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13 Cards in this Set
- Front
- Back
Actinomycetes:
Actinomycosis: type of bacteria? enter tissue how? Present as an? characterized by? dx? tx? |
- gram + filanmentous anaerobic, 50% cervicofacial
-actinomyces israelii-normal oral flora -through opening via trauma -acute deep suppurative abscess with draining sinus tract(acute response) -colonies of actinomycotic organisms surrounded by neutrophils -sulfar granules: yellowish flecks seen clinically representing colonies of actinomyces dx: histology+culture tx: surgican drainage/debridement and antibiotics |
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Noma
-type of infection frrom? -common in? -clinical manifestation -result -tx? |
-opportunistic infection from normal oral flora in severly immunodeficient
-malnourished in 3rd world -aids -necrotizin ulcerative gingivitis extends to involve adjacent soft issue and beyond -extensive necrosis and makred tissue destruction, facial disfigurement -death -tx: correct underlyin disease, debridement antibioti |
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• HIV-Associated Kaposi’s Sarcoma
most common? compared to non HIV Kaposis? type of tumor? caused by? manfiests as? what can be seen in the oral cavity? requires a ___ for dx? Therapy? |
o The most common malignancy in HIV patients
Non-HIV associated in older/lower extremeties HIV-assoicated: younger, on trunk, mucous membranes and internal organs o A malignant vascular tumor caused by HHV8/KSHV Vascular proliferation o Manifest as multiple lesions of the skin. oral mucosa & viscera o Oral cavity: palate, tongue & gingiva starts as purple macular lesions on skin and later develops into nodules Invade bone o Biopsy is necessary o HAART has significantly reduced KS prevalence |
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• HIV-associated Non-Hodgkin’s Lymphoma
-how common is it? -caused by? -majority are what type? -occur where? |
o The 2nd most common malignancy in HIV patients
o Caused by EBV (KSHV?) o Majority are high grade B-cell lymphoma o Usually occur in extranodal locations CNS is the most common location |
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o Human Papillomavirus
- clinical manifesation - HAART has what affect? - Normal vs. HIV -normal do occur in |
Verruca vulgaris (common wart) and oral squamous papilloma
• Multiple exophytic on papillary nodules HAART treated patients show increased prevalence of HPV-related lesion More exaggerated in HIV patients • Surface corrugated and covered with keratin • Lesions merge together(usually single isolated)never happens in normal patient |
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Aphthous Ulcerations “canker sore”
HIV patients see? |
HIV patients have increased frequency to develop all forms of aphthous ulcer (minor, major and herpetiform)
In contrast to normal patients, most HIV patients develop major or herpetiform variants • Herpetiform: resembles herpetic ulcer, cluster of small pinheadlesions |
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Cytomegalovirus-transmission?
immunocomrpomised patients? histpathology? |
Transmission:
exchange of body fluid, organ transplant Infection ubiquitous, most subclinical o Immunocompromised patients: affects many organs Oral manifestation: • Chronic oral ulcer: often co-infect with HSV • Cytomegaloviral sialadenitis o Histopathology: CMV infected cells are massively enlarged. They contain intranuclear and cytoplasmic inclusions and exhibit “owl eye” alteration Attacks salivary gland too |
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• Acute Lymphonodular Pharyngitis
clinical: nodules caused by? treatment? |
o Clinical: sore throat and flue-like symptom(similar to strept pharyingitis)
Low number of yellow nodules develop in oropharynx area No vesiculation or ulceration o Nodules are caused by lymphoid hyperplasia o Tx: self limiting |
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Chronic Hyerplastic Candidiasis
clinical? sx? dx? histology? |
o Clinical:
White plaque that is not removable, background may be red and inflamed • White from hyperplastic epithelium and increased keratin o Sx Usually asymptomatic o Dx Biopsy is necessary: clinically resemble premalignant lesions o Histology: candidal hyphae penetrating the hyperparakeratotic layer of the epithelium |
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Acute Atrophic Candidiasis
-occurs after? -clinical? -sx? tx? |
Often after broad spectrum antibiotics, or suffer from xerostomia
• Diffuse loss of the filiform papillae of the dorsal tongue o Burning tongue sensation o Sensitive to spices • White area is normal area • Red area = no filiform papillae • Tx: o Antifungals or treat underlying cuase(stop antibiotics or treat xerostomia) |
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• Mucocutaneous Candidiasis
-immunological disorders -complications |
• Mucocutaneous Candidiasis
o Immunological disorders Congenital immunodeficient patients: Patients develop immune disorder during the first few years in life Candidal infections of the mouth, nails, skin and other mucosal surfaces Endorince-candidiasis syndrome, autoimmune polyendocrinopathy-candidasis-ectodermal dystrophy • Some patient develop autoantibody attacking endocrine glands • Develop endocrine abnormalities later in the life: hypothroidism, hypoparathyroidism, Addison’s disease and DM etc • Patients need to be periodically evaluated for their endocrine function. |
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• Histoplasmosis, Coccidiodomycosis & Cryptococcosis : Oral Lesions
clinical features: DDH: Dx? histopathlogy? tx? |
Clinical features:
chronic non-healing ulcer(s), may penetrate bone o DDH for non-healing ulcer: Deep fungal infections, oral squamous cell carcinoma, tramatic ulceration, oral TB and primary syphilis have similar clinical pictures o Biopsy is needed. Serology and cultures are also helful. o Histopathology: granulomatous inflammation. Special stains are used to demonstrate the fungus. Oral lesion is not the primary lesion o Tx: antimicrobial agents |
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Zygomycosis
type of organisms? also know as? -type of infection which infects? -pathogensis -histology |
Zygomycosis(Zebra)
o Caused by fungal organisms of the phylum Zygomycota o Also called “mucormycosis”, “phycomycosis” o An opportunistic infection affecting Uncontrolled diabetes mellitus patients that develop ketoacidosis –thrive in iron Immunocompromised patients o Angiotropic: Invade/grow the arterial wall, result in ischemia, infarction and necrosis o Histology: extensive tissue necrosis and the characteristic fungal hypahe |