Neuroradiologist. MD, PhD, EDiNR Advisory Editorial Committee, @RevistaRADIOLO2 Medical AI trainer
HGUC, Castellón
Joined August 2022
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👩A 34-year-old woman at 32 weeks of gestation, with type 1 diabetes, presents with sudden severe headache, projectile vomiting, right hemiparesis, and speech difficulties. GCS 14/15. No seizures or previous neurological symptoms.
🏥What is your differential diagnosis?
Doc Navarrow retweeted
🧠Anatomical variants of the ACA–AComA complex were found in 34% of 283 patients on CTA. These include A1 hypoplasia or absence, fenestrations, azygos ACA, and triple ACA.
👌Recognizing them is essential for assessing collateral circulation and planning vascular procedures.
dx.doi.org/10.4067/S0717-950…
Not exactly. In unilateral A2 absence, the contralateral ACA supplies both territories. In an azygos ACA, both A1 segments join to form a single midline A2 trunk supplying both hemispheres.
🧠Anatomical variants of the ACA–AComA complex were found in 34% of 283 patients on CTA. These include A1 hypoplasia or absence, fenestrations, azygos ACA, and triple ACA.
👌Recognizing them is essential for assessing collateral circulation and planning vascular procedures.
dx.doi.org/10.4067/S0717-950…
Within the cavernous sinus compartment, but not within the venous lumen. It's normal extravascular adipose tissue located among the neurovascular structures.
✅Juvenile nasopharyngeal angiofibroma.
💡Look for anterior bowing of the posterior maxillary sinus wall (Holman-Miller sign), pterygopalatine fossa widening, and intratumoral flow voids. Avoid biopsy due to hemorrhage risk. Assess skull base and intracranial extension.
doi.org/10.4103/2156-7514.10…
✅Juvenile nasopharyngeal angiofibroma.
💡Look for anterior bowing of the posterior maxillary sinus wall (Holman-Miller sign), pterygopalatine fossa widening, and intratumoral flow voids. Avoid biopsy due to hemorrhage risk. Assess skull base and intracranial extension.
doi.org/10.4103/2156-7514.10…
Doc Navarrow retweeted
👦A 14-year-old boy presents with a 1-year history of progressively enlarging palatal swelling, initially painless, followed by epistaxis, nasal obstruction, dysphagia, and right facial swelling.
🥼What is your differential diagnosis?
Thanks for the addition! hat 2013 morphological classification (megacystic, ring-like, infiltrative, Baló-like) is a good reminder that overall lesion morphology can also carry prognostic value.
Doc Navarrow retweeted
🧠 What imaging patterns should radiologists recognize in autoimmune encephalitis?
This review explores the diverse appearances of AE, from limbic involvement to cortical, basal ganglia, brainstem & cerebellar findings, with key differential diagnoses.
pubs.rsna.org/doi/10.1148/ra…
✅Normal fat deposits in the cavernous sinuses.
💡Seen in 20–27% of patients on CT. They may be more prominent in patients with obesity or Cushing syndrome. When the appearance is characteristic, no MRI or follow-up is needed.
doi.org/10.3174/ajnr.A1398
✅Normal fat deposits in the cavernous sinuses.
💡Seen in 20–27% of patients on CT. They may be more prominent in patients with obesity or Cushing syndrome. When the appearance is characteristic, no MRI or follow-up is needed.
doi.org/10.3174/ajnr.A1398
Doc Navarrow retweeted
Not all enhancement patterns in tumefactive demyelination are equal:
🔄 Open ring → highly specific for demyelination
🧶 Cotton-ball or punctate → consider ADEM or
MOGAD
🟠 Homogeneous or nodular → be cautious, can mimic tumors
doi.org/10.1038/s41598-024-5…
👦A 14-year-old boy presents with a 1-year history of progressively enlarging palatal swelling, initially painless, followed by epistaxis, nasal obstruction, dysphagia, and right facial swelling.
🥼What is your differential diagnosis?
Doc Navarrow retweeted
☎️A resident calls you, concerned about a finding on a head CT.
😓“Should we recommend an MRI to investigate this further?”
What would you do?
✅Cerebral sparganosis.
🐸🧠If you eat frogs, cook them first! Spirometra larvae can survive in the human body for decades, migrating through the brain and leaving inflammatory tunnels behind.
doi.org/10.3174/ajnr.A0659
✅Cerebral sparganosis.
💡Look for tubular or bead-like enhancement, punctate calcifications, and adjacent volume loss rather than mass effect. The tunnel sign reflects larval migration. Lesion migration on serial MRI is a particularly valuable diagnostic clue.
doi.org/10.3174/ajnr.A0659
☎️A resident calls you, concerned about a finding on a head CT.
😓“Should we recommend an MRI to investigate this further?”
What would you do?
Doc Navarrow retweeted
🐸A 45-year-old woman with a 6-year history of severe headaches, intermittent seizures, and right hemiparesis. She reports eating undercooked frog meat 16 years earlier.
🏥What is your differential diagnosis?
Doc Navarrow retweeted
Este artículo de la @RevistaRADIOLO2 recoge las opiniones de 102 radiólogos y residentes españoles sobre la IA en su práctica diaria: el 77% la percibe como una oportunidad para la profesión, con aplicaciones principales en cribado, interpretación de imágenes e informes, aunque la mayor preocupación sigue siendo el aumento de la carga de trabajo
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In English 🔗f.mtr.cool/f1yvbi3s0x
