Discuss the TNM classification of malignancy and colorectal cancer
T: extent/size of tumor (how far grown in wall colon-mucosa, muscularis properia, suberosa/serosa); N: spread to nearby lymphs; M: metastasis to distant organs
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15
Discuss how Protein S and C work and their relevance in evaluating thrombophilia
Proteins S & C work together to prevent your blood from clotting too much; if low S&C = clot too much; P&C inactivate factors V/VIII = slow down clot formation
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15
why do patients with Ewing sarcoma present with generalized pain?
immune cells trigger inflammation->cytokines->inflammatory markers->activate nociceptors throughout body
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15
What is the underlying pathogenesis of Von Gierk's (Type I) disease?
glucose-6-phosphatase deficiency (can't go from G6P to Glucose)
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15
Discuss the role of factor V in blood clot formation (coagulant) & hemostatic (anticoagulant) regulation
Factor V synthesized in liver; Thrombin activates Factor V-> prothrombin to thrombin; Factor V cofactor aPC to degrade VIII/VIIIA= reduce thrombin formation
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15
Describe the DNA damage that occurs from ultraviolet (UV) radiation and explain how this damage can lead to cancer
UVB causes thymine base pairs to bind to each other->pyrimidine dimers; UVA->ROS=damage DNA repair proteins=cancer
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15
what are 3 drugs that can treat Factor V Leiden and briefly explain their MOA
1. Warfarin-block carboxylation of prothrombin/VII/X & proteins C/S->deactivates Vitamin K; 2. Dabigatran-inhibit thrombin; 3. Rivaroxaban-direct Xa inhibitor
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15
Describe the process of plasmapheresis
liquid part of the blood, or plasma, is separated from the blood cells. Typically, the plasma is replaced with another solution--> returned to body
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Describe how 5-flurouracil (5-FU) produces its chemotherapeutic effect