Minimum sequnces for shoulder mri

Reading File

Finding Sources

Reading File

Searching PubMed

shoulder MRI protocol sequences

Minimum Sequences for Shoulder MRI

Based on the ESSR (European Society of Skeletal Radiology) Sports Subcommittee 2016 guidelines, the standard/minimum non-arthrogram shoulder MRI protocol consists of 6 sequences:

Sequence	Plane	Purpose
FS PD (fat-suppressed proton density)	Axial	Labrum, biceps tendon, subscapularis
FS PD	Coronal oblique (parallel to supraspinatus)	Rotator cuff (supraspinatus/infraspinatus), AC joint, superior labrum
FS PD	Sagittal oblique (perpendicular to coronal oblique)	Rotator cuff muscle bellies, tendon footprint, cuff tear size
T1 (non-fat-suppressed)	Sagittal oblique	Muscle bulk/fatty atrophy assessment, anatomic detail
T2	Coronal oblique	Fluid-sensitive sequence for tears, effusion, bursitis
GRE 2D or 3D (optional)	Axial	Labral detail, cartilage assessment

Technical parameters (typical): FOV 16 cm, slice thickness 3 mm (2 mm or 1 mm for GRE), matrix 256 x 256, TE 10-40 ms for PD sequences and 80-100 ms for T2.

Key positioning notes

Dedicated shoulder coil at 1.5T or 3T, patient supine, arm in mild external rotation.
Coronal oblique: parallel to the scapula/supraspinatus tendon (defined off the axial images).
Sagittal oblique: perpendicular to the coronal oblique plane, covering from the deltoid to the scapula (to capture rotator cuff muscle bellies).
Axial: from the AC joint down through the axillary pouch.

Why fat suppression matters

FS PD sequences null fat signal to improve contrast between fluid/edema and adjacent fat, which is essential for detecting rotator cuff tears, labral pathology, and bursitis without needing a heavily T2-weighted, longer-acquisition sequence in every plane.

If arthrography is added (MRA)

When capsulolabral pathology (instability, SLAP tears) is the primary concern, a direct MR arthrogram (intra-articular gadolinium) protocol is used instead/in addition, following a similarly structured but arthrogram-specific sequence set per ESSR guidelines - useful because joint distension improves detection of labral tears that a conventional MRI can miss.

Imaging Anatomy Text and Atlas Vol. 3: Bones, Joints, Vessels and Nerves, Table 15.2, p. 453

A note on evidence currency: I ran a targeted search for recent systematic reviews/meta-analyses on shoulder MRI protocols and found nothing that changes this core minimum sequence set (the only relevant recent hit, PMID 40952518, compares MRI vs CT for glenoid bone loss specifically, not general protocol design). The ESSR-based protocol above remains the standard reference.

Plantat aspect swelling differentials

Finding Sources

Searching the Web

plantar aspect foot swelling differential diagnosis mass

Differential Diagnosis: Plantar Aspect Swelling (Sole of Foot)

Swelling on the plantar surface of the foot can be diffuse or localized (a discrete mass). Organizing by category helps narrow the differential:

1. Soft tissue / fascial masses

Plantar fibromatosis (Ledderhose disease) - benign proliferative overgrowth of the plantar aponeurosis; presents as firm, slow-growing nodules in the medial/central arch, often bilateral, more common in men aged 40-60. Usually painless until locally aggressive, then causes pain and swelling on the non-weight-bearing plantar surface. - S Das A Manual on Clinical Surgery
Plantar fascial tear/rupture - occurs during push-off phase of gait; presents with acute swelling, ecchymosis, and pain at the fascia origin (calcaneus). Can mimic fibromatosis on imaging due to scar nodularity. - Rosen's Emergency Medicine
Ganglion/mucoid cyst - soft, fluctuant, slow-growing
Lipoma, fibroma, neurofibroma, leiomyoma - benign soft tissue tumors
Malignant lesions - synovial cell sarcoma, fibrosarcoma, liposarcoma, rhabdomyosarcoma, dermatofibrosarcoma protuberans - suspect with rapid growth, fixation, calcification on X-ray, or aggressive MRI features

2. Inflammatory/degenerative

Plantar fasciitis - tenderness at the medial calcaneal tuberosity (fascia origin); swelling, bruising, weakness, and numbness are uncommon findings, so significant swelling should prompt looking beyond simple fasciitis. - Textbook of Family Medicine, 9e
Retrocalcaneal/plantar bursitis

