Richard Evans Zitwer, MD

@JMGardnerMD Great images.

@JMGardnerMD Juvenile psammomatoid ossifying fibroma (JPOF), ethmoid bone.

Can you make diagnosis from one pic, or is it #TooCloseToDiagnose? Answer & more pics: kikoxp.com/posts/10498. #BSTpath #pathologists #pathology #pathTwitter #oralpath #dental #dentist

@pathphyo invasive breast carcinoma and lactating adenoma.

Just a rare combination of invasive breast carcinoma and lactating adenoma in this poor lactating mother. #pathology #breastpath #IDC #Lactating_adenoma #Double_pathology

@Saroja_DeviG @ZuckerPathRes Mesenteric nodule, SIGNET RING CELLS. Permanent sections + IHC confirmed adenocarcinoma with signet ring cell features, consistent with an upper GI tract origin.

Touch prep from a mesenteric nodule during frozen section: check out these remarkable SIGNET RING CELLS. Permanent sections + IHC confirmed adenocarcinoma with signet ring cell features, consistent with an upper GI tract origin. #PathTwitter #CytoPath #PathResident #MedTwitter

@sza_jhcyto @kriyer68 Metastatic "Small Cell Carcinoma" aspirated from the thyroid. Patient had a known history of a "mixed small cell-adenocarcinoma" of the lung. Nice.

IMPRESSIVE cytomorphology of a metastatic "Small Cell Carcinoma" aspirated from the thyroid. Patient had a known history of a "mixed small cell-adenocarcinoma" of the lung. DD would include the uncommon subtype of medullary thyroid carcinoma with small cell features.

@israhkhan @kis_lorand @DZenezan @IACytology @MdTushir @belogrivceva_e @mdlozanoe @pepeheffernan @FirdeMD @DioufaNikolina @Duy45141650 @Arshi_Asma Pleural effusion ,75 year old female ,first time diagnosis by fluid cytology Thin prep slide, cell block(low/high), TTF-1+. Metastatic lung adenocarcinoma.

#cytorocks #cytoweek pleural effusion ,75 year old female ,first time diagnosis by fluid cytology Thin prep slide,cell block(low/high) TTF-1 Metastatic lung adenocarcinoma,can it be anything else ? #pathtwitter

@duckhuca @SansanoValero Typical Carcinoid Tumor. ⬇️ Sub- bronchial lesion. 🈯 Trabecular pattern. 🧂 Salt and pepper chromatin.

🫁 Lobectomy. Central lesion. 🔬 Typical Carcinoid Tumor. ⬇️ Sub- bronchial lesion. 🈯 Trabecular pattern. 🧂 Salt and pepper chromatin. #LungCancer #LungPath #PathTwitter #PathX

@B_C_Dickson @SumantaDas_7 SCLEROSING EPITHELIOID FIBROSARCOMA. IHC: MUC4. NGS: FUS-CREB3L2. NB: this case has so-called 'hybrid' features with low-grade fibromyxoid sarcoma; loose fascicles of spindle-epithelioid cells; bland ovoid nuclei; stroma that ranges from firomyxoid to sclerotic.

SCLEROSING EPITHELIOID FIBROSARCOMA. IHC: MUC4. NGS: FUS-CREB3L2. NB: this case has so-called 'hybrid' features with low-grade fibromyxoid sarcoma; loose fascicles of spindle-epithelioid cells; bland ovoid nuclei; stroma that ranges from firomyxoid to sclerotic.

@kaseyjeanene @M_Jikurashvili SMA diffuse + Glomus Tumor. Finger.

Painful lesion on the finger. One of my favorites 🤩 so cute! SMA diffuse + = Glomus Tumor #pathTwitter #Pathx #MedTwitter #MedX #dermatology #dermpath

@mdlozanoe @EfcsYoung @IACytology @israhkhan @Gloria_SuraMD @tlabiano @IvanaKholova @MozeticV @smlungpathguy @drruizcor @pathologyfinder @sza_jhcyto @DrRanasaleh Small cell lung Ca. Great description.

Clasical cytomorphology of small cell lung Ca ✍️🫁 - scanty or absent cytoplasm -coarse chromatin. Nuclear molding -small/medium cell size -Azzopardi phenomenon (lack of cytoplasm makes the nucleus fragile and ruptures on smearing) -Apoptosis @EfcsYoung @IACytology @israhkhan

@JMGardnerMD Granular cell tumor (with pseudoepitheliomatous hyperplasia mimicking squamous cell carcinoma).

25 F back nodule. Diagnosis? More pics🔬 kikoxp.com/posts/8186 Answer ✅ youtube.com/watch?v=p0fzFi… #pathology #pathologists #pathTwitter #dermpath #dermatology #dermatologia #dermtwitter #BSTpath

@pathphyo Antler horn pattern of ductal epithelial cells in fibroadenoma of breast.

Just typical antler horn pattern of ductal epithelial cells in fibroadenoma of breast. #pathology #breastpath

@JMGardnerMD Plexiform Neurofibroma (NF1 neurofibromatosis). Great video and discussion.

Deep soft tissue mass. WSI digital slide: kikoxp.com/posts/24672 Gross pathology images: kikoxp.com/posts/24674 Answer ✅youtu.be/MPQhKllL2vc #pathology #pathologists #pathTwitter #dermpath #dermatology #dermatologia #dermtwitter #BSTpath

@JMGardnerMD Blastomycosis.

Lung. This is as classic as it gets! More pics: kikoxp.com/posts/10165. Answer (different case, same diagnosis): youtube.com/watch?v=xBJfk4… #pathology #pