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​Pathology - Angina Pectoris 
Stable angina is a condition that is mostly caused by the development of atherosclerosis.
Prinzmetal (variant) Angina: Linked to constriction of the coronary arteries
Unstable (crescendo) angina is the result of the breakdown of an atherosclerotic plaque, leading to partial thrombosis in the coronary artery.
Transient ischemia leading to insufficient myocardial oxygenation is the underlying etiology of all forms of angina.

Symptoms and signs 
Stable angina: Experiencing chest discomfort in the area around the heart during physical activity; the pain is alleviated by resting and using nitroglycerin; there are non-specific alterations in the ST-T segment on the electrocardiogram (ECG).
Prinzmetal angina: Occasional chest pain that happens when at rest; may show ST elevation on electrocardiogram (ECG).
Unstable angina: Chest pain that becomes more frequent over time, starting with exercise but eventually occurring even at rest. This is a warning sign that a heart attack may happen soon. It is possible to observe ST depressions on an electrocardiogram (ECG).

Therapy 
The following medications are considered stable: nitrates, B-blockers, statins, and aspirin.
Prinzmetal: Medications that dilate blood vessels (nitrates, calcium channel blockers).
Unstable patients should be treated with B-Blockers, statins, and aspirin. If coronary examination with catheterization is planned in the near future, it is advisable to consider heparin treatment.
Angina pectoris might be asymptomatic in individuals with diabetes.
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Pathology - ​Myocardial  infarction
Coronary artery blockage occurs due to vasospasm, embolus, or the presence of an atherosclerotic thrombus.
Risk factors encompass advancing age and hypertension. Smoking and diabetes. Male sex, women who have reached menopause, and individuals with high levels of lipids in the blood (hyperlipidemia).
The progression of the heart tissue involves a transition from wavy fibers with swelling and bleeding (4-12 hours) to a state of tissue death with increased staining of muscle cells and infiltration of white blood cells (12-36 hours). This is followed by the infiltration of macrophages that engulf dead cells and the formation of granulation tissue (-10 days). Finally, scar tissue forms, which takes approximately 10 days to 2 months.

Symptoms and signs 
The individual experiences severe chest discomfort that extends to the lower jaw and left arm. This pain is accompanied by symptoms such as difficulty breathing and feeling nauseous. and excessive sweating
Possible complications of this condition include cardiac arrhythmia, which can lead to sudden death within the first few days, as well as fibrinous pericarditis, which may occur within 3-5 days. Cardiogenic shock due to congestive heart failure. Thromboembolism, which is the formation of a blood clot that travels and blocks a blood vessel, can lead to the rupture of the ventricular free wall or septum (VSD) within a period of 7-10 days. Papillary muscle rupture resulting in mitral regurgitation. Dressler syndrome refers to the occurrence of autoimmune fibrinous pericarditis several weeks after a myocardial infarction (MI).
Laboratory results• Increased levels of cardiac troponin (seen within 4 hours to 10 days): higher levels of CK-MB, LDH-1, and AST.
Electrocardiogram (ECG): ST-segment elevation myocardial infarction (STEMI) is diagnosed when there is an abrupt increase in the ST segment; non-ST-segment elevation myocardial infarction (non-STEMI) may appear with T waves that are inverted or ST segments that are depressed. Q waves may eventually manifest in both STEMI and non-STEMI cases.


Treatment options for ST-elevation myocardial infarction (STEMI) include thrombolytic treatment or coronary angioplasty. Treatment options for non-ST elevation myocardial infarction include coronary angioplasty or medicinal intervention. 
Treatment for all cases of myocardial infarctions includes medical therapy with aspirin, statins, beta-blockers, and smoking cessation.
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​Pathology - Mitral Stenosis 
Mitral stenosis is a medical condition characterized by the narrowing of the mitral valve.
The condition is typically attributed to rheumatic heart disease, however it can also arise from calcific disease.

The mitral valve exhibits a fish-mouth look due to fibrous thickening, calcification of the leaflets, fusion of the commissures, and shortening of the chordae tendinae.

Symptoms and signs 
Typically manifests more than 10 years after rheumatic fever with difficulty breathing during physical activity. Orthopnea and paroxysmal nocturnal dyspnea. Additional discoveries encompassed the occurrence of postponed, infrequent events. A low-frequency, mid-diastolic sound that occurs immediately after the second heart sound (S2), characterized by a sharp initial sound, and is most audible at the apex of the heart. This sound is associated with an enlargement of the left atrium.

One of the complications is the presence of atrial fibrillation. Preexisting susceptibility to subacute endocarditis. Pulmonary hypertension with right heart failure.

Treatment: In individuals with severe symptomatic mitral stenosis, the recommended treatment options are valve replacement or valvuloplasty. Additionally, heart failure can be managed with the use of diuretics.
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​Pathology - Leukocytoclastic Vasculitis 
Leukocytoclastic vasculitis (hypersensitivity) Vasculitis refers to the inflammation of blood vessels.

The precise source of this condition is not known, although it is believed to be triggered by the deposition of immune complexes in small blood vessels. This deposition can be induced by reactions to drugs, bacterial infections, tumors, or other antigens. It may also be a component of other diseases, such as Henoch-Schönlein purpura or connective tissue disorders.
Pathophysiology refers to the study of the functional changes that occur in the body as a result of a disease or injury. Resulting from a type III hypersensitivity reaction.


Pathology 
Gross Pathology: Impacts the small blood arteries, such as arterioles, capillaries, and venules, particularly in the skin, lungs, heart, gastrointestinal system, muscles, and kidneys. The lesions are of the same age.
Study of cellular and tissue abnormalities at a microscopic level: The vascular medium undergoes fibrinoid necrosis accompanied by infiltration of neutrophils, resulting in fragmented leukocytoclasia. absence of immune deposits

Symptoms and signs 
The patient presents with easily detectable skin discoloration due to bleeding under the skin; coughing up blood; joint pain; blood in the urine and high levels of protein in the urine; gastrointestinal bleeding; muscle pain.
Laboratory results: Increased erythrocyte sedimentation rate (ESR), reduced complement levels

Management 
Discontinuation of the causative agent: corticosteroids
Henoch-Schönlein purpura is a vascular condition that primarily affects children and is commonly associated with a viral upper respiratory tract infection or a streptococcal infection. It exhibits histological similarities to leukocytoclastic vasculitis and is also linked to IgA nephropathy with mesangial IA deposits.
From a clinical perspective, this condition presents as easily detectable purple spots on the arms, legs, and buttocks, accompanied by severe abdominal discomfort, joint pain, and varying degrees of kidney involvement, ranging from modest protein leakage to end-stage renal disease (ESRD). Mild cases of the condition are managed supportively, but severe cases with notable renal involvement are treated with steroids.
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​Pathology - Cryoglobulinemia
Possible causes encompass lymphoproliferative illnesses such as multiple myeloma, chronic lymphocytic leukemia (CLL), and non-Hodgkin lymphoma (NHL), as well as hepatitis C virus (HCV) infection. The causes of autoimmune syndromes can be attributed to infections such as Epstein-Barr virus (EBV) or cytomegalovirus (CMV), or they can occur without a known cause (idiopathic).
Primarily impacts women in their middle age

Study of the nature and causes of diseases. 
Gross Pathology: Impacts the smaller blood arteries, specifically arterioles, capillaries, and venules, with a particular emphasis on the skin and kidneys.
Study of cellular and tissue abnormalities at a microscopic level: Vasculitis characterized by the presence of cryoglobulin immunological deposits causing inflammation of the vascular wall.

Symptoms and signs 
Symptoms include weakness, livedo reticularis, visible purpura, arthralgias, and glomerulonephritis with nephritic syndrome. Anemia: Peripheral neuropathy causes stomach pain.
Laboratory results: Positive cryocrit result. Reduced amounts of C4

Therapy
Address the root cause of the problem; provide steroids or other immunosuppressant medications to manage complications affecting internal organs.
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​Pathology - Thromboembolism Obliterans, often known as Burger Disease

The cause is yet unidentified, although there is a significant correlation with smoking.
Most commonly observed in males between the ages of 25 and 50, however it can also manifest in females.

Study of diseases and their effects on the body. 
Gross Pathology: There is inflammation of specific sections of the small- and medium-sized arteries and veins in the peripheral areas, particularly in the tibial and radial arteries.
Study of cellular and tissue abnormalities at a microscopic level. The affected area shows inflammation that extends across the entire thickness of the wall, with both acute and chronic inflammatory cells present. Additionally, there is the presence of blood clotting within the inner space of the structure, along with small pockets of infection surrounded by a kind of inflammation called granulomatous inflammation.

Symptoms and signs 
The individual experiences intermittent claudication, superficial thrombophlebitis, numbness, and paresthesias in the affected extremities. They also have Raynaud phenomenon, which causes the extremities to become numb and cold. Additionally, they suffer from extremely painful ischemia crises in the limbs, which can lead to ulceration or even gangrene.

Therapy 
Smoking cessation is the act of quitting smoking. Sympathectomy is a surgical procedure used to avoid vasospasm, which is the narrowing of blood vessels. In severe situations where gangrene, which is the death of body tissue, occurs, amputation of the affected limb may be necessary.
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​Pathology - Von Hippel-Lindau disease
This is an autosomal dominant condition that causes the deletion of the von Hippel-Lindau (VHL) gene, which is a tumor suppressor gene located on chromosome 3p.

Study of diseases and their effects on the body. 
Hemangioblastomas, which are vascular tumors accompanied by massive cysts, or cavernous hemangiomas, can occur in the cerebellum, brain stem, and retina.
Liver, kidney, and pancreas adenomas and cysts.

Symptoms and signs 
Manifests first with symptoms such as migraines, ataxia, or loss of eyesight.
Linked to a higher occurrence of renal cell carcinoma, pheochromocytoma, and hemangioblastomas in the eyes and central nervous system.

Administration
Tumor excision and radiotherapy.
A capillary hemangioma is a noncancerous abnormality characterized by a group of blood-filled channels that resemble capillaries. It is the predominant neoplasm in infancy and is accountable for the development of port wine stain birthmarks.
Cavernous hemangioma is characterized by a substantial vascular cavity that is filled with blood. Furthermore, these abnormalities typically exhibit a benign nature.
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​Pathology - Osler Weber Rendu Syndrome 
Osler-Weber-Rendu Syndrome, also known as Hereditary Hemorrhagic Telangiectasia, is a medical condition.

This is an autosomal dominant condition caused by mutations in TGF-Beta-binding proteins. It is more commonly observed among Utah Mormons.

Study of diseases and their effects on the body. 
The epidermis and mucosal membranes of the oral cavity, respiratory system, gastrointestinal tract, and urinary tract experience localized widening and compression of small blood vessels called venules and capillaries.

Symptoms and signs 
Recurrent bleeding from skin and mucous membrane wounds.
Possible complications including gastrointestinal bleeding and nosebleeds.
Laboratory results: Normocytic normochromic anemia refers to a type of anemia characterized by normal-sized red blood cells with normal hemoglobin content.


Treatment options for epistaxis include nasal packing, cautery, and the use of estrogens to decrease bleeding.

Sturge-Weber syndrome is a condition present at birth that is characterized by a birthmark on one side of the face, glaucoma, and abnormal growths on the membranes surrounding the brain. Clinically, it is evident through profound cognitive impairment, epileptic convulsions, and detachment of the retina.
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​Pathology - Kaposi Sarcoma 
Kaposi sarcoma is a type of cancer that affects the skin and other organs.

The cause of this condition is still unknown, although researchers are investigating the possibility of a viral origin and its connection to the immune system.
There are three different versions: (1) Classic Kaposi's sarcoma: observed in elderly males of Ashkenazi Jewish or Mediterranean ancestry; (2) Endemic (African) Kaposi's sarcoma: prevalent in young African males and children; (3) Epidemic Kaposi's sarcoma: triggered by human herpes virus type 8; commonly linked to AIDS, particularly in gay males with low CD4 counts.

Study of the nature and causes of diseases. 
Gross Pathology: Initially, there are reddish macules that gradually develop into elevated plaques and nodules. This condition originates in the skin but can eventually extend to the lymph nodes and internal organs, such as the lungs and gastrointestinal tract.
Microscopic Pathology: The blood arteries are enlarged and include an infiltration of mononuclear cells. This condition will eventually lead to the appearance of spindle cells and hyaline globules. Mitotic figures and hemosiderin pigment.

Symptoms and signs 
The individual presents with painless, reddish-purple, elevated patches and solid non-itchy growths, along with swollen lymph nodes, coughing up blood, difficulty breathing, stomach pain, and gastrointestinal bleeding.
Laboratory results: KSHV antibodies are detected in 70% to 90% of cases.
Attain lower levels of HIV virus in the body and increase the number of CD4 cells by the use of antiviral treatment. 

Therapy 
Manage restricted disease by employing intralesional vinblastine or topical therapies. Administer chemotherapy to address systemic illness.
AIDS is commonly connected with cancers such as Kaposi sarcoma, non-Hodgkin lymphoma (NHL), central nervous system (CNS) lymphomas, and cervical cancer.
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​Pathology - Von Willebrand Disease
Von Willebrand disease is an autosomal dominant disorder characterized by a deficit in von Willebrand factor (vWF).
Acquired von Willebrand disease is linked to cancer and autoimmune disorders, and is caused by reduced production and greater elimination of vWF.
Von Willebrand disease is the prevailing genetic bleeding illness, impacting around 1% of the global population.

Study of diseases and their effects on the body. 
The absence of von Willebrand factor (vWF) leads to a decrease in platelet attachment to the inner lining of blood vessels during damage, which in turn leads to a reduced production of platelet plugs. Deficiency of von Willebrand factor (vWF) leads to a functional deficiency of factor VIII, as vWF also serves as a carrier protein for factor VIII. This deficiency impairs the intrinsic pathway of coagulation.

Symptoms and signs 
Epistaxis; ecchymosis
Laboratory results: The patient exhibits an extended activated partial thromboplastin time (PTT) and prolonged bleeding time, but their prothrombin time (PT) and thrombin time are within normal range. Additionally, their platelet count is normal.

Therapy
Refrain from using aspirin and other blood thinners; consider desmopressin or factor VIII replacement if needed.

There are two bleeding disorders caused by deficiencies in platelet aggregation: (1) Glanzmann thrombasthenia, caused by a deficiency of glycoproteins Ilb and IIIa, which act as receptors for fibrinogen, and (2) Bernard-Soulier disease, caused by a deficiency of glycoprotein Ib, which acts as a receptor for vWF factor. Both illnesses exhibit mucosal bleeding, an extended bleeding period, and normal partial thromboplastin time (PTT) and prothrombin time (PT).
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