Vascular Surgery Practice Questions

Q: Chronic lymphoedema of a limb is predisposed to all of the following except?

Marjolin's ulcer. ### Explanation **Correct Answer: C. Marjolin's ulcer** **Why Marjolin’s Ulcer is the Correct Answer:** A **Marjolin’s ulcer** is a squamous cell carcinoma (SCC) that arises in areas of **chronic scarring, non-healing wounds, or burn scars**. While chronic lymphoedema involves chronic skin changes, it is not typically associated with the specific cicatrization (scarring) process that leads to a Marjolin’s ulcer. Therefore, it is the "except" in this list. **Analysis of Other Options:** * **A. Thickening of the skin:** Chronic lymphostasis leads to the accumulation of protein-rich fluid, which stimulates fibroblast proliferation. This results in **hyperkeratosis and brawny induration** (non-pitting edema), often progressing to *elephantiasis*. * **B. Recurrent soft tissue infections:** Lymphoedema impairs local immune surveillance. The protein-rich stagnant fluid acts as an excellent culture medium for bacteria, leading to frequent episodes of **cellulitis and lymphangitis** (often caused by *Streptococcus*). * **D. Sarcoma:** A dreaded complication of long-standing chronic lymphoedema is **Stewart-Treves Syndrome**, which is an **angiosarcoma** arising in the affected limb (most classically seen after radical mastectomy). **High-Yield NEET-PG Pearls:** * **Stewart-Treves Syndrome:** Usually occurs 10–15 years after a radical mastectomy. It presents as purple-red nodules on the skin. * **Stemmer’s Sign:** Inability to pinch a fold of skin at the base of the second toe; a pathognomonic clinical sign of lymphoedema. * **Marjolin’s Ulcer Key Fact:** It is most commonly a **well-differentiated Squamous Cell Carcinoma** and is known for being more aggressive than standard SCC. * **Investigation of Choice:** Lymphoscintigraphy is the gold standard for diagnosing the cause of lymphoedema.

Q: Klippel-Trenaunay syndrome is associated with which of the following?

Varicose veins. **Explanation:** **Klippel-Trenaunay Syndrome (KTS)** is a rare congenital vascular anomaly characterized by a classic triad of clinical features. Understanding this triad is essential for identifying the correct answer: 1. **Capillary Malformations:** Typically presenting as a "Port-wine stain." 2. **Venous Malformations:** Most commonly manifesting as **Varicose veins** (often in an atypical distribution, such as the lateral aspect of the limb, known as the *Servelle-Martorell vein*). 3. **Soft tissue and Bony Hypertrophy:** Leading to limb overgrowth (macrodactyly or limb length discrepancy). **Why the correct answer is right:** Varicose veins (Option A) are a core component of the KTS triad. These veins are often present from birth or early childhood and result from venous dysplasia or deep vein abnormalities. **Why other options are incorrect:** * **Arteriovenous malformations (Option B):** This is the most important distractor. If AVMs (high-flow lesions) are present along with the KTS triad, the condition is termed **Parkes-Weber Syndrome**. KTS is strictly a low-flow vascular malformation. * **Aortic aneurysm (Option C):** There is no established clinical association between KTS and aortic aneurysms. * **Lymphedema (Option D):** While lymphatic hypoplasia can occur in KTS, it is not a primary diagnostic feature compared to the classic venous malformations. **Clinical Pearls for NEET-PG:** * **Flow Type:** KTS is a **low-flow** malformation; Parkes-Weber is **high-flow**. * **Diagnosis:** Primarily clinical; however, **Duplex Ultrasound** is the initial investigation of choice to assess the venous system. * **Management:** Mostly conservative (compression stockings). Surgery is reserved for complications due to the high risk of recurrence and deep venous system anomalies.

Q: Which of the following statements about the SEPS procedure is false?

