I now have an excellent collection of histopathology images. I have enough to create high-quality MCQs. Let me now compile the complete 20-question exam:
🔬 BREAST DISORDERS, ENDOCRINE SYSTEM & CNS
Image-Based MCQ Exam — 20 Questions (No Answers)
Q1. BREAST DISORDERS
The microscopic image (C) above shows proliferation of intralobular stroma surrounding and distorting the epithelium, with a sharply delimited border. What is the most likely diagnosis?
- A) Phyllodes tumor
- B) Fibrocystic disease
- C) Fibroadenoma
- D) Sclerosing adenosis
- E) Invasive ductal carcinoma
Q2. ENDOCRINE SYSTEM
This thyroid biopsy shows dense lymphoplasmacytic infiltration with germinal center formation and Hürthle cell change (oxyphilic metaplasia of follicular epithelium). What is the diagnosis?
- A) Subacute granulomatous (de Quervain) thyroiditis
- B) Riedel thyroiditis
- C) Follicular adenoma
- D) Hashimoto (chronic lymphocytic) thyroiditis
- E) Simple goiter
Q3. CNS
The gross specimen (A) shows a necrotic, hemorrhagic, infiltrating cerebral mass. Histology (B) demonstrates serpiginous palisading necrosis with tumor nuclei lining the margins, along with microvascular proliferation (inset). Which WHO grade 4 tumor is shown?
- A) Astrocytoma, IDH-mutant, grade 4
- B) Meningioma
- C) Pilocytic astrocytoma
- D) Glioblastoma, IDH-wild-type
- E) Oligodendroglioma
Q4. ENDOCRINE SYSTEM
The high-power thyroid histology above shows papillary architecture with characteristic enlarged, overlapping, grooved nuclei with pale/empty chromatin ("Orphan Annie eye" nuclei), and intranuclear cytoplasmic pseudoinclusions (arrow in D). What is this lesion?
- A) Follicular adenoma
- B) Simple goiter
- C) Papillary carcinoma of the thyroid
- D) Medullary carcinoma of the thyroid
- E) Follicular carcinoma
Q5. CNS
The coronal brain section (A) shows expansion of the left frontal white matter with blurring of the corticomedullary junction. Histology (B) reveals irregular enlarged nuclei embedded in a fibrillar matrix; IDH1 immunostain (inset) is positive in tumor cells. Which tumor is this?
- A) Glioblastoma, IDH-wild-type
- B) Astrocytoma, IDH-mutant
- C) Meningioma
- D) Brain abscess
- E) Oligodendroglioma
Q6. CNS
The brain cross-section shows discrete lesions with central liquefactive necrosis (arrows) surrounded by edematous brain tissue. This lesion had a collagenous fibrous capsule on microscopy with reactive gliosis (gemistocytic astrocytes) at the periphery. What is the diagnosis?
- A) Glioblastoma multiforme
- B) Cerebral metastasis
- C) Brain abscess
- D) Meningioma
- E) Encephalitis
Q7. CNS
These three histological sections from a demented elderly patient demonstrate dense, dark-speckled deposits scattered throughout the gray matter. These represent Aβ peptide accumulations (senile/neuritic plaques). What is the most likely diagnosis?
- A) Spongiform encephalopathy (prion disease)
- B) Multiple sclerosis
- C) Alzheimer's disease
- D) Cryptococcal meningitis
- E) Encephalitis
Q8. ENDOCRINE SYSTEM
The gross specimen shows a thyroid nodule with substantial replacement of the lobe; cut surface has a light-tan appearance with small foci of hemorrhage. Microscopy showed uniform follicles containing colloid, with capsular invasion on extensive histologic sampling. No Orphan Annie eye nuclei or psammoma bodies. What is the diagnosis?
- A) Papillary carcinoma
- B) Follicular adenoma
- C) Follicular carcinoma
- D) Medullary carcinoma
- E) Hashimoto thyroiditis
Q9. ENDOCRINE SYSTEM
Panel B (right) shows a thyroid follicular neoplasm with irregular penetration through a fibrous capsule into surrounding tissue. Panel A (left) shows an intact enclosing capsule around the neoplastic follicles with compressed normal parenchyma externally. Which feature in Panel B is the KEY distinguishing criterion for malignancy?
