General Examination 1: Check for Clubbing General Examination 2: Check for Pallor • System Examination 1: Test Light Touch sensory modality System Examination 2: Test Pain sensory modality procedures with photos

Reading File

Finding Sources

Reading File

Searching Images

clubbing of fingers clinical examination

Clinical photograph showing a side-by-side comparison of the hands and feet of a 62-year-old patient to demonstrate selective digital clubbing. The fingernails exhibit normal morphology, curvature, and nail-bed angles, with no evidence of hypertrophic osteoarthropathy or swelling in the finger pads. In contrast, the toes demonstrate prominent digital clubbing (hippocratic fingers), characterized by increased convexity of the nail plates and bulbous expansion of the distal phalanges, most notably in the hallux bilaterally. The skin on both the hands and feet appears thin and wrinkled, consistent with chronological age, but lacks acute skin lesions, cyanosis, or pedal edema. Clinically, this isolated lower limb clubbing is a significant finding that often suggests a patent ductus arteriosus with reversed shunt (Eisenmenger syndrome), although in this specific educational context, it illustrates a rare presentation associated with interstitial lung disease. The image serves as a diagnostic reference for distinguishing localized versus systemic clubbing during a physical examination.

This clinical photograph displays the dorsal view of both hands of a 39-year-old female patient against a teal background, demonstrating classic features of digital clubbing. The distal phalanges of all fingers show noticeable bulbous enlargement and rounding, known as a drumstick appearance. The fingernails exhibit increased longitudinal and transverse convexity with an obliterated Lovibond angle (the angle between the nail plate and the proximal nail fold). On the left wrist, an indwelling intravenous (IV) catheter is visible, secured with a transparent adhesive dressing. The skin appears pale, and the overall morphology is highly suggestive of hypertrophic osteoarthropathy or secondary clubbing related to chronic systemic disease. In this specific clinical context, the clubbing was associated with a large cardiac sarcoma causing functional mitral stenosis. This image serves as an educational example of paraneoplastic or cardiovascular-related physical signs during a clinical examination.

This clinical photograph displays the hand and fingers of a patient with severe digital clubbing, a clinical sign often associated with chronic hypoxia or certain systemic diseases. The image demonstrates characteristic 'drumstick' appearances of the distal phalanges, characterized by bulbous swelling and enlargement of the fingertips. The nails exhibit increased convexity in both the longitudinal and transverse planes, along with a significant increase in the Lovibond angle (the angle between the nail plate and the proximal nail fold). The skin overlying the interphalangeal joints shows marked thickening and deep, horizontal wrinkling, consistent with pachydermoperiostosis (primary hypertrophic osteoarthropathy). These visual findings are diagnostic markers for advanced clubbing (Grade 4). The content is relevant for medical education focusing on physical examination signs, rheumatology, and pulmonology.

Reading File

Searching Images

pallor examination conjunctiva anemia

This composite clinical photograph illustrates common physical examination findings associated with severe anemia. The left panel shows the bilateral palms of a patient, demonstrating marked palmar pallor. The skin on the palms and creases appears significantly lighter and lacks the typical pinkish hue of healthy vascularized tissue, suggesting reduced hemoglobin concentration. The right panel is a close-up of the patient's face with the lower eyelid retracted to reveal the palpebral conjunctiva. Instead of the normal vibrant red or pink color, the conjunctiva exhibits conjunctival pallor, appearing whitish or very pale pink. These visual signs are critical diagnostic markers in hematology and general medicine for identifying systemic conditions such as iron-deficiency anemia or other forms of chronic blood loss. The image serves as a teaching tool for medical students and clinicians to recognize mucosal and cutaneous indicators of decreased red blood cell mass or oxygen-carrying capacity.

Searching Images

light touch sensory testing cotton wool neurological examination

Searching Images

pain sensation pinprick neurological sensory testing

Reading File

Searching Images

Schamroth window test clubbing diagnosis

Searching Images

sensory testing neurological examination dermatomal

Finding Sources

Searching Images

grading clubbing nails Schamroth lovibond angle

Finding Sources

Searching Images

pallor nail beds palmar creases anemia

Loading Image

Now I have all the information needed. Let me compile the full, structured clinical guide.