A vascular clip is applied above the level of deep fascia.. **Explanation:** **SEPS (Subfascial Endoscopic Perforator Surgery)** is a minimally invasive surgical technique used to treat chronic venous insufficiency (CVI), specifically targeting incompetent perforating veins. **1. Why Option C is the Correct (False) Statement:** The fundamental principle of SEPS is to ligate perforating veins in the **subfascial space** (the space between the deep fascia and the muscle). In this procedure, an endoscope and instruments are inserted beneath the deep fascia. Therefore, the vascular clips are applied to the perforators **below the level of the deep fascia**, not above it. Applying clips above the fascia would fail to address the segment of the vein that connects the superficial and deep systems. **2. Analysis of Other Options:** * **Option A:** This is true. SEPS is specifically indicated for patients with **incompetent perforators**, especially those with advanced venous disease (CEAP classes C4–C6) like venous ulcers or lipodermatosclerosis. * **Option B:** This is true. The procedure utilizes a **laparoscopic-like setup** with a camera (endoscope) and a balloon dissector to create space under the fascia, allowing for visualization and ligation of the veins. **Clinical Pearls for NEET-PG:** * **Indication:** Primarily used for **venous ulcers (CEAP C6)** where traditional open surgery (Linton’s procedure) is avoided due to high wound complication rates in diseased skin. * **Advantage over Linton’s:** SEPS significantly reduces wound infection and skin necrosis because the incisions are made in healthy proximal skin, away from the ulcer site. * **Contraindications:** Arterial insufficiency (ABI < 0.5) and deep vein thrombosis (DVT). * **Key Anatomy:** Perforators connect the superficial system (Great/Small Saphenous) to the deep system (Femoral/Popliteal) by piercing the deep fascia.

Q: According to the CEAP classification, what does a healed venous ulcer represent?

C5. The **CEAP classification** is the international standard for describing chronic venous disorders. It stands for **C**linical, **E**tiological, **A**natomical, and **P**athophysiological. ### Why C5 is the Correct Answer The Clinical (C) component of the classification is based on objective signs of venous disease. **C5** specifically denotes **skin changes with a healed venous ulcer**. In contrast, an active ulcer is classified as C6. This distinction is vital for tracking disease progression and treatment efficacy. ### Explanation of Incorrect Options * **A. C2 (Varicose Veins):** Represents dilated, tortuous subcutaneous veins ≥3 mm in diameter. There are no skin changes or ulcers at this stage. * **B. C3 (Edema):** Represents swelling of the lower limb without secondary skin changes like pigmentation or eczema. * **C. C4 (Skin Changes):** Represents skin changes secondary to venous hypertension (e.g., C4a: pigmentation/eczema; C4b: lipodermatosclerosis/atrophie blanche). While these often precede ulcers, no ulcer has occurred yet. ### High-Yield Clinical Pearls for NEET-PG * **C0:** No visible or palpable signs of venous disease. * **C1:** Telangiectasias or reticular veins ( 0.5.

Q: Which of the following is true about giant aneurysms?

Pressure effect is often the presenting symptom. **Explanation:** **Giant Intracranial Aneurysms** are defined as aneurysms with a diameter **>25 mm**. Their clinical behavior differs significantly from smaller berry aneurysms. 1. **Why Option C is Correct:** Due to their massive size, giant aneurysms act as **space-occupying lesions**. They exert a significant **mass effect** on adjacent neural structures (cranial nerves or brainstem). For example, a giant aneurysm in the posterior communicating artery often presents with a 3rd nerve palsy. While they can rupture, the "pressure effect" is a hallmark clinical presentation. 2. **Why Options A, B, and D are Incorrect:** * **Option A:** Giant aneurysms have a **high risk of rupture** (estimated at ~6% per year) due to high wall tension (Law of Laplace). They do not "rarely" rupture. * **Option B:** The most common site for giant aneurysms is the **Internal Carotid Artery (ICA)**, particularly the cavernous and ophthalmic segments, followed by the middle cerebral artery (MCA) and the basilar terminus. * **Option D:** While intra-aneurysmal thrombus is common due to turbulent flow, "thromboembolic phenomena" (distal strokes) are less common presenting features compared to the direct mass effect. **High-Yield Clinical Pearls for NEET-PG:** * **Imaging Gold Standard:** Digital Subtraction Angiography (DSA). * **MRI Appearance:** Often shows a "flow void" if patent, or a "popcorn" appearance/laminated layers if partially thrombosed. * **Law of Laplace:** Wall tension = (Pressure × Radius) / Wall thickness. This explains why larger aneurysms are more prone to rupture. * **Common Presentation:** Cranial nerve palsies (especially III, IV, and VI) and visual field defects.