- A) Presence of colloid in follicles
- B) Capsular invasion (and/or vascular invasion)
- C) Follicular architecture
- D) Hürthle cell change
- E) Size greater than 2 cm
Q10. ENDOCRINE SYSTEM
The upper panel shows large bilateral adrenal masses. The lower panel microscopy reveals densely packed polygonal cells with granular cytoplasm arranged in small nests (Zellballen pattern) separated by a rich vascular network. These cells stain positive for chromogranin A. What is the diagnosis?
- A) Adrenocortical adenoma
- B) Adrenocortical carcinoma
- C) Neuroblastoma
- D) Pheochromocytoma
- E) Diffuse adrenal hyperplasia
Q11. CNS — Identify the Condition
A 35-year-old woman presents with episodes of unilateral visual loss, followed by limb weakness that partially resolves. MRI T2-weighted sequences show multiple periventricular white matter lesions. A brain biopsy from an active lesion would most likely show:
Which of the following histopathology images best represents the ACTIVE PLAQUE found in this condition?
(Select based on microscopic description: sharply demarcated zones of demyelination with myelin debris-laden macrophages and perivascular lymphocytic cuffing)
- A) Liquefactive necrosis with neutrophil infiltrate
- B) Senile plaques with Aβ deposits
- C) Demyelinated plaque with macrophages stuffed with myelin debris and perivascular lymphocytes
- D) Papillary structures with fibrovascular cores
- E) Lymphocytic infiltrate with germinal centers
Q12. BREAST DISORDERS
A 55-year-old woman presents with unilateral nipple discharge and eczematous crusting of the nipple-areolar complex. Biopsy of the nipple shows large cells with clear, pale cytoplasm and prominent nucleoli scattered within the epidermis, without disrupting the basement membrane. What is this condition?
(Histologic description: Paget cells — large, pale, adenocarcinoma cells within squamous epithelium)
- A) Invasive ductal carcinoma
- B) Squamous cell carcinoma of the nipple
- C) Paget's disease of the breast
- D) Fibrocystic disease
- E) Lobular carcinoma in situ
Q13. ENDOCRINE SYSTEM
A 60-year-old man with longstanding hypertension resistant to three medications undergoes workup. Serum and urinary catecholamines and metanephrines are markedly elevated. CT abdomen shows a 4 cm right adrenal mass. The histology shows polygonal chromaffin cells in a Zellballen pattern. What is the diagnosis?
(Match to the image in Q10)
- A) Adrenocortical adenoma (Conn's syndrome)
- B) Pheochromocytoma
- C) Neuroblastoma
- D) Adrenocortical carcinoma
- E) Myelolipoma
Q14. CNS
A 70-year-old man with progressive dementia undergoes autopsy. Brain sections stained with silver (Bielschowsky) stain show intraneuronal flame-shaped inclusions (neurofibrillary tangles) and extracellular amyloid deposits. Which protein forms the CORE of the extracellular plaques seen in the image below?
- A) Alpha-synuclein
- B) Prion protein (PrPsc)
- C) Amyloid beta (Aβ) peptide derived from APP cleavage
- D) TDP-43
- E) Tau protein
Q15. BREAST DISORDERS
A 48-year-old woman is found to have a stellate sclerotic breast lesion on mammography. Biopsy shows distorted lobular units with small acini compressed and surrounded by dense fibrous stroma. The lobular architecture is preserved but compressed. Microcalcifications are present. What is the diagnosis?
(Histologic description: compressed, distorted acini within a fibrotic stroma — lobular architecture preserved)
- A) Invasive lobular carcinoma
- B) Fibroadenoma
- C) Sclerosing adenosis of the breast
- D) Ductal carcinoma in situ
- E) Radial scar / complex sclerosing lesion
Q16. ENDOCRINE SYSTEM
A 45-year-old woman presents with weight gain, cold intolerance, constipation, and fatigue. Lab: TSH ↑↑, T4 ↓, anti-thyroid peroxidase antibodies +, anti-thyroglobulin antibodies +. Thyroid biopsy is shown below:
What cellular change in the follicular epithelium is characteristic of this condition?
- A) Papillary nuclear features (Orphan Annie eyes)
- B) Hürthle cell (oxyphilic) metaplasia
- C) Clear cell change
- D) Goblet cell metaplasia
- E) Signet ring cell change
Q17. CNS
A 9-year-old boy presents with headache, vomiting, and cerebellar ataxia. MRI shows a well-circumscribed cystic cerebellar lesion with an enhancing mural nodule. Biopsy shows biphasic pattern: compact bipolar cells with Rosenthal fibers AND loose microcystic areas with eosinophilic granular bodies. What is the diagnosis?
