Free Practice Questions for Forensic Medicine Board

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Sample Forensic Medicine Board Practice Questions

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1A 22-year-old competitive athlete collapses suddenly during a football match and cannot be resuscitated. At autopsy, the heart weighs 520 g with marked disproportionate thickening of the anterior interventricular septum compared to the left ventricular free wall (ratio 1.8:1). What is the primary histological hallmark expected on microscopic examination of the septum?

A.Extensive subendocardial wavefront coagulative necrosis with dense neutrophilic infiltrates

B.Intense lymphocytic infiltration with focal myocyte necrosis and interstitial non-caseating granulomas

C.Transmural replacement of ventricular myocardium by mature adipose and dense fibrous tissue

D.Widespread myofiber disarray with bizarre, branched hypertrophied myocytes and interstitial fibrosis

Explanation: Hypertrophic cardiomyopathy (HCM) is the leading cardiovascular cause of sudden unexpected death in young athletes. The macroscopic hallmark is asymmetrical septal hypertrophy (septum-to-posterior wall thickness ratio > 1.3:1), and the classic histological hallmark is marked myocyte disarray characterized by haphazardly arranged, branched, hypertrophied cardiac myocytes surrounded by interstitial collagen deposition. Coagulative necrosis reflects acute infarction, fibrofatty replacement denotes arrhythmogenic right ventricular cardiomyopathy, and lymphocytic myocarditis represents an inflammatory cardiomyopathy.

2At autopsy of an individual who collapsed 18 hours after presenting with severe substernal chest pressure, sectioning of the heart shows an ill-defined pale yellow area in the anterior wall of the left ventricle. What histological change is characteristically prominent at this post-infarction interval (12 to 24 hours)?

A.Dense, acellular collagenous scar tissue replacing lost myofibers

B.Prominent granulation tissue with active capillary proliferation and loose extracellular matrix

C.Contraction band necrosis with initial hypereosinophilia and early neutrophilic infiltration at margins

D.Total absence of histologic changes on light microscopy with intact myocyte cross-striations

Explanation: Between 12 and 24 hours following acute coronary occlusion, myocardial infarction histologically exhibits pronounced hypereosinophilia of dead myocytes, progressive coagulative necrosis, contraction band necrosis at reperfused margins, and the onset of neutrophilic infiltration into the ischemic zone. Macroscopically, pale mottled or yellow discoloration becomes discernable. Granulation tissue begins developing after 3 to 7 days, dense fibrous scarring requires several weeks to months, and the absence of light microscopic changes is confined to early ischemic intervals under 4 hours.

3A 58-year-old man with poorly controlled hypertension suddenly collapses at home. Autopsy reveals 450 mL of clotted blood in the pericardial sac (cardiac tamponade) secondary to an aortic root rupture. Histological evaluation of the proximal ascending aorta is most likely to demonstrate which underlying vascular abnormality?

A.Cystic medial degeneration with loss of smooth muscle and elastic fragmentation

B.Transmural necrotizing vasculitis with fibrinoid necrosis and leukocytoclasia

C.Monckeberg medial calcific sclerosis with preservation of the elastic lamina

D.Obliterative endarteritis of the vasa vasorum with heavy plasma cell cuffs

Explanation: Aortic dissection leading to hemopericardium and fatal cardiac tamponade is most frequently triggered by systemic arterial hypertension causing cystic medial degeneration (also called cystic medial necrosis). Histologically, this is characterized by elastic fiber fragmentation, loss of medial vascular smooth muscle cells, and accumulation of basophilic ground substance (mucopolysaccharides) in the media. Necrotizing vasculitis indicates autoimmune vasculitides, Monckeberg sclerosis affects muscular arteries without lumen compromise or dissection, and obliterative endarteritis of the vasa vasorum is classical for syphilitic aortitis.

4A 30-year-old woman dies suddenly while jogging. At autopsy, the right ventricle is dilated with marked thinning of the free wall, especially in the inflow tract, apex, and infundibulum ('Triangle of Dysplasia'). What microscopic finding in the right ventricular myocardium confirms arrhythmogenic right ventricular cardiomyopathy (ARVC)?

