppurative salpingitis

Tissue inflammatory pattern

Does not uniquely identify organism

Smear: Intracellular diplococci

Morphologic clue to gonococcus

Not sufficient alone for definitive diagnosis

Culture

Gonococcal detection

Diagnostic sample and assay matter

Gonococcal RNA or DNA detection

Evidence of organism

Does not alone map severity or extent

Slide 29 · Ascending infection may reach the tubo-ovarian region

Vulva / vagina

Endocervix

Uterine cavity

Fallopian tubes / adnexa

Anatomical significance

Spread may extend from fallopian tubes to the ovary.

Combined tubal and ovarian inflammation is salpingo-oophoritis.

Localized pus may eventually form a tubo-ovarian abscess.

Slide 30 · Acute suppurative salpingitis is the key tubal lesion

Tubal mucosa is congested and inflamed.

Plicae show inflammatory infiltration and epithelial injury.

Neutrophilic exudate expands the tubal lumen.

Spread can create adnexal suppurative collections.

Teaching definition

Salpingitis is inflammation of the fallopian tube; The acute suppurative form features purulent exudation and mucosal destruction.

Slide 31 · Pyosalpinx is pus collected within the tubal lumen

Pus retained within an inflamed fallopian tube

Original anatomical/morphologic schematic — not a histologic specimen

Morphologic interpretation

Location: Within the fallopian tube lumen.

Material: Purulent inflammatory exudate.

Contrast with hydrosalpinx, which describes fluid distention after obstructive scarring.

Slide 32 · Salpingo-oophoritis indicates extension to the ovary

Initial tubal infection spreads to adjacent ovarian tissue.

The salpingo-oophoritis label records involvement of both sites.

Persistent focal suppuration may create tubo-ovarian abscess.

Anatomical extent matters because a localized collection is harder to eradicate.

Site distinction

Salpingitis = tube; Oophoritis = ovary; Salpingo-oophoritis = both.

Slide 33 · Tubo-ovarian abscess is an adnexal purulent collection

Tube

Ovary / purulent collection

Original anatomical/morphologic schematic — not a histologic specimen

Morphologic interpretation

Localized collections of pus can involve tube and ovary.

A walled-off collection may be difficult for antibiotics to eradicate.

The original schematic does not depict a clinical specimen.

Slide 34 · Three related acute morphologic labels

Term

Anatomic emphasis

Principal pathologic feature

Acute salpingitis

Fallopian-tube mucosa and wall

Acute inflammatory infiltration

Pyosalpinx

Fallopian-tube lumen

Collection of pus

Tubo-ovarian abscess

Tubal–ovarian region

Localized suppurative collection

Slide 35 · Abscess encapsulation changes antimicrobial accessibility

A tubo-ovarian abscess is a localized collection of pus.

A walled-off pus collection can be difficult to eradicate with antibiotics.

Selected refractory cases may require surgical removal of affected organs.

Morphologic organization therefore has direct management implications.

Caution

Morphology identifies an abscess but does not, by itself, specify antibiotics or a surgical decision threshold.

Slide 36 · Chronic tubal damage can persist after microbes disappear

Acute suppurative

Inflammation

Organisms may

Disappear

Reparative scarring

Continues

Causal / anatomical sequence — schematic

Temporal distinction

Microbiologic clearance does not ensure restoration of the tubal mucosal architecture.

Slide 37 · Mucosal denudation predisposes plicae to adhesion

Inflammatory

Epithelial injury

Opposed denuded

Mucosal folds

Adhesion and

Fusion

Causal / anatomical sequence — schematic

Morphologic mechanism

Repair of damaged plicae can join structures that normally remain separate.

Slide 38 · Chronic salpingitis: Plical fusion and architectural distortion

Fused mucosal folds → blind pockets

Original anatomical/morphologic schematic — not a histologic specimen

Morphologic interpretation

Tubal mucosal folds adhere and gradually fuse.

Repair produces fibrous distortions of the lumen.

Blind pouches and glandlike spaces may develop.

Slide 39 · Glandlike spaces are a reparative pattern

Fusion of tubal plicae can enclose residual luminal pockets.

These glandlike spaces reflect architectural rearrangement in chronic salpingitis.

They are not evidence of a neoplastic gland-forming process.

Fibrotic reorganization can compromise tubal transport.

Interpretation

A glandlike appearance can arise from nonneoplastic tubal folding and scarring; Assess the underlying inflammatory architecture.

Slide 40 · Chronic salpingitis is a scar-forming lesion

Organisms may no longer be identifiable in late disease.

The plicae become fused by reparative scarring.

Blind luminal pouches alter internal tubal geometry.

