The pathognomonic lesion of acne
comedone
This mechanism, proposed to induce autoimmunity, is a result of viral or bacterial protein epitopes similar to the host's self-components.
What is 'molecular mimicry'?
Extensive vesicular and pruritic rash and the lesions are in various stages of healing
What is chickenpox?
Wet or dry, drusen are usually there
Macular degeneration
Antinuclear (ANA) and Anti-Smith (Sm)
What are autoantibodies for SLE (Lupus)?
It is when you give an organ to someone and they don't accept it!
What is transplant rejection?
A patient with chronic Rheumatoid arthritis can have this type of extracellular deposits of fibrillar proteins (be specific)
What is AA (amyloid-associated) amyloidosis?
Keratoacanthoma
This autoimmune disease affects 0.2% of the population and is caused by an autoimmune attack on the pancreas.
What is Insulin-dependent diabetes mellitus (IDDM), or What is Type 1 diabetes mellitus?
This lesion is composed of the following cells
What is a caseating granuloma?
This cancer, characterized by keratin pearls, makes up 95% of head and neck cancers.
Squamous cell carcinoma
This is the most sensitive autoantibody for SLE
What is ANA (anti-nuclear antibody)?
What is an allograft?
A 55-year-old Japanese woman has amyloidosis associated with rheumatoid arthritis. She presents with nephrotic syndrome and renal biopsy specimens are obtained. This renal section is stained with the following stain.
What is congo red stain?
Sometimes a signal of occult malignancy when many suddenly appear, but more often occur as "barnacles on the ship of life" as greasy, dark plaques.
seborrheic keratosis
This disease presents as an overlap of SLE, Systemic sclerosis, and Polymyositis
What is Mixed connective tissue disease?
Maine will be testing newborn for this virus
What is Cytomegalovirus (CMV)?
In some parts of Africa, where EBV is endemic, this is the most frequent childhood cancer.
nasopharyngeal carcinoma
Check for this autoantibody for drug-induced lupus
What is anti-histone antibody?
A tissue graft or organ transplant from a donor of a different species from the recipient.
What is Xenograft?
It is also called Vitamin C
What is ascorbic acid?
This skin cancer precursor is famous for its cutaneous horns and association with sun exposure.
Actinic keratosis
The patient with the following signs and symptoms has this disease.
What is Lupus (SLE)?
Painful,erythematous and burning rash in a dermatomal pattern
What are shingles (herpes zoster)?
Because of this, yellow soft cotton wool spots are formed in the retina
What is ischemia?
This autoantibody is most specific for lupus nephritis
What is dsDNA?
These are responsible for hyperacute graft rejection
What is the role of pre-formed antibodies?
This important component of the connective tissue is defective in this sailor
What is collagen?
Characterized by palisading cells surrounding basophilic nests, it's also the most common eyelid malignancy.
Basal cell carcinoma
A 24-year-old female presents to her doctor with increased joint pain over the last six months. On further questioning, she admits to noticing ankle swelling at the end of each day and having a rash that appears across her cheeks and nose after she has been working outside. A complete blood count reveals a platelet count of 90,000/mm3 (150,000 to 400,000/mm3) but otherwise is within normal limits. These are the most specific antibodies for her condition.
What are Anti-dsDNA or anti-Smith antibodies?
It is a pathology test showing multinucleated giant cell and intranuclear inclusions in HSV and VZV infection
What is the Tzanck smear?
Seen especially in immunocompromised patients, it is a fluffy, hyperkeratotic thickening on the lateral border of the tongue.
hairy leukoplakia
Anti-U1-RNP (ribonucleoprotein)
What are autoantibodies for Mixed connective tissue disease?
Manifests as interstitial fibrosis and gradual narrowing of graft blood vessels (graft arteriosclerosis)
What is chronic graft rejection?
This pathological change is visible on a liver biopsy from this child
What is microvesicular steatosis?
Zigzag (or sawtooth)
The occurrence of this type of lymphoma is the most serious complication of Sjogren's syndrome (SS).
What is Non-Hodgkin's lymphoma (NHL)?
Congenital infection with this virus causes Microcephaly and Periventricular Calcifications
What is CMV or Cytomegalovirus?