(Description: Pilocytic astrocytoma — WHO grade 1)
- A) Glioblastoma
- B) Medulloblastoma
- C) Pilocytic astrocytoma
- D) Ependymoma
- E) Meningioma
Q18. BREAST DISORDERS
A 62-year-old woman presents with an ill-defined breast mass. Core biopsy demonstrates single-file (Indian file) infiltration of small, uniform tumor cells through fibrous stroma. The cells have intracytoplasmic lumina (targetoid appearance). E-cadherin immunostain is NEGATIVE. What is the diagnosis?
(Histologic description: single-file pattern, loss of E-cadherin, intracytoplasmic lumina)
- A) Invasive ductal carcinoma (no special type)
- B) Invasive lobular carcinoma
- C) Medullary carcinoma of the breast
- D) Mucinous carcinoma
- E) Tubular carcinoma
Q19. ENDOCRINE SYSTEM
A 42-year-old woman with a family history of thyroid cancer undergoes thyroidectomy. Histology shows nests of polygonal cells separated by fibrous stroma containing deposits of a pink, homogeneous, amorphous material that stains positive with Congo red and shows apple-green birefringence under polarized light. Calcitonin immunostain is strongly positive. What is the diagnosis?
(Histologic clue: amyloid deposits composed of calcitonin, C-cell origin)
- A) Papillary carcinoma
- B) Follicular carcinoma
- C) Pituitary adenoma
- D) Medullary carcinoma of the thyroid gland
- E) Parathyroid hyperplasia
Q20. CNS
A 28-year-old immunocompromised patient (HIV+) presents with headache and fever. CSF India ink preparation shows encapsulated yeast. Brain biopsy shows abundant mucoid material (mucinous capsule) creating a "soap bubble" appearance in the gray matter with minimal inflammatory response. What is the diagnosis?
(Histologic clue: encapsulated yeast in mucoid lakes, soap-bubble lesions, minimal inflammation in immunocompromised host)
- A) Acute bacterial (pyogenic) meningitis
- B) Influenza meningitis
- C) Brain abscess (bacterial)
- D) Cryptococcal meningitis
- E) Herpes encephalitis
📋 Exam Summary Table
| Q# | System | Topic | Question Type |
|---|
| 1 | Breast | Fibroadenoma | Image → Diagnosis |
| 2 | Endocrine | Hashimoto Thyroiditis | Image → Diagnosis |
| 3 | CNS | Glioblastoma | Image → Diagnosis |
| 4 | Endocrine | Papillary CA Thyroid | Image → Diagnosis |
| 5 | CNS | Astrocytoma IDH-mutant | Image → Diagnosis |
| 6 | CNS | Brain Abscess | Image → Diagnosis |
| 7 | CNS | Alzheimer's Disease | Image → Diagnosis |
| 8 | Endocrine | Follicular Carcinoma | Image → Diagnosis |
| 9 | Endocrine | Follicular CA vs Adenoma | Image → Key Feature |
| 10 | Endocrine | Pheochromocytoma | Image → Diagnosis |
| 11 | CNS | Multiple Sclerosis | Diagnosis → Histology |
| 12 | Breast | Paget's Disease | Diagnosis → Histology |
| 13 | Endocrine | Pheochromocytoma | Clinical → Diagnosis |
| 14 | CNS | Alzheimer's Disease | Image → Protein |
| 15 | Breast | Sclerosing Adenosis | Diagnosis → Histology |
| 16 | Endocrine | Hashimoto Thyroiditis | Image → Feature |
| 17 | CNS | Pilocytic Astrocytoma | Diagnosis → Histology |
| 18 | Breast | Infiltrating Lobular CA | Diagnosis → Histology |
| 19 | Endocrine | Medullary CA Thyroid | Diagnosis → Histology |
| 20 | CNS | Cryptococcal Meningitis | Diagnosis → Histology |
Note: All histopathology images are sourced from Robbins & Cotran Pathologic Basis of Disease and Robbins & Kumar Basic Pathology. MCQs cover all 7 breast disorders and selected endocrine/CNS conditions from your slide lists, alternating between "image → name the diagnosis" and "clinical/histologic description → identify the condition" formats, as requested.