Medical School MD + DO Mastery

A 4-year, board-aligned study system for medical school and licensing exams.

Walk the full Year 1–4 curriculum — foundational sciences, organ-system blocks, clinical clerkships and advanced practice — each with mastery checklists and linked learning resources, plus a dedicated review system for school exams, Shelf/COMAT, USMLE Step 1–3 and COMLEX-USA Levels 1–3.

YEAR 2 SYSTEMS REVIEW - DERMATOLOGY

YEAR 2 | PAGE 50B - PRIMARY MORPHOLOGY -> DISTRIBUTION -> INFLAMMATORY / INFECTIOUS -> BLISTERING / DRUG ERUPTION ->

MALIGNANCY DERM SPINE: DESCRIBE WHAT YOU SEE -> PRIMARY LESION -> COLOR / SCALE / SECONDARY CHANGE -> DISTRIBUTION -> SYSTEMIC / MUCOSAL CLUES -> TEST / BIOPSY -> MANAGEMENT. IMAGE RECOGNITION IS STRONGEST WHEN THE MORPHOLOGY LANGUAGE IS EXPLICIT. D. DERMATOLOGY CLOSED-BOOK REVIEW MAP

LANE	MUST RETRIEVE WITHOUT NOTES	HIGH-DISCRIMINATION TRANSFER
Morphology	Macule/papule/plaque/nodule/vesicle/bulla/pustule; scale/crust/erosion/ulcer; configuration and color.	Name the primary lesion and secondary changes before selecting a diagnosis.
Distribution	Flexural vs extensor, dermatomal, sun-exposed, acral, scalp/nail, mucosal, generalized vs localized.	Distribution often narrows the differential more than one visual buzzword.
Inflammatory / infectious	Psoriasis, eczema, acne, rosacea, cellulitis/impetigo, fungal/viral patterns and systemic inflammatory clues.	Separate noninfectious inflammation from infection before escalating immunosuppression.
Blistering / drug eruptions	Intra- vs subepidermal blistering concepts; urticaria, fixed drug eruption, DRESS, SJS/TEN and mucosal danger.	Mucosal/systemic involvement and skin pain are danger clues that outrank exact rash naming.
Skin cancer	BCC vs SCC vs melanoma; ABCDE, evolution, Breslow depth concept, biopsy and management principles.	For melanoma, depth and suspicious evolution matter more than simply recognizing a dark lesion.

E. TOP 10 MOST-MISSED SYSTEM CONCEPTS - #4 TO #5

# / CONCEPT	DEEP EXPLANATION	WHY STUDENTS MISS IT	EASIEST CLUE
4. Describe the lesion before diagnosing it	Primary morphology plus scale/secondary change and distribution creates a reproducible description that transfers to unfamiliar images. The same disease can look different by skin tone, stage and body site.	Students memorize one canonical photograph and lose the diagnosis when the image changes.	Force yourself to say primary lesion + secondary change + distribution before naming it.
5. Danger clues outrank perfect rash naming	Mucosal involvement, skin pain, fever/toxicity, purpura, rapidly progressive erythema, crepitus, bullae or extensive epidermal loss can signal emergencies such as SJS/TEN, invasive infection or vasculitis.	Visual pattern matching can distract from patient instability and systemic risk.	If there is mucosa, toxicity, pain, purpura, or rapid progression, switch to danger-first reasoning.

F. SUBSTANTIVE DIRECT VIDEOS - DERM + RHEUM BRIDGE

RESOURCE	ROLE IN THIS REVIEW
Osmosis - Systemic Lupus Erythematosus Osmosis - Psoriasis	Immune-complex disease linking skin, kidney, joints, blood and serology. Plaque morphology, distribution, immune mechanism and psoriatic arthritis bridge.
Osmosis - Atopic Dermatitis Ninja Nerd - Skin Cancer \| Clinical Medicine	Barrier/Th2 mechanism, age-distribution patterns and treatment framework. Long-form BCC/SCC/melanoma recognition, biopsy logic and Breslow depth.
AMBOSS USMLE - Dermatology Library / Questions Sketchy Medical	Image-rich targeted repair and board-style vignette application. Selective visual encoding for dermatology/pharmacology associations when a recurring memory gap is documented.

F. SUBSTANTIVE DIRECT VIDEOS - DERM + RHEUM BRIDGE

IMAGE / PRACTICAL GATE	REVIEW RULE
• Describe unfamiliar lesions without relying on the diagnosis name. • Use distribution + systemic clues to separate close mimics.	• Use image sets, not text-only review. • Do not diagnose autoimmune disease from one antibody or rash alone.
• Recognize skin emergencies and malignancy red flags. 2026/27 systems-review expanded edition - align with school objectives and verify official exam updates before testing	• Use visual mnemonics selectively after mechanism and morphology are secure.