Robbins Must Knows Flashcards
Spectrum of Inflammatory Responses to Infection
6 types of response
- Suppurative (Purulent) Infection
- Mononuclear and Granulomatous inflammation
- Cytopathic-Cytoproliferative reactions
- Tissue necrosis
- Chronic inflammation/scarring
- No reaction
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Increased vascular permeability
Suppurative (Purulent) Infection
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Leukocyte infiltration (neutrophils)
Suppurative (Purulent) Infection
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Chemoattractants from bacteria
Suppurative (Purulent) Infection
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Formation of “pus”
Suppurative (Purulent) Infection
Spectrum of Inflammatory Responses to Infection
Type of Response:
Examples include:
-Pneumonia (Staphylococcus aureus)
-Abscesses (Staphylococcus spp., anaerobic and other
bacteria)
Suppurative (Purulent) Infection
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Mononuclear cell infiltrates (monocytes, macrophages, plasma cells, lymphocytes)
Mononuclear and Granulomatous inflammation
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Cell-mediated immune response to pathogens (“persistent antigen”)
Mononuclear and Granulomatous inflammation
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Formation of granulomata
Mononuclear and Granulomatous inflammation
Spectrum of Inflammatory Responses to Infection
Type of Response:
Examples include:
- Syphilis
- Tuberculosis
Mononuclear and Granulomatous inflammation
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Viral transformation of cells
Cytopathic-cytoproliferative reactions
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Necrosis or proliferation (including multinucleation)
Cytopathic-cytoproliferative reactions
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Linked to neoplasia
Cytopathic-cytoproliferative reactions
Spectrum of Inflammatory Responses to Infection
Type of Response:
Examples include:
- Cervical cancer (human papillomavirus)
- Chicken pox, shingles
- Herpes
Cytopathic-cytoproliferative reactions
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Toxin- or lysis-mediated destruction
Tissue necrosis
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Lack of inflammatory cells
Tissue necrosis
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Rapidly progressive processes
Tissue necrosis
Spectrum of Inflammatory Responses to Infection
Type of Response:
Examples include:
- Gangrene (Clostridium perfringens)
- Hepatitis (hepatitis B virus)
Tissue necrosis
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Repetitive injury leads to fibrosis
Chronic inflammation/ scarring
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Loss of normal parenchyma
Chronic inflammation/ scarring
Spectrum of Inflammatory Responses to Infection
Type of Response:
Example include:
-Chronic hepatitis with cirrhosis (hepatitis B and C viruses)
Chronic inflammation/ scarring
Spectrum of Inflammatory Responses to Infection
Type of Response:
-Severe immune compromise
No reaction
Spectrum of Inflammatory Responses to Infection
Type of Response:
Examples include:
- Mycobacterium avium in untreated AIDS (T-cell deficiency)
- Mucormycosis in bone marrow transplant patients (neutropenia)
No reaction
Three categories of Agents of Bioterrorism
- Category A agents
- Category B agents
- Category C agents
Agents of Bioterrorism
-pose the highest risk and can be readily disseminated or transmitted from person to person, can cause high mortality, might cause public panic, and might require public health preparedness
Category A agents
What category does this agents of Bioterrorism belong?
- Small pox
- B. anthracis,
- Yersinia pestis, and
- Ebola virus
Category A agents
Agents of Bioterrorism
-relatively easy to disseminate, produce moderate morbidity but low mortality, and require specific diagnostic and disease surveillance.
Category B agents
Agents of Bioterrorism
-Many of these agents are food-borne or water-borne
Category B agents
Agents of Bioterrorism
Examples include:
- Brucella spp. and
- V. cholerae.