A.Severe endomyocardial fibrosis with prominent apical obliteration and mural thrombi

B.Extensive amyloid deposition showing apple-green birefringence under polarized light with Congo red

C.Transmural replacement of myocytes by fibrofatty tissue with interstitial inflammatory infiltrates

D.Intracellular accumulation of glycogen vacuoles within myocytes stained positive with Periodic acid-Schiff

Explanation: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a genetically determined desmosomal heart disease characterized by progressive loss of right ventricular myocytes and replacement by adipose and fibrous connective tissue (fibrofatty replacement), often accompanied by patchy interstitial mononuclear infiltrates. The classic anatomical region affected is the 'Triangle of Dysplasia' (apex, inflow tract, and infundibulum). Amyloidosis produces apple-green birefringence, endomyocardial fibrosis obliterates ventricular cavities, and glycogen accumulation reflects metabolic storage diseases such as Pompe disease.

5A 26-year-old man with a known history of generalized tonic-clonic epilepsy is found deceased prone in bed with no evidence of external trauma or toxic substances. Autopsy demonstrates heavy, congested lungs with intra-alveolar proteinaceous edema, a recent lateral tongue bite mark, and an anatomically normal heart. Which diagnosis is most appropriate based on these findings?

A.Acute positional asphyxia from thoracic compression

B.Fatal status epilepticus with aspiration bronchopneumonia

C.Sudden Unexplained Death in Epilepsy (SUDEP)

D.Neurogenic stunned myocardium with subendocardial infarction

Explanation: Sudden Unexpected Death in Epilepsy (SUDEP) is defined as a sudden, unexpected, witnessed or unwitnessed, non-traumatic and non-drowning death in an individual with epilepsy, with or without evidence for a seizure, excluding documented status epilepticus, and in whom postmortem examination does not identify an alternative structural or toxicological cause of death. Postmortem features typically include severe pulmonary edema and congestion, lateral tongue bite injuries, and prone positioning in bed. Bronchopneumonia takes days to develop, positional asphyxia requires mechanical restriction of respiratory excursions, and neurogenic myocardial stunning requires distinct histological contraction bands without defining the primary epilepsy death entity.

6During the postmortem dissection of the pulmonary arteries in a 64-year-old postoperative patient who collapsed suddenly, a large coiled cast-like mass is retrieved from the bifurcated main pulmonary trunk. Which gross and microscopic feature definitively differentiates this antemortem pulmonary thromboembolus from a postmortem 'cruor' (currant jelly / chicken fat) blood clot?

A.Alternating laminations of pale platelet-fibrin layers and dark red erythrocyte-rich layers (Lines of Zahn)

B.Soft, gelatinous consistency with smooth glistening surfaces and uniform red-purple coloration

C.Complete lack of adherence to the underlying pulmonary arterial intimal wall without surface impactions

D.Homogeneous yellow-translucent supernatant containing solely clotted plasma proteins

Explanation: Antemortem arterial and moving venous thrombi display the 'Lines of Zahn', which are visible alternating microscopic and macroscopic laminations formed by pale layers of platelets mixed with fibrin interspersed between darker layers of red blood cells. These laminations signify that the thrombus formed under active blood flow. In contrast, postmortem clots (cruor) form after circulation ceases; they are soft, non-laminated, rubbery, unattached to vessel walls, and gravity-dependent, separating into a dependent dark-red 'currant jelly' layer and an upper yellow-translucent 'chicken fat' layer.

7A 32-year-old multiparous woman experiences sudden profound cardiovascular collapse, seizures, and diffuse disseminated intravascular coagulopathy (DIC) immediately following artificial rupture of membranes during labor. At autopsy, sections of the lungs demonstrate microvascular plugging. What special histochemical or immunohistochemical stain is most specific to highlight fetal squames in the maternal pulmonary microvasculature?

