Vascular Pathology Practice Questions

Q: What is the most common site of lymphangiosarcoma?

Post-mastectomy lymphedema of the arm. ***Post-mastectomy lymphedema of the arm*** - Lymphangiosarcoma is a rare, aggressive malignancy that most commonly arises in the setting of **chronic lymphedema**, particularly following **radical mastectomy** for breast cancer [1]. - The chronic lymphedema, often in the arm, creates a microenvironment conducive to the development of this vascular malignancy, known as **Stewart-Treves syndrome**. *Liver* - While the liver can be a site of various primary and metastatic cancers, it is not the most common location for **lymphangiosarcoma**. - Primary liver cancers are typically **hepatocellular carcinoma** or **cholangiocarcinoma**. *Spleen* - The spleen is rarely a primary site for any sarcoma and is not typically associated with the development of **lymphangiosarcoma**. - Splenic involvement usually indicates metastatic disease or a primary **lymphoid malignancy**. *Retroperitoneum* - The retroperitoneum can be a site for various soft tissue sarcomas, such as **liposarcoma** or **leiomyosarcoma** [2]. - However, it is not the most common primary site for **lymphangiosarcoma**, which has a strong predilection for areas of chronic lymphedema. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 125-126. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Bones, Joints, and Soft Tissue Tumors, p. 1222.

Q: Which of the following statements about cavernous hemangioma is false?

Undergo spontaneous regression. ***Undergo spontaneous regression*** - This statement is **false** because **cavernous hemangiomas** typically do not undergo spontaneous regression. They are persistent lesions. - Spontaneous regression is more characteristic of **capillary hemangiomas** (also known as infantile hemangiomas), especially those occurring in early childhood. *Less infiltrative than capillary hemangioma* - This statement is **true**. Cavernous hemangiomas are generally **well-circumscribed** and less infiltrative than capillary hemangiomas, which can sometimes spread more diffusely. - Their distinct, large vascular channels make them easier to delineate from surrounding tissue. *Intravascular thrombosis and dystrophic calcification are seen commonly* - This statement is **true**. The slow blood flow and large, irregular vascular spaces within cavernous hemangiomas predispose them to **thrombosis**. - Subsequent organization of thrombi and **fibrin deposition** often leads to **dystrophic calcification**, which can be visualized radiographically. *Not associated with VHL disease* - This statement is **true**. **Cavernous hemangiomas** are generally **not associated with von Hippel-Lindau (VHL) disease**. - VHL disease is primarily linked to **hemangioblastomas**, particularly in the CNS and retina, which are distinct from common cavernous hemangiomas.

Q: A 5-year-old child presents with perivascular IgA deposition and neutrophilic collection. There is an erythematous rash on the lower limbs and non-blanching purpura. The likely diagnosis in the child is:

Henoch - schonlein purpura. ***Henoch - schonlein purpura*** - Characterized by **perivascular IgA deposition** and **neutrophilic infiltrates** [1], leading to purpura, especially in children. - Presents with **non-blanching purpura** on lower extremities, often accompanied by abdominal pain and arthralgia. *Wegner's granulomatosis* - Typically affects **adults** and is associated with **granulomatous inflammation** and respiratory symptoms, not common in young children. - Involves the **upper and lower respiratory tracts**, along with renal manifestations, differing significantly from this presentation. *Kawasaki disease* - Primarily presents with **fever**, **rash**, and lymphadenopathy; coronary artery involvement is a key concern. - The rash in Kawasaki typically does **not present** as purpura and is not associated with prominent IgA deposition. *Giant cell vasculitis* - Generally affects older adults and presents with **temporal headaches**, vision changes, and scalp tenderness. - **Purpura** and IgA deposition are not features of this condition, making it inappropriate for this child's symptoms. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Cardiovascular Disease, pp. 278-279.

Q: Following are the risk factors of atherosclerosis, except?

Regular moderate exercise. ***Obesity*** - Obesity is considered a **modifiable risk factor** for atherosclerosis as it can be addressed through lifestyle changes like diet and exercise. [2] - It is associated with increased levels of **LDL cholesterol** and other metabolic disturbances that contribute to vascular disease. [5] *Hypertension* - Hypertension is also a **modifiable risk factor** and can be managed through medication and lifestyle changes. [4] - Elevated blood pressure contributes to **endothelial damage** and atherosclerosis progression. [1] *Diabetes* - Diabetes is a significant **modifiable risk factor** as it can worsen atherosclerosis through high blood sugar levels damaging blood vessels. [4] - Management of diabetes through diet, exercise, and medication can significantly reduce cardiovascular risk. [3] *Physical inactivity* - Physical inactivity is a **modifiable risk factor** as regular exercise can improve cardiovascular health and lower atherosclerosis risk. - Increased physical activity helps maintain a healthy weight and reduces **blood pressure** and blood sugar levels.

Q: Monckeberg's calcific sclerosis primarily affects which layer of the medium-sized muscular arteries?

Media. ***Media*** - Monckeberg's calcific sclerosis, also known as **medial calcinosis**, specifically involves the **tunica media** of medium-sized muscular arteries. - This condition is characterized by **calcific deposits** within the smooth muscle layer of the artery wall, without significant luminal narrowing. - Classic "**tram-track**" or "railroad track" appearance on imaging due to medial calcification. *Intima* - The **intima** is primarily affected in **atherosclerosis**, where plaque formation occurs within this innermost layer. - Monckeberg's sclerosis is distinct from atherosclerosis and does not involve significant intimal thickening or lipid deposition. *Adventitia* - The **adventitia** is the outermost layer of the arterial wall, providing structural support and containing nerves and vasa vasorum. - Monckeberg's calcification does not typically involve this layer. *Intima and Media* - While Monckeberg's sclerosis **exclusively affects the media**, this option incorrectly suggests intimal involvement. - The pathognomonic feature of Monckeberg's is its **restriction to the medial layer**, distinguishing it from atherosclerosis.

Q: Which type of blood vessel is most commonly affected in hypersensitivity vasculitis?

Postcapillary venules. ***Postcapillary venules*** - Hypersensitivity vasculitis primarily affects **postcapillary venules**, leading to immune complex deposition and subsequent inflammation [1]. - This type of vasculitis results in **nonspecific inflammation**, commonly seen in conditions like **drug reactions** and **infections**. - The immune complex vasculitis typically involves **small vessels such as the vascular plexus of the skin**, which features neutrophilic infiltration [2]. *Veins* - While veins can be involved in various vascular diseases, they are not specifically characteristic of **hypersensitivity vasculitis**. - This type of vasculitis is more centered around **smaller vessels**, particularly venules, rather than the larger venous systems. *Capillaries* - Capillaries are involved in many vascular conditions, but hypersensitivity vasculitis particularly correlates with **venular structures**. - The immune response seen in hypersensitivity vasculitis is more pronounced in **postcapillary venules**, leading to specific symptoms. *Aerioles* - "Aerioles" may refer to arterioles, which are primarily associated with **hypertensive and ischemic events** rather than vasculitis. - Hypersensitivity vasculitis is primarily due to **post-capillary venule** inflammation rather than changes in arterioles. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of Infancy and Childhood, pp. 514-515. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Cardiovascular Disease, pp. 278-279.

Question 1

What is the most common site of lymphangiosarcoma?

Accepted Answer

Post-mastectomy lymphedema of the arm

Answer

Liver

Answer

Spleen

Answer

Retroperitoneum

Question 2

Which of the following statements about cavernous hemangioma is false?

Accepted Answer

Undergo spontaneous regression

Answer

Not associated with VHL disease

Answer

Less infiltrative than capillary hemangioma

Answer

Intravascular thrombosis and dystrophic calcification are seen commonly

Question 3

A 45-year-old male having a long history of cigarette smoking presented with gangrene of the left foot, which was treated with an amputation. Representative sections from the specimen revealed the presence of arterial thrombus with neutrophilic infiltrate in the arterial wall, as well as inflammation extending into the adjacent veins and nerves. What is the most probable diagnosis?

Accepted Answer

Thromboangiitis obliterans

Answer

Takayasu arteritis

Answer

Giant cell arteritis

Answer

Hypersensitivity angiitis

Question 4

Which one of the following statements best describes a pseudoaneurysm?

Accepted Answer

Focal dilation of vessel in which intimal and medial layers are disrupted and the dilated segment is lined by adventitia

Answer

Apparent dilation of a vessel due to intrinsic narrowing proximal and distal to the point of apparent narrowing

Answer

Dilation of a vessel, though not to the size necessary to be diagnosed as a true aneurysm

Answer

Focal dilation of a vessel only involving one portion of the circumference

Question 5

A 5-year-old child presents with perivascular IgA deposition and neutrophilic collection. There is an erythematous rash on the lower limbs and non-blanching purpura. The likely diagnosis in the child is:

Accepted Answer

Henoch - schonlein purpura

Answer

Wegener's granulomatosis

Answer

Giant cell vasculitis

Answer

Kawasaki disease

Question 6

Following are the risk factors of atherosclerosis, except?

Accepted Answer

Regular moderate exercise

Answer

Diabetes

Answer

Obesity

Answer

Hypertension

Question 7

Monckeberg's calcific sclerosis primarily affects which layer of the medium-sized muscular arteries?

Accepted Answer

Media

Answer

Intima

Answer

Adventitia

Answer

Intima and Media

Question 8

Which type of blood vessel is most commonly affected in hypersensitivity vasculitis?

Accepted Answer

Postcapillary venules

Answer

Arterioles

Answer

Veins

Answer

Capillaries

Vascular Pathology — MCQs

Vascular Pathology — MCQs

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