Clinical Examination Guide: General & System Examinations

GENERAL EXAMINATION 1: Clubbing

Definition

Clubbing is an increase in the soft tissue of the distal phalanges of the fingers (and toes), resulting in loss of the normal angle between the nail plate and nail fold, bulbous fingertip enlargement, and increased nail convexity. - Murray & Nadel's Textbook of Respiratory Medicine

Pathophysiology

The main pathological finding is increased capillary density stimulated by hypoxia, which produces vascular growth factors (VEGF, PDGF, HIF-1α, HIF-2α). A second mechanism is shunting of blood past the capillary bed of the lung or liver, preventing metabolism of circulating angiogenic factors. - Murray & Nadel's Textbook of Respiratory Medicine

How to Examine for Clubbing - Step-by-Step

Step 1 - Inspect from the side (lateral profile)

Look at the nail from the side. Normally, the angle between the nail plate and the proximal nail fold (Lovibond angle) is less than 165°.
In clubbing, this angle is obliterated (≥180°) - the nail lies flat or curves upward.

Step 2 - Schamroth's Window Test

Ask the patient to place the dorsal surfaces of the terminal phalanges of corresponding fingers (index or middle finger) of opposite hands together.
Normally, a small diamond-shaped window (gap) is visible at the base of the nail beds.
In clubbing, this window is absent - the gap is obliterated.

Step 3 - Palpate the nail bed

Press gently on the base of the nail. In clubbing, the nail bed feels boggy/fluctuant (floating nail sign) - the nail appears to "float" on the soft tissue.
There may be periungual erythema and warmth.

Step 4 - Inspect the fingertip profile

Look for bulbous enlargement (drumstick appearance) of the distal phalanx.
The nail itself may curve both longitudinally and transversely (watch-glass/parrot-beak nail).

Step 5 - Check toes

Examine the toes in the same manner (often involved together with fingers).

Grading of Clubbing (Schamroth / Clinical Grading)

Grade	Features
Grade 1	Fluctuation and softening of the nail bed (floating nail)
Grade 2	Obliteration of the Lovibond angle
Grade 3	Drumstick appearance - bulbous enlargement of the distal phalanx
Grade 4	Hypertrophic osteoarthropathy (periosteal new bone formation in long bones)

Clinical Photos

Fig 1: Isolated toe clubbing (selective digital clubbing) - note normal fingers, prominent bulbous toes bilaterally

Selective toe clubbing - normal fingers with bulbous clubbed toes

Fig 2: Bilateral hand clubbing - drumstick appearance with increased transverse/longitudinal nail convexity and obliterated Lovibond angle (associated with cardiac sarcoma)

Bilateral clubbing - drumstick fingertips and obliterated Lovibond angle

Fig 3: Advanced clubbing (Grade 3-4) - bulbous fingertip enlargement, increased nail convexity, skin thickening over IP joints consistent with pachydermoperiostosis

Advanced grade clubbing with drumstick fingers and nail convexity

Causes of Clubbing (Mnemonic: CLUBBING)

Cardiovascular: cyanotic congenital heart disease, infective endocarditis, atrial myxoma
Lung: bronchogenic carcinoma, bronchiectasis, lung abscess, empyema, cystic fibrosis, ILD
Ulcerative colitis / IBD
Biliary cirrhosis / hepatopulmonary syndrome
Benign (idiopathic/familial)
Infective: HIV (in children), subacute bacterial endocarditis
Not present in: COPD, asthma (except in complications)
Gut: Crohn's disease, GI lymphoma

New-onset clubbing warrants a chest X-ray and if unremarkable, a CT chest to exclude pulmonary neoplasm. - Murray & Nadel's Textbook of Respiratory Medicine

GENERAL EXAMINATION 2: Pallor

Definition

Pallor is abnormal paleness of skin and mucous membranes due to reduced oxyhemoglobin, reduced blood flow, or vasoconstriction. As a general examination sign, it is a marker of anemia or circulatory compromise.