A.Periodic acid-Schiff (PAS) without diastase digestion for glycogen pools

B.Immunohistochemistry for low-molecular-weight cytokeratin (e.g., AE1/AE3)

C.Masson trichrome stain for interstitial collagen bundles

D.Perls Prussian blue stain for intracellular ferric hemosiderin

Explanation: Amniotic fluid embolism (AFE) is diagnosed pathologically by demonstrating fetal elements—specifically squames (anucleate squamous cells), vernix caseosa, lanugo hair, and mucin—within the maternal pulmonary arterioles and capillaries. Low-molecular-weight cytokeratin immunohistochemistry (such as pancytokeratin AE1/AE3 or CK MNF116) intensely and specifically labels fetal epithelial squames. In addition, Alcian blue is commonly employed to demonstrate fetal acidic mucin, whereas Perls Prussian blue highlights iron and trichrome stains collagen.

8A 19-year-old soldier with sickle cell trait (HbAS) collapses following an exhaustive desert physical training drill in high ambient temperatures. Autopsy reveals marked splenomegaly with multiple infarcts, acute tubular necrosis, and massive sickling of red blood cells throughout the microvasculature. Which postmortem biochemical finding helps substantiate active exertional rhabdomyolysis as the immediate mechanism of sudden collapse?

A.Profound isolated elevation of vitreous glucose above 15 mmol/L without ketones

B.Raised blood and urine myoglobin with pigmented granular renal tubular casts

C.Severe depression of postmortem cardiac blood potassium below 2.0 mEq/L

D.Selective elevation of postmortem vitreous calcium above 5.0 mmol/L

Explanation: Exertional collapse in a person with sickle cell trait (HbAS) occurs under extreme exertion, hypoxaemia, dehydration and heat stress, and produces severe exertional rhabdomyolysis, metabolic acidosis, hyperkalaemia and acute kidney injury. The supporting postmortem biochemistry is a markedly raised myoglobin in blood and urine, with pigmented granular casts in the renal tubules on histology; postmortem haemoglobin electrophoresis or genotyping confirms the trait. (Postmortem potassium cannot be interpreted from blood because potassium leaks out of cells after death.)

9At autopsy of an emaciated 38-year-old individual found deceased in an apartment, the prosector notes a sweet, fruity odor upon opening the thoracic cavity. Microscopic section of the kidneys reveals extensive vacuolization of the straight portion of the proximal convoluted renal tubules (Armanni-Ebstein lesion). Which laboratory confirmation supports the diagnosis of fatal diabetic ketoacidosis?

A.Elevated postmortem whole blood lactate with normal vitreous glucose under 1 mmol/L

B.Combined vitreous humor glucose > 13 mmol/L (230 mg/dL) and beta-hydroxybutyrate > 5 mmol/L

C.Depressed vitreous sodium under 100 mmol/L with normal serum beta-hydroxybutyrate

D.Elevated vitreous potassium > 30 mmol/L with absence of urinary ketones

Explanation: Diabetic ketoacidosis (DKA) is proven postmortem by testing vitreous humor and blood for elevated glucose and ketones. A vitreous glucose > 10-13 mmol/L (or combined sum of glucose + lactate > 25 mmol/L) paired with beta-hydroxybutyrate > 2.5-5 mmol/L in blood or vitreous confirms fatal DKA. The Armanni-Ebstein lesion is a classic histological sign consisting of glycogen deposition within the cytoplasm of proximal convoluted and straight renal tubular epithelial cells, stained positively by PAS and eliminated by diastase. Isolated lactate elevation occurs in agonal hypoxia, and high vitreous potassium is a normal postmortem artifact.

10A 45-year-old individual with a history of intravenous drug use is found dead. Autopsy reveals bulky, friable vegetations measuring 1.5 cm on the tricuspid valve leaflets, accompanied by multiple bilateral pulmonary wedge-shaped hemorrhagic consolidations with central necrosis. What is the most likely cause of the pulmonary lesions?