The scarring can extend to the fimbriae and narrow the lumen.

Why chronic disease persists

The permanent clinical effect follows loss of tubal architecture, not necessarily persistence of active infection.

Slide 41 · Acute and chronic salpingitis are morphologically different

Feature

Acute salpingitis

Chronic salpingitis

Dominant process

Active purulent inflammation

Repair with scarring

Tubal folds

Congested, infiltrated, denuded

Adherent and fused

Lumen

Purulent exudate may accumulate

Distorted; Blind pouches possible

Clinical implication

Adnexal extension / sepsis

Infertility / ectopic pregnancy

Slide 42 · Fimbrial scarring impairs normal oocyte uptake

Fimbrial fusion

And scarring

Oocyte pickup

Impaired

Reduced chance of

Normal tubal transit

Causal / anatomical sequence — schematic

Reproductive consequence

The fimbriae are needed to collect the released oocyte; Scarring interferes with that function.

Slide 43 · Tubal infertility follows disrupted passage

Tubal lumen

Scarred / narrowed

Oocyte or embryo

Transport impaired

Infertility

Causal / anatomical sequence — schematic

Pathology → function

Tubal scarring and blockage interfere with reproductive transport and may produce infertility.

Slide 44 · An ectopic pregnancy can follow altered tubal transit

Previous tubal

Inflammation

Fibrotic narrowing

And damaged plicae

Abnormal embryo

Transport

Causal / anatomical sequence — schematic

Clinical hazard

An implantation outside the uterine cavity—often in the tube—is a recognized possible consequence of scarring.

Slide 45 · Hydrosalpinx develops when secretions cannot drain

Fusion of

Fimbriae

Tubal secretions

Accumulate

Fluid-filled tubal

Distention

Causal / anatomical sequence — schematic

Morphologic outcome

Hydrosalpinx indicates obstruction with retained tubal secretion, not an inherently pus-filled lumen.

Slide 46 · Pyosalpinx and hydrosalpinx must not be conflated

Feature

Pyosalpinx

Hydrosalpinx

Luminal contents

Purulent exudate

Retained tubal secretion / fluid

Dominant setting

Suppurative infection

Fimbrial occlusion after scarring

Morphologic process

Intraluminal pus collection

Tubal dilation from impaired drainage

Key distinction

Pus

Fluid distention

Slide 47 · Hydrosalpinx is a distended, obstructed tube

Distended, fluid-filled, obstructed tube

Original anatomical/morphologic schematic — not a histologic specimen

Morphologic interpretation

Fusion of fimbriae prevents normal outflow.

Retained secretion enlarges the tubal lumen.

Persistent distention signals an anatomic late sequela.

Slide 48 · Chronic PID may produce persistent pelvic pain

Chronic pelvic pain can be a long-term sequela of PID.

Adhesions and residual inflammatory damage can alter pelvic tissue mobility.

Pain does not establish the specific morphology or current pathogen.

Clinicopathologic limitation

The association is source-established; An individual patient’s pain mechanism requires clinical assessment.

Slide 49 · Pelvic adhesions can lead to intestinal obstruction

Postinflammatory

Pelvic adhesions

Bowel tethering

To pelvic organs

Intestinal

Obstruction

Causal / anatomical sequence — schematic

Extrareproductive complication

Bowel-to-pelvis adhesions can mechanically impair intestinal movement and result in obstruction.

Slide 50 · Puerperal infection often extends into deeper tissue

Compared with gonococcal disease, deep-wall inflammatory involvement is emphasized.

Tubal mucosa and lumen may be relatively less affected.

The inflammatory process can extend through organ walls.

This pattern favors serosal and pelvic extension.

Interpretation

This is a characteristic tendency, not a binary organism-specific microscopic diagnostic criterion.

Slide 51 · Deep-wall inflammation can breach organ boundaries

Deep uterine /

Tubal wall

Serosa and

Broad ligament

Pelvic structures

And peritoneum

Causal / anatomical sequence — schematic

Why severe spread occurs

Full-thickness extension can involve adjacent anatomical compartments beyond the tubal lumen.

Slide 52 · Peritonitis is an important acute complication

Purulent material can escape from the tubal fimbrial region.

Other invasive infections may extend through serosa to peritoneum.

Both mechanisms provide anatomic routes to pelvic peritonitis.

Peritonitis is an important acute complication of ascending PID.

Clinical consequence

Peritoneal involvement marks spread beyond a localized genital-tract infection.