How to Examine for Pallor - Step-by-Step

Step 1 - Ensure adequate lighting

Examine in bright daylight or good artificial light. Fluorescent/yellow light makes pallor assessment unreliable.

Step 2 - Conjunctival pallor (most reliable site)

Ask the patient to look upward.
Gently pull down the lower eyelid with your thumb.
Inspect the palpebral conjunctiva: normally it is deep pink/red.
Pallor = the conjunctiva appears pale pink, whitish, or white.
This is the single most reliable clinical indicator of anemia.

Step 3 - Palmar pallor

Hold the patient's hand, fingers extended and slightly hyperextended to stretch the palmar skin.
Compare the color of the palmar creases with your own (or with those of someone known not to be anemic).
Pallor of the palmar creases = hemoglobin is likely <7-8 g/dL (severe anemia).

Step 4 - Nail bed pallor

Press the nail bed momentarily then release.
In pallor, the nail bed and the blanched area after pressure release both appear white/pale rather than pinkish.

Step 5 - Mucous membranes

Inspect the tongue and buccal mucosa (inner cheeks): normally moist and pink.
Pale/white tongue/buccal mucosa supports pallor.

Step 6 - Other sites

Skin creases of the palm (already covered), lips, and ear lobes.
In dark-skinned individuals, conjunctival and mucosal assessment is much more reliable than skin inspection.

Grading of Pallor

Grade	Clinical Finding
Mild	Pallor in conjunctiva or mucous membranes only
Moderate	Pallor in conjunctiva + palmar creases
Severe	Pallor in all sites including tongue, lips, nail beds

Clinical Photo

Fig 4: Pallor examination - Left: palmar pallor (pale palmar creases); Right: palpebral conjunctival pallor (pale whitish conjunctiva on lower lid retraction) - signs of severe anemia

Palmar pallor and conjunctival pallor indicating severe anemia

Causes of Pallor

Anemia (most common): iron deficiency, hemolytic, megaloblastic, aplastic
Acute blood loss
Shock / reduced cardiac output
Hypothyroidism / hypopituitarism (reduced skin blood flow)
Chronic renal failure
Leukemia, lymphoma, bone marrow infiltration

SYSTEM EXAMINATION 1: Light Touch Sensory Modality

Pathway (Dorsal Columns)

Light touch travels via large myelinated Aβ fibers → ipsilateral dorsal column → medial lemniscus → thalamus → parietal somatosensory cortex. It runs together with vibration and proprioception in the posterior columns.

How to Test Light Touch - Step-by-Step

Equipment needed: A wisp of cotton wool or the examiner's fingertip.

Step 1 - Explain the procedure

Tell the patient: "I am going to touch your skin very gently with a piece of cotton. Please say 'yes' each time you feel it, and tell me if it feels the same on both sides."

Step 2 - Demonstrate first

Demonstrate the touch on the patient's sternum or forehead (an area where sensation should be normal) so the patient knows what to expect.

Step 3 - Ask the patient to close their eyes

This eliminates visual cues and ensures responses are purely sensory.

Step 4 - Apply the stimulus

Using a small wisp of cotton (teased to a fine point) or a very gentle fingertip touch, lightly dab (do not stroke) the skin surface.
Apply a single touch, not a repeated stroke (to avoid adapting to movement).
Touch at irregular intervals so the patient cannot anticipate.

Step 5 - Systematic testing pattern Test in a logical sequence comparing:

Distal to proximal on each limb (start distally - most sensitive for peripheral neuropathy)
Left vs. right side (compare symmetric areas)
Upper limbs: fingertips → dorsum of hand → forearm → upper arm
Lower limbs: dorsum of toes → dorsum of foot → anterior shin → thigh
Trunk: if a spinal level is suspected, map from numb area upward to find the sensory level

Step 6 - Ask the patient to compare sides

"Does this feel the same as the other side?" A subtle reduction (hypoesthesia) may be noticed by the patient even when they report feeling the touch.