A.Fat embolism syndrome secondary to occult long bone trauma

B.Primary invasive pulmonary aspergillosis with angioinvasion and infarction

C.Septic pulmonary thromboembolism originating from tricuspid valve endocarditis

D.Aspiration of caustic gastric contents causing Mendelson syndrome

Explanation: In intravenous drug users, infective endocarditis preferentially involves the right side of the heart, most commonly the tricuspid valve (frequently caused by Staphylococcus aureus). Fragmentation and detachment of these bulky, friable vegetations release septic emboli into the pulmonary arterial circulation, lodging in peripheral pulmonary vessels and producing multiple bilateral wedge-shaped hemorrhagic infarcts that rapidly develop into septic abscesses. Primary aspergillosis typically affects severely immunocompromised neutropenic hosts, fat embolism features diffuse petechiae without bulky valvular vegetations, and aspiration chemical pneumonitis involves dependent bronchovascular distributions.

About the Forensic Medicine Board Exam

Independent English-language MCQ study adaptation by OpenExamPrep. This independent practice exam by OpenExamPrep provides 100 multiple-choice questions for senior residents preparing for the Saudi Board Final Written Examination in Forensic Medicine. It covers pathology, anatomy, forensic toxicology, core forensic medicine, forensic radiology and sciences, and medical ethics/jurisprudence. OpenExamPrep is an independent educational provider and is not affiliated with, endorsed by, or partnered with the Saudi Commission for Health Specialties (SCFHS). This bank is an MCQ study aid for the written exam and does not simulate the clinical OSCE/oral examination.

Exam sponsor: Saudi Commission for Health Specialties (SCFHS). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.

Time Limit

Not published by SCFHS

Passing Score

70% (lowered to minimum 65% if pass rate under 70%)

Exam / Certification Fees

Not published by SCFHS

Exam sponsor website

Reported exam pass rate: Not published by SCFHS. SCFHS publishes no candidate pass rate. The blueprint instead sets the passing score at 70% and, if fewer than 70% of candidates pass before final approval, lowers that score one mark at a time until a 70% pass rate is reached or the score reaches 65%, whichever comes first; it is never lowered below 65%. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

10%

Pathology

General and systemic pathology, cardiovascular and pulmonary causes of sudden death, neuropathology, and histopathology.

Anatomy

Gross and sectional anatomy of the neck, intracranial compartments, thoracic structures, and skeletal anatomy relevant to autopsy examination.

10%

Forensic Toxicology

Postmortem toxicokinetics, specimen collection and preservation, drugs of abuse, carbon monoxide, heavy metals, and therapeutic poisonings.

65%

Forensic Medicine

Thanatology, postmortem interval estimation, mechanical trauma (blunt, sharp, firearm), asphyxial deaths, pediatric pathology, and maternal deaths.

Forensic Radiology, Sciences, DNA and Odontology

Postmortem CT and radiographic imaging, short tandem repeat (STR) DNA analysis, disaster victim identification (DVI), and forensic odontology.

Medical Ethics, Jurisprudence and Law

Saudi medical liability law, forensic expert testimony, death certification, clinical consent, professional ethics, and chain of custody.

Preparing for the Forensic Medicine Board Exam

What You Need to Know

Passing score: 70% (lowered to minimum 65% if pass rate under 70%)
Assessment: Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.
Time limit: Not published by SCFHS
Exam / certification fees: Not published by SCFHS Official sources

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Frequently Asked Questions

What is the format of the official Saudi Board Forensic Medicine final written exam?

Two papers, each with 100–125 single-best-answer MCQs. Up to 10% additional unscored items may be added. Duration is not stated in the written blueprint.

What is the passing score for the Saudi Board Forensic Medicine written exam?

The standard pass mark is 70%. If fewer than 70% of candidates achieve this score, the passing mark is lowered one mark at a time toward a 70% pass rate, down to an absolute minimum of 65%.

Is this practice question bank affiliated with SCFHS?

No. This question bank is an independent study aid created by OpenExamPrep to assist candidates preparing for the written examination. It is not affiliated with, sponsored by, or endorsed by the Saudi Commission for Health Specialties (SCFHS), and does not simulate the clinical OSCE/oral examination.

Free Practice Questions for Forensic Medicine Board

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