Slide 53 · Bacteremia differs across etiologic patterns

Comparison

Gonococcal PID

Staphylococcal / streptococcal PID

Bacteremia

Described as less frequent

Described as more frequent

Tissue involvement

Strong mucosal component

Often more extensive deeper layers

Major concern

Suppurative tubal injury

Systemic dissemination in addition to local injury

Slide 54 · Bacteremia enables distant suppurative complications

Pelvic infection

Bacteremia

Endocarditis /

Meningitis / arthritis

Causal / anatomical sequence — schematic

Systemic extent

Distant suppurative complications are possible but not universal or typical presentations.

Slide 55 · Early and late consequences require separate thinking

Acute complications

Chronic sequelae

Peritonitis

Infertility and tubal obstruction

Bacteremia

Ectopic pregnancy

Distant infection (e.g., endocarditis)

Persistent pelvic pain

Meningitis or suppurative arthritis

Adhesive intestinal obstruction

Slide 56 · Early gonococcal infection is generally antibiotic responsive

Early gonococcal infection is generally responsive to antimicrobial treatment.

Response is less straightforward when infection becomes a localized abscess.

Antimicrobial treatment does not necessarily reverse prior fibrotic injury.

Separate endpoints

Microbiologic control, acute complication control, and preservation of tubal function are different outcomes.

Slide 57 · Gonococcal antimicrobial resistance complicates care

Antimicrobial resistance complicates management of gonococcal infection.

This challenges assumptions that historical responses remain reliable.

The supplied text does not specify current susceptibility patterns or treatment regimens.

Management choices should use separately verified contemporary guidance.

Management boundary

Treatment choices require current antimicrobial susceptibility information and guidelines; This pathology lecture gives no drug regimen.

Slide 58 · Tubo-ovarian abscess may require surgical intervention

A walled-off pus collection can be difficult to eradicate medically.

The affected organs may occasionally need removal when infection cannot be controlled.

This management issue follows the morphologic state of abscess formation.

Important boundary

The presence of an abscess alone does not determine the timing or type of surgical intervention.

Slide 59 · Polymicrobial postabortion and puerperal PID is harder to control

The pathogen spectrum is broad and may involve several bacterial groups.

These infections may be harder to control than early gonococcal PID.

Both antibiotics and management of the source of infection may matter clinically.

Pathologic explanation

Bacterial diversity and deeper tissue spread help explain the management challenge; No regimen or quantitative claim is assumed.

Slide 60 · Case 1: Acute adnexal suppuration

CLINICAL VIGNETTE

A patient presents with pelvic pain, fever, vaginal discharge, and adnexal tenderness. A fallopian tube is dilated by purulent material, with epithelial sloughing and marked inflammation.

Which lesion best accounts for the tubal lumen finding?

Clinicopathologic explanation

Acute suppurative salpingitis with pyosalpinx. Purulence inside the tubal lumen is the defining clue; Adjacent ovarian involvement would support salpingo-oophoritis or tubo-ovarian abscess.

Slide 61 · Case 2: Infertility after an earlier infection

CLINICAL VIGNETTE

Months after a prior pelvic infection, a patient is assessed for infertility. A tubal specimen shows fused mucosal folds and enclosed glandlike pockets, without the earlier abundant pus.

What morphologic mechanism explains the infertility?

Clinicopathologic explanation

Chronic salpingitis. Reparative fusion and scarring distort the tube and fimbriae, impeding oocyte capture and transit. Similar damage also increases ectopic pregnancy risk.

Slide 62 · A compartment-based interpretation of PID

Location of injury

Characteristic lesion

Potential consequence

Tubal mucosa/lumen

Acute suppurative salpingitis; Pyosalpinx

Spread to adnexa / peritoneum

Tubal plicae and fimbriae

Fusion, scarring, hydrosalpinx

Infertility / ectopic pregnancy

Tubo-ovarian region

Localized abscess

Difficult eradication

Deep wall / serosa

Invasive puerperal-type inflammation

Peritonitis / bacteremia

Slide 63 · Integrated disease progression in four connected stages

Lower genital tract

Infection

Salpingitis or

Deep tissue invasion

Suppuration or

Scar formation

Acute systemic or

Chronic sequelae

Causal / anatomical sequence — schematic

Central synthesis

Anatomic route and tissue response explain both early complications and late reproductive harm.

Slide 64 · High-yield clinicopathologic conclusions

PID is an ascending infection with variable genital and pelvic extent.

Gonococcal disease prominently causes mucosal suppurative salpingitis.

Puerperal polymicrobial infection often spreads through deeper tissue.

Fimbrial and tubal scarring lead to infertility, ectopic pregnancy, and hydrosalpinx.

Exam-level distinction

Pyosalpinx = pus in tube; hydrosalpinx = obstructed fluid-filled tube; tubo-ovarian abscess = localized adnexal pus.