Geronimo Junior MD

Página Principal
Brasil
Teresina, PI
Geronimo Junior MD

Informações para nos contatar, mapa e direções, formulário para nos contatar, horário de funcionamento, serviços, classificações, fotos, vídeos e anúncios de Geronimo Junior MD, Médico/a, Teresina.

05/03/2026

Enjoy !

04/03/2026

🎯A case of nasal Rhinosporidiosis in a child.
🧐Sporangium of variable sizes w sporangiospores.

03/03/2026

HIRSCHSPRUNG DISEASE: KEY TIPS & DIAGNOSTIC PITFALLS
🔬 ESSENTIAL TIPS
- Obtain multiple suction biopsies at different levels. One sample can mislead.
- Ensure adequate submucosa (at least ~1/3 of the specimen). No submucosa = no reliable diagnosis.
- Perform calretinin IHC in at least one biopsy. But remember: it evaluates mucosal innervation, not the entire story.
- Look for submucosal nerve hypertrophy, even if ganglion cells are present.
- Intraoperatively: resect at least 5 cm proximal to the first ganglionic level and examine a full circumferential proximal margin (“donut”).
- Always exclude transition zone features:
▸ partial circumferential aganglionosis
▸ myenteric hypoganglionosis
▸ submucosal nerve hypertrophy
⚠️ CLASSIC PITFALLS
- Biopsy too low → physiologic hypoganglionosis near the dentate line may mimic disease.
- Biopsy too high → very short-segment disease may be missed.
- Calretinin positivity does not exclude ultrashort-segment disease (mucosal neurites can extend 1–2 cm distally).
- Mast cells may mimic neurites on calretinin.
- Nerve diameter >40 μm is only useful in infants, misleading in older patients.
- An aganglionic appendix does NOT prove total colonic aganglionosis.

02/03/2026

❎Diagnostic Pitfalls in Diagnosing Dysplasia in Barrett's Esophagus ❎
- Inflammatory atypia: Severe inflammation and ulceration can cause cellular changes that closely mimic high-grade dysplasia.
- Basal metaplastic atypia: Atypia limited to the deep regenerative glands of the mucosa, which exhibits normal maturation as the epithelium extends to the surface.
- Imprecise grading criteria: The subjective challenge of distinguishing high-grade dysplasia from lower grades of neoplasia, where the maintenance or loss of nuclear polarity is the most reliable distinguishing feature.
- Tangential sectioning artifacts: Horizontal sectioning of the tissue can artificially simulate nuclear stratification and elongate cytoplasm, features that can be confused with dysplasia.

Ref: Modern Pathology (2015) 28, 758–765.

28/02/2026

Peritoneal Nodule.
IHC: CD117
Final DX: GIST.

27/02/2026

Peritoneal nodule.
💢What would you add to your IHC panel?
💢Possible diagnoses?

26/02/2026

✔️

25/02/2026

Duodenal amiloidosis.✔️

24/02/2026

A nice gastric tumor in which an important clue is already revealed in the low magnification - Multiple lobules
✅Exclusive gastric location.
✅Most of these tumors occur in childhood
❓Ask me for a marker ❓

23/02/2026

Sometimes you are facing a colonic biopsy with neutrophilic activity, and the question is simple and decisive: is this truly acute, or is there already chronicity?

When Paneth cells appear where they should not (and sometimes just one is enough), they are telling a story — of time, adaptation, and inflammation that was not merely transient.

Distinguishing acute from chronic is not a minor detail. It guides further investigation, follow-up, and clinical management.

A Paneth cell outside its usual territory is a small finding that can shift the entire diagnostic direction.

Stay tuned !

21/02/2026

✅
An interesting case. A young patient underwent a right colectomy with suspected carcinoma. At the level of the ileocecal valve, I found this polypoid lesion containing a cavity with fecaloid material. Microscopically, we see that the wall of the formation preserves intestinal layers.
❓
How would you interpret this?

21/02/2026

Infarct-type necrosis and the zone of hyalinized collagen (HC) - Tip for ddx w tumor cell necrosis.
Recents infarcts: more granulation tissue than HC
If absent - deep cuts (can be focal; Masson stain can help u)
Correlation: antifibrinolytic drug or uterine artey embolization?

Endereço

Teresina, PI
64001330

Site

http://www.lapac-pi.com.br/

Notificações

Seja o primeiro recebendo as novidades e nos deixe lhe enviar um e-mail quando Geronimo Junior MD posta notícias e promoções. Seu endereço de e-mail não será usado com qualquer outro objetivo, e pode cancelar a inscrição em qualquer momento.