3. Infectious

Deep plantar space infection/abscess - the plantar space is divided into compartments between the muscle layers; typically follows penetrating trauma, presents with pain, tenderness, and swelling, and can progress to compartment syndrome if untreated. - S Das Manual on Clinical Surgery; Tintinalli's Emergency Medicine
Cellulitis, osteomyelitis (especially in diabetics with plantar ulcers)
Foreign body granuloma - from prior penetrating injury

4. Traumatic

Calcaneal fracture - plantar ecchymosis is a classic sign; marked swelling, gross deformity in severe injuries. - Miller's Review of Orthopaedics
Lisfranc (tarsometatarsal) injury - plantar ecchymosis is characteristic
Plantar plate injury / MTP joint instability - localized swelling at the metatarsal head, positive drawer test

5. Vascular / systemic

Deep venous thrombosis - asymmetric swelling, warmth
Lymphedema - chronic, symmetric or asymmetric, non-pitting over time
Cellulitis vs. DVT vs. systemic edema - symmetric swelling suggests systemic etiology (CHF, renal, hepatic, venous insufficiency); asymmetric points to trauma, DVT, cellulitis, osteomyelitis, or a focal musculoskeletal cause. - Miller's Review of Orthopaedics
Tarsal tunnel syndrome - can cause swelling with associated numbness/paresthesia along tibial nerve distribution

Quick clinical approach

Localized mass vs. diffuse swelling - a discrete nodule favors fibromatosis, cyst, or tumor; diffuse swelling favors infection, trauma, or systemic causes.
History of trauma/penetrating injury - raises concern for fracture, fascial tear, or deep space infection.
Skin changes (warmth, erythema, ulceration) - suggest infection or DVT.
Symmetric vs. asymmetric - symmetric points to systemic causes; asymmetric to local pathology.
Imaging - plain films first for trauma/calcification; MRI is the modality of choice for soft tissue mass characterization (fibromatosis shows intermediate to low T1/T2 signal along the fascia; malignant lesions show more aggressive, heterogeneous signal with possible neurovascular invasion).

Plantar fibromatosis MRI showing mass along plantar fascia

(MRI demonstrating an ill-defined plantar fascia mass consistent with Ledderhose disease - illustrative of a common cause of plantar aspect swelling)

If you can share more clinical context (acute vs. chronic, painful vs. painless, associated trauma, unilateral vs. bilateral, patient risk factors), I can narrow this differential considerably.

Congenital

Finding Sources

Congenital painless bilateral no trauma

Reading File

Finding Sources

Searching the Web

congenital painless bilateral foot swelling differential diagnosis Milroy lymphedema

Given this specific pattern - congenital, painless, bilateral, no trauma - the differential narrows sharply toward primary lymphatic/vascular developmental disorders rather than traumatic or infectious causes.

Leading diagnosis: Milroy Disease (Primary Congenital Lymphedema)

This clinical picture is classic for Milroy disease:

Autosomal dominant, caused by FLT4 (VEGFR3) mutations
Lymphedema present at or before birth, typically bilateral, affecting the dorsum of the feet and lower limbs below the knee
Characteristically painless, non-pitting or minimally pitting
Associated features: hydrocele in males (~37%), prominent superficial veins (~23%), upslanting toenails (~14%), papillomatosis (~10%)
Diagnosis confirmed by lymphoscintigraphy (absent uptake in ilioinguinal nodes) and/or FLT4 genetic testing
Fitzpatrick's Dermatology, Vol. 1-2

Other congenital/developmental differentials to consider

Condition	Distinguishing features
Meige disease (lymphedema praecox)	Most common primary lymphedema, but onset is typically peripubertal rather than at birth; FOXC2 mutation in the distichiasis-associated variant
Klippel-Trenaunay syndrome	Combined capillary-venous-lymphatic malformation causing limb overgrowth, port-wine stains, varicose veins alongside swelling - usually unilateral, not purely bilateral
Lymphatic malformation (LM), isolated	Congenital, can be micro/macrocystic; usually painless unless complicated by infection or bleeding, which can occur suddenly
Lymphedema-distichiasis syndrome	Lymphedema plus aberrant eyelashes (distichiasis), onset often later in childhood/puberty rather than birth
Hennekam lymphangiectasia-lymphedema syndrome	Congenital lymphedema with intestinal lymphangiectasia, facial dysmorphism, intellectual disability
Cholestasis-lymphedema syndrome (Aagenaes syndrome)	Congenital lymphedema plus neonatal cholestasis
Congenital generalized lipodystrophy or macrodystrophia lipomatosa	Localized fatty overgrowth, painless, present from birth, but texture is soft/fatty rather than boggy edema
Turner syndrome	Congenital lymphedema of hands/feet is a recognized neonatal feature, bilateral and painless - look for other stigmata (webbed neck, short stature)
Noonan syndrome	Similar congenital peripheral lymphedema can occur