Category B agents
Agents of Bioterrorism
-include emerging pathogens that could be engineered for mass dissemination because of availability, ease of production and dissemination, potential for high morbidity and mortality, and great impact on health
Category C agents
Agents of Bioterrorism
Examples include:
- Hanta virus
- Nipah virus
Category C agents
STI caused by HSV in Both males and females (2)
- Primary and recurrent herpes
- Neonatal herpes
STI caused by HBV in Both males and females
Hepatitis
STI caused by HPV ONLY in males
Cancer of Penis
STI caused by HPV ONLY in females (2)
- Cervical dysplasia and cancer
- Vulvar cancer
STI caused by HPV in Both males and females
Condyloma acuminatum
STI caused by HIV in Both males and females
AIDS
STI caused by Chlamydia trachomatis ONLY in males (3)
- Urethritis
- Epididymitis
- Proctitis
STI caused by Chlamydia trachomatis ONLY in females (5)
- Urethral syndrome,
- cervicitis,
- bartholinitis,
- salpingitis, and
- sequelae
STI caused by Chlamydia trachomatis Both in males and females
Lymphogranuloma venereum
STI caused by Ureaplasma urealyticum ONLY in males
Urethritis
STI caused by Neisseria gonorrheae ONLY in males (3)
- Epididymitis
- Prostatitis
- Urethral stricture
STI caused by Neisseria gonorrheae ONLY in females (5)
- Cervicitis,
- endometritis,
- bartholinitis,
- salpingitis, and
- sequelae (infertility, ectopic pregnancy, recurrent salpingitis)
STI caused by Neisseria gonorrheae Both in males and females (4)
- Urethritis,
- proctitis,
- pharyngitis,
- disseminated gonococcal infection
STI caused by Treponema pallidum Both in males and females
Syphilis
STI caused by Haemophilus ducreyi Both in males and females
Chancroid
STI caused by Klebsiella granulomatis Both in males and females
Granuloma inguinale (donovanosis)
STI caused by Trichomonas vaginalis ONLY in males (2)
- Urethritis
- Balanitis
STI caused by Trichomonas vaginalis ONLY in females
Vaginitis
critical mediator that activates macrophages and enables them to contain the M. tuberculosis infection
Interferon-gamma
Type of Hypersensitivity Reaction
Immune Mechanism: Production of IgE antibody → immediate release of vasoactive amines and other mediators from mast cells; later recruitment of inflammatory cells
Immediate (type I) hypersensitivity
Type of Hypersensitivity Reaction
Histopathologic Lesion: Vascular dilation, edema, smooth muscle contraction, mucus production, tissue injury, inflammation
Immediate (type I) hypersensitivity
Type of Hypersensitivity Reaction
Prototypical Disorders: Anaphylaxis; allergies; bronchial asthma (atopic forms)
Immediate (type I) hypersensitivity
Type of Hypersensitivity Reaction
Immune Mechanism: Production of IgG, IgM → binds to antigen on target cell or tissue → phagocytosis or lysis of target cell by activated complement or Fc receptors; recruitment of leukocytes
Antibody-mediated (type II)
hypersensitivity
Type of Hypersensitivity Reaction
Histopathologic lesion: Phagocytosis and lysis of cells; inflammation; in some diseases, functional derangements without cell or tissue injury
Antibody-mediated (type II)
hypersensitivity
Type of Hypersensitivity Reaction
Prototypical disorder:
- Autoimmune hemolytic anemia
- Goodpasture syndrome
Antibody-mediated (type II)
hypersensitivity
Type of Hypersensitivity Reaction
Immune Mechanism: Deposition of antigen-antibody complexes → complement activation → recruitment of leukocytes by complement products and Fc receptors → release of enzymes and other toxic molecules
Immune complex– mediated (type III) hypersensitivity
Type of Hypersensitivity Reaction
Histopathologic lesion: Inflammation, necrotizing vasculitis (fibrinoid necrosis)
Immune complex– mediated (type III) hypersensitivity
Type of Hypersensitivity Reaction
Prototypical disorders:
- Systemic lupus erythematosus
- some forms of glomerulonephritis
- serum sickness
- Arthus reaction
Immune complex– mediated (type III) hypersensitivity
Type of Hypersensitivity Reaction
Immune mechanism: Activated T lymphocytes → (1) release of cytokines, inflammation and macrophage activation; (2) T cell–mediated cytotoxicity
Cell-mediated (type IV) hypersensitivity
Type of Hypersensitivity Reaction
Histopathologic lesion: Perivascular cellular infiltrates; edema; granuloma formation; cell destruction
Cell-mediated (type IV) hypersensitivity
Type of Hypersensitivity Reaction
Prototypical disorders:
- Contact dermatitis
- multiple sclerosis
- type 1 diabetes
- tuberculosis
Cell-mediated (type IV) hypersensitivity
represent primary errors of morphogenesis, in which there is an intrinsically abnormal developmental process
Malformations
result from secondary destruction of an organ or body region that was previously normal in development
Disruptions
represent an extrinsic disturbance of development rather than an intrinsic error of morphogenesis
Deformations
a cascade of anomalies triggered by one initiating aberration
Sequence
a constellation of congenital anomalies, believed to be pathologically related, that, in contrast to a sequence, cannot be explained on the basis of a single, localized, initiating defect
Malformation syndrome
What Syndrome?
Associated CHD:
-pulmonary artery stenosis or tetralogy of Fallot
Gene defect:
-Signaling proteins or receptors (JAG1 or NOTCH2)
Alagille syndrome
What Syndrome?
Associated CHD:
-PDA
Gene defect:
-Transcription factor (TFAP2B)
Char syndrome
What Syndrome?
Associated CHD:
-ASD, VSD, PDA, or hypoplastic right side of the heart
Gene defect:
-Helicase-binding protein (CHD7)
CHARGE syndrome
What Syndrome?
Associated CHD:
-ASD, VSD, or outflow tract obstruction
Gene defect:
-Transcription factor (TBX1)
DiGeorge syndrome
What Syndrome?
Associated CHD:
-ASD, VSD, or conduction defect
Gene defect:
-Transcription factor (TBX5)
Holt-Oram syndrome
What Syndrome?
Associated CHD:
-pulmonary valve stenosis, VSD, or hypertrophic cardiomyopathy
Gene defect:
-Signaling proteins (PTPN11, KRAS, SOS1)
Noonan syndrome
Type of Leukemia/Lymphoma
Genotype:
-Diverse chromosomal translocations; t(12;21) involving RUNX1 and ETV6 present in 25%
B-cell acute lymphoblastic leukemia/lymphoma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-Predominantly children; symptoms relating to marrow replacement and pancytopenia; aggressive
B-cell acute lymphoblastic leukemia/lymphoma
Most common leukemias/lymphomas in children (2)
- B-cell acute lymphoblastic leukemia/lymphoma
- Burkitt lymphoma
Cell of origin of B-cell acute lymphoblastic leukemia/lymphoma
Bone marrow precursor B cell
Type of Leukemia/Lymphoma
Genotype:
-Diverse chromosomal translocations; NOTCH1 mutations (50%–70%)
T-cell acute lymphoblastic leukemia/lymphoma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-Predominantly adolescent males; thymic masses and variable bone marrow involvement; aggressive
T-cell acute lymphoblastic leukemia/lymphoma
Cell of origin of T-cell acute lymphoblastic leukemia/lymphoma
Precursor T cell (often of thymic origin)
Type of Leukemia/Lymphoma
Genotype:
-Translocations involving MYC and Ig loci, usually t(8;14); subset EBV-associated
Burkitt lymphoma
Type of Leukemia/Lymphoma
Genotype:
-Diverse chromosomal rearrangements, most often of BCL6 (30%), BCL2 (10%), or MYC (5%)
Diffuse large B-cell lymphoma
Type of Leukemia/Lymphoma
Genotype:
-t(11;18), t(1;14), and t(14;18) creating MALT1-IAP2, BCL10-IGH, and MALT1-IGH fusion genes, respectively
Extranodal marginal zone lymphoma
Type of Leukemia/Lymphoma
Genotype:
-t(14;18) creating BCL2-IGH fusion gene
Follicular lymphoma
Type of Leukemia/Lymphoma
Genotype:
-Activating BRAF mutations
Hairy cell leukemia
Type of Leukemia/Lymphoma
Genotype:
-t(11;14) creating cyclin D1–IGH fusion gene
Mantle cell lymphoma
Type of Leukemia/Lymphoma
Genotype:
-Diverse rearrangements involving IGH; 13q deletions
Multiple myeloma/solitary plasmacytoma
Type of Leukemia/Lymphoma
Genotype:
-Trisomy 12, deletions of 11q, 13q, and 17p; NOTCH1 mutations; splicing factor mutations
Small lymphocytic lymphoma/chronic lymphocytic leukemia
Type of Leukemia/Lymphoma
Salient Clinical Features:
-Adolescents or young adults with extranodal masses; uncommonly presents as “leukemia”; aggressive
Burkitt lymphoma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-All ages, but most common in older adults; often appears as a rapidly growing mass; 30% extranodal; aggressive
Diffuse large B-cell lymphoma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-Arises at extranodal sites in adults with chronic inflammatory diseases; may remain localized; indolent
Extranodal marginal zone lymphoma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-Older adults with generalized lymphadenopathy and marrow involvement; indolent
Follicular lymphoma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-Older men with pancytopenia and splenomegaly; indolent
Hairy cell leukemia
Type of Leukemia/Lymphoma
Salient Clinical Features:
-Older men with disseminated disease; moderately aggressive
Mantle cell lymphoma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-older adults with lytic bone lesions, pathologic fractures, hypercalcemia, and renal failure; moderately aggressive
Multiple myeloma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-isolated plasma cell masses in bone or soft tissue; indolent
Solitary plasmacytoma
Type of Leukemia/Lymphoma
Salient Clinical Features:
-Older adults with bone marrow, lymph node, spleen, and liver disease; autoimmune hemolysis and thrombocytopenia in a minority; indolent
Small lymphocytic lymphoma/chronic lymphocytic leukemia
Cell of origin of Burkitt lymphoma
Germinal center B cell
Cell of origin of DLBCL
Germinal center of post-germinal center B-cell
Cell of origin of Extranodal MZL
Memory B cell
Cell of origin of FL
Germinal center B cell
Cell of origin of Hairy cell leukemia
Memory B cell
Cell of origin of MCL
Naive B cell
Cell of origin of Multiple myeloma/solitary plasmacytoma
Post-germinal center bone marrow homing plasma cell