Step 7 - Document findings

Record as: normal, reduced (hypoesthesia), absent (anesthesia), increased (hyperesthesia), or mislocalised.
Map out any sensory loss pattern to determine if it is:
- Glove-and-stocking (peripheral neuropathy)
- Dermatomal (nerve root/spinal cord)
- Hemisensory (cortical or brainstem)

Key Points - Light Touch

Light touch is carried in the dorsal columns (ipsilateral, then crosses at medulla).
Lesions of the dorsal column: light touch and vibration are lost on the same side as the lesion.
Light touch is also partially carried in the anterior spinothalamic tract - this is why light touch is preserved more than pain/temperature in anterolateral (Brown-Séquard) lesions.
Always compare the two sides and check for a sensory level if a spinal cord lesion is suspected.
Harrison's Principles of Internal Medicine 22E

SYSTEM EXAMINATION 2: Pain Sensory Modality

Pathway (Spinothalamic Tract)

Pain (and temperature) travels via small myelinated Aδ and unmyelinated C fibers → enter spinal cord → immediately cross in the anterior commissure → ascend in the contralateral anterolateral spinothalamic tract → thalamus → parietal somatosensory cortex.

How to Test Pain Sensation - Step-by-Step

Equipment needed: A new, sterile neurological pin (disposable pin-prick device) or a fresh clean safety pin. Never reuse pins between patients (infection risk). Dispose of the pin after use.

Step 1 - Explain the procedure

Tell the patient: "I am going to use a pin to test your sensation. You will feel a sharp prick. Please tell me 'sharp' or 'dull' when I touch you, and say if it feels the same on both sides. Close your eyes."

Step 2 - Demonstrate sharp vs. dull

Show the patient the difference between the sharp end and the blunt end of the pin on a normal area (e.g., sternum or unaffected limb) with their eyes open first.
Then ask them to close their eyes for the actual testing.

Step 3 - Apply the stimulus

Apply the sharp end to the skin with just enough pressure to be felt as sharp - do not cause pain or draw blood.
Intermittently use the blunt end as a control to ensure the patient is not guessing.
Apply at irregular intervals.

Step 4 - Systematic testing pattern

Same approach as light touch: distal to proximal, compare left vs. right.
Upper limbs: fingertips → hand → forearm → upper arm
Lower limbs: toes → dorsum foot → shin → thigh
If spinal cord involvement suspected: test the trunk from below upward to find the level; the highest level of normal sensation = the sensory level.

Step 5 - Ask the patient to compare sides and levels

"Is this sharp or dull?"
"Does this feel the same as the other side?"
"Does the sharpness feel equally strong here compared to there?"

Step 6 - Document findings

Normal, hypoalgesia (reduced pain), analgesia (absent pain), hyperalgesia (increased pain), allodynia (pain from normally non-painful touch).
Map the pattern: glove-and-stocking vs. dermatomal vs. hemisensory.

Key Points - Pain Sensation

Pain is carried in the contralateral anterolateral spinothalamic tract - it crosses within 1-2 spinal segments of entry.
In a Brown-Séquard (hemisection of cord) lesion: pain and temperature are lost contralateral to the lesion, while weakness and proprioception are lost ipsilateral.
Always test pain and light touch together - their dissociation is diagnostically important:
- Pain lost + light touch preserved = spinothalamic/anterolateral lesion
- Light touch and vibration lost + pain preserved = dorsal column lesion
- Both lost = complete peripheral neuropathy or complete cord transection.
Harrison's Principles of Internal Medicine 22E, Textbook of Family Medicine 9e

Summary Table

Examination	Modality	Pathway	Equipment	Key Testing Site	Abnormality Pattern
Clubbing	Visual + palpation	-	None	Finger nail beds	Schamroth window sign absent, boggy nail bed, obliterated Lovibond angle
Pallor	Visual inspection	-	None	Palpebral conjunctiva	Pale/white conjunctiva; pale palmar creases
Light Touch	Touch	Dorsal columns (ipsilateral)	Cotton wisp	Distal limbs → proximal	Glove-stocking / dermatomal / hemisensory loss
Pain	Pin-prick	Spinothalamic tract (contralateral)	New sterile pin	Distal limbs → proximal	Contralateral loss in cord lesion; hypoalgesia/analgesia in neuropathy

This is a shared conversation. Sign in to Orris to start your own chat.