Key point on Milroy vs. mimics

Because the presentation is congenital, bilateral, and painless with no trauma, the priority workup is:

Family history of lymphedema (autosomal dominant pattern in Milroy)
Check for hydrocele, upslanting toenails, prominent veins
Lymphoscintigraphy to confirm lymphatic dysfunction
Consider genetic testing (FLT4, FOXC2) if syndromic features or family history present
Rule out associated syndromes (Turner, Noonan) with karyotype if dysmorphic features coexist

Harrison's Principles of Internal Medicine, 22nd Ed - Primary Lymphedema classification
Dermatology 2-Volume Set, 5e - Lymphedema chapter

Would you like me to go deeper into the lymphoscintigraphy/diagnostic workup, or into the genetics of Milroy disease specifically?

Non vascular on usg

Finding Sources

Searching the Web

non-vascular lesion on doppler ultrasound differential lymphatic malformation lymphedema soft tissue

Non-Vascular on USG — Refining the Diagnosis

Adding "non-vascular on Doppler USG" to congenital + painless + bilateral + no trauma effectively rules out venous malformations, AVMs, and vascular tumors (hemangiomas), and points toward:

1. Primary Congenital Lymphedema (Milroy disease) — most likely

USG shows diffuse soft tissue/subcutaneous thickening with skin and subcutis edema rather than a discrete mass
No abnormal vascularity on Doppler — this is expected, since lymphedema is a fluid accumulation problem, not a vascular proliferation
Classic "cobblestone" appearance of thickened dermis/subcutis on high-resolution USG
Confirmatory test if needed: lymphoscintigraphy (absent/delayed uptake in ilioinguinal nodes), not USG

2. Lymphatic Malformation (LM) — key non-vascular mimic to distinguish

This is the most important differential to separate from lymphedema on USG, per the imaging literature (AJR - Lymphatic Anomalies in Children):

Macrocystic LM: unilocular/multilocular anechoic or proteinaceous cystic cavities, thin septations, no internal vascularity, easily distinguished from venous malformations
Microcystic LM: often ill-defined, hyperechoic soft-tissue thickening without discrete cysts — can look just like nonspecific edema (this is why it's easily confused with lymphedema clinically and sonographically). Tiny cystic spaces may or may not be visible.
Doppler in both types shows no or minimal internal vascularity, consistent with "non-vascular" — MRI (T2 hyperintense, non-enhancing) is used to clarify extent if USG is equivocal

3. Other non-vascular causes to keep in mind

Condition	USG appearance
Fat necrosis / lipomatous overgrowth	Mixed solid-cystic or hypoechoic mass, no internal vascularity
Plantar fibromatosis (if presenting as localized swelling rather than diffuse)	Hypoechoic, fibrillar mass along plantar fascia, typically hypovascular to avascular on Doppler
Simple/ganglion cyst	Anechoic, well-defined, avascular, posterior acoustic enhancement
Chronic subcutaneous edema (venous/systemic)	Diffuse anechoic/hypoechoic reticular pattern in subcutis without a discrete mass or vascularity

Practical takeaway

"Non-vascular on Doppler" is exactly what you'd expect in both Milroy disease/primary lymphedema and lymphatic malformations — it doesn't distinguish between them on USG alone. The differentiator is morphology:

Diffuse skin/subcutaneous thickening without discrete cysts → favors lymphedema (Milroy)
Discrete cystic spaces (macrocystic) or ill-defined spongy infiltration (microcystic) → favors lymphatic malformation

If the swelling is truly diffuse and symmetric without a discrete cystic component, USG plus the clinical picture (bilateral, present since birth, family history, associated hydrocele/toenail changes) supports Milroy disease as the leading diagnosis. If USG shows cystic spaces or a more localized infiltrative pattern, MRI should follow to characterize a possible lymphatic malformation.

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