Surf's up! The fancy name for this fleshy, vascular mass that grows over the cornea.
pterygium
Anti-DNA topoisomerase antibodies
What autoantibody is specific for Systemic Sclerosis?
It occurs a few minutes after the transplant when the antigens are completely unmatched
What is hyperacute graft rejection?
The deficiency of this vitamin caused keratinized patches over her conjunctiva (figure)
What is vitamin A deficiency?
These nonacantholytic blisters occur when antibodies target hemidesmosomes
bullous pemphigoid
What is the mechanism of lupus flares when exposed to sunlight?
The biopsy specimen shows multiple enlarged cells with basophilic intranuclear inclusions and a surrounding halo
What are CMV inclusion bodies?
What are CMV-infected cells?
This substance is commonly produced by sympathetic paragangliomas, but rarely by the parasympathetic types.
Catecholamines
This autoantibody is associated with a higher likelihood of CREST syndrome
What is Anti centromere antibody?
It occurs when the pre-formed antibodies bind to antigens on the graft endothelium and activate the complement and clotting systems leading to endothelial injury, thrombus formation, and ischemic necrosis of the graft
What is hyperacute graft rejection?
What is scurvy?
Seeding of blood by malignant T cells can lead to this diffuse erythema and scaling of the entire body surface.
Sezary syndrome
Order this specific antibody to diagnose this patient
What is anti-DNA topoisomerase I (anti-Scl 70) antibody?
It is this lesion shown here in a pulmonary resection specimen with a rounded calcified nodule
What is a Ghon focus of Tuberculosis?
What is a caseating granuloma?
This developmental cyst usually presents around the crown of an unerupted tooth in the mandible.
Dentigerous cyst
Antibodies against these two antigens can be detected in as many as 90% of patients with Sjogren syndrome.
What are SS-A (Ro) and SS-B (La)?
A 37-year-old man presents with abdominal pain, diarrhea, vomiting, and jaundice. His medical history was significant for acute lymphoblastic leukemia diagnosed 1 year ago. Following ablative chemotherapy, he received a bone marrow allograft from a related donor.
On physical examination, a maculopapular rash is present over his neck, shoulders, palms, and soles. Laboratory studies show elevated AST and ALT. He most likely has this disease.
What is Graft vs Host Disease?
These are the radiodense lines in the metaphysis and epiphysis of the children in the following scenario
What are the lead lines?
Whereas HLA-B locus alleles are strongly associated with psoriatic arthritis, this other class of HLA locus alleles are more strongly associated with cutaneous psoriasis.
HLA-C
In this syndrome, the patient presents with the following features.
What is CREST syndrome?
This is what the liver biopsy shows.
What is microvesicular steatosis?
Cervical lymphoepithelial cysts along the sternocleidomastoid muscle most commonly arise from this branchial arch.
What is the second branchial arch?
This is what happened to her
What is drug-induced SLE? (Phenytoin)
It is one of the most common opportunistic viral infections that affect the outcome of solid organ transplantation.
What is cytomegalovirus?
The deficiency of a particular vitamin causes these two conditions called ---- and ------
What are Xerophthalmia and Bitot spots? (Vitamin A deficiency)
The disease you associate with these granules, and hepatosplenomegaly, signs of bone marrow invasion, and a condition mimicking seborrheic dermatitis.
Langerhans cell histiocytosis (Letterer-Siwe Disease)
What is Mixed connective tissue disease?
Male age 52
Tissue: Lung
This HIV-positive patient developed progressive weight loss, fever and cough. He was found to have multiple small opacities in the lungs on X-ray. He was started on the appropriate treatment but his general condition deteriorated and he died 2 weeks after admission. The section is taken from one of the lungs.
https://www.virtualpathology.leeds.ac.uk/ug/week.php?number=5&case_id=243
What is miliary Tuberculosis?
Associated with cigarette smoking, this parotid gland lesion contains oncocytic cells on a lymphoid stroma.
Warthin tumor (Papillary cystadenoma lymphomatosum)
Mothers with these autoantibodies should be counseled regarding the risk of NLE (neonatal lupus erythematosus)
What are SSA/Ro and/or SSA/La antobodies?
In this type of transplant rejection, we see the following changes
Tubulointerstitial fibrosis
What is chronic rejection?
This type of amyloidosis is seen in this particular disease
What is Multiple Myeloma?