Q: In an extraperitoneal approach for left sympathectomy, which of the following structures may be injured?

Ureter and Gonadal vessels. **Explanation:** Lumbar sympathectomy is commonly performed via an **extraperitoneal approach** (retroperitoneal) to treat peripheral vascular disease or hyperhidrosis. To access the sympathetic chain, which lies on the anterolateral aspect of the lumbar vertebral bodies, the surgeon must retract the peritoneum and its contents medially. **Why Option C is Correct:** The **ureter** and the **gonadal vessels** (testicular or ovarian) are both retroperitoneal structures that are anatomically adherent to the posterior layer of the peritoneum. During the medial displacement of the peritoneal sac to expose the psoas muscle and the sympathetic chain, these structures are lifted and retracted along with the peritoneum. Consequently, they lie directly in the surgical field and are at high risk of accidental traction or transection injuries. **Analysis of Incorrect Options:** * **Option A & B:** While both are at risk, selecting only one is incomplete. Both structures travel in close proximity in the retroperitoneum and are equally vulnerable during the dissection. * **Option D (IVC):** The Inferior Vena Cava is located on the **right side** of the vertebral column. In a **left-sided** sympathectomy, the IVC is not encountered; instead, the **Aorta** would be the major vessel medial to the sympathetic chain. **High-Yield Clinical Pearls for NEET-PG:** * **Anatomical Landmark:** The lumbar sympathetic chain lies in the groove between the **Psoas major muscle** and the **vertebral bodies**. * **Right vs. Left:** On the right, the chain is covered by the **IVC**; on the left, it is lateral to the **Aorta**. * **Identification:** The sympathetic chain is identified by its distinct ganglia (usually L2-L4 are targeted) and its "firm, cord-like" feel compared to the genitofemoral nerve. * **Complication:** The most common side effect of bilateral lumbar sympathectomy in males is **retrograde ejaculation** (due to involvement of L1).

Q: A 30-year-old chronic smoker male presents with a condition requiring diagnosis. What is the most likely diagnosis?

Buerger's disease. ***Buerger's disease*** - **Thromboangiitis obliterans** is strongly associated with chronic smoking in **young males (age 20-40)**, making it the most likely diagnosis. - Classic angiographic finding shows **corkscrew collaterals** and segmental occlusion of small and medium arteries with **inflammation**. *Diabetic gangrene* - Typically occurs in **elderly diabetic patients** with poor glycemic control and peripheral neuropathy. - Associated with **large vessel atherosclerosis** and diabetic complications, not primarily linked to smoking in young adults. *Atherosclerotic plaque* - Usually affects **older patients (>50 years)** with multiple cardiovascular risk factors like hypertension and hyperlipidemia. - Involves **large and medium-sized arteries** with calcified plaques, not the inflammatory small vessel disease seen in young smokers. *Clostridium welchii infection* - **Gas gangrene** presents with rapid onset of severe pain, **crepitus**, and systemic toxicity following trauma or surgery. - Characterized by **muscle necrosis** and gas formation in tissues, unrelated to chronic smoking history.

Q: Which of the following is not a complication of surgery for thoracic outlet syndrome?

Lymphocutaneous fistula. **Explanation:** Thoracic Outlet Syndrome (TOS) surgery typically involves **first rib resection** and/or **scalenectomy** via transaxillary or supraclavicular approaches. Understanding the regional anatomy is key to identifying potential complications. **Why Lymphocutaneous fistula is the correct answer:** While the **thoracic duct** (on the left) or the **right lymphatic duct** can be injured during supraclavicular dissection, this typically results in a **Chylothorax** (if it leaks into the pleura) or a **Chylous fistula**. A "lymphocutaneous fistula" (leakage of clear lymph through the skin) is not a recognized or standard complication of TOS surgery. **Analysis of incorrect options:** * **Pneumothorax:** This is the **most common complication** of TOS surgery. The apical pleura lies immediately adjacent to the first rib; accidental entry into the pleural space during rib resection is frequent. * **Brachial Plexus Injury:** The roots and trunks of the brachial plexus pass through the scalene triangle directly over the first rib. Excessive traction or direct trauma during surgery can lead to temporary neuropraxia or permanent palsy. * **Long Thoracic Nerve Injury:** This nerve (C5-C7) can be injured during the transaxillary approach as it courses along the chest wall. Injury leads to **winging of the scapula**. **High-Yield Clinical Pearls for NEET-PG:** * **Most common nerve injured:** Lower trunk of the brachial plexus (C8-T1) or the Intercostobrachial nerve (causing numbness in the inner arm). * **Vascular structures at risk:** Subclavian artery and vein. * **Adson’s Test:** A classic clinical test for TOS where the radial pulse disappears upon neck extension and rotation to the affected side. * **Paget-Schroetter Syndrome:** Effort-induced thrombosis of the subclavian vein, often requiring first rib resection.

Question 1

Chronic lymphoedema of a limb is predisposed to all of the following except?

Accepted Answer

Marjolin's ulcer

Answer

Thickening of the skin

Answer

Recurrent soft tissue infections

Answer

Sarcoma

Question 2

Klippel-Trenaunay syndrome is associated with which of the following?

Accepted Answer

Varicose veins

Answer

Arteriovenous malformations

Answer

Aortic aneurysm

Answer

Lymphedema

Question 3

Obstruction at the bifurcation of the aorta leads to which of the following clinical manifestations?

Accepted Answer

Claudication of the buttocks and thighs

Answer

Retrograde ejaculation

Answer

Gangrene

Answer

Pallor of the lower limb

Question 4

Which of the following statements about the SEPS procedure is false?

Accepted Answer

A vascular clip is applied above the level of deep fascia.

Answer

It is used for incompetent perforators.

Answer

The procedure is performed with the help of an endoscope.

Answer

None of the above.

Question 5

According to the CEAP classification, what does a healed venous ulcer represent?

Accepted Answer

C5

Answer

C2

Answer

C3

Answer

C4

Question 6

Which of the following is true about giant aneurysms?

Accepted Answer

Pressure effect is often the presenting symptom

Answer

Rarely rupture

Answer

Most common in the middle cerebral artery

Answer

Thromboembolic phenomena are present

Question 7

In an extraperitoneal approach for left sympathectomy, which of the following structures may be injured?

Accepted Answer

Ureter and Gonadal vessels

Answer

Ureter

Answer

Gonadal vessels

Answer

Inferior Vena Cava (IVC)

Question 8

Following graft repair of a thoraco-abdominal aneurysm, a patient develops lower limb weakness. What is the most probable cause for this complication?

Accepted Answer

Disruption of the artery of Adamkiewicz (great anterior radicular artery)

Answer

Decreased blood supply to the lower limbs

Answer

Thoracosplanchnic injury

Answer

Lumbosacral nerve injury

Question 9

A 30-year-old chronic smoker male presents with a condition requiring diagnosis. What is the most likely diagnosis?

Accepted Answer

Buerger's disease

Answer

Diabetic gangrene

Answer

Atherosclerotic plaque

Answer

Clostridium welchii infection

Question 10

Which of the following is not a complication of surgery for thoracic outlet syndrome?

Accepted Answer

Lymphocutaneous fistula

Answer

Pneumothorax

Answer

Brachial plexus injury

Answer

Long thoracic nerve injury

Vascular Surgery — MCQs

Vascular Surgery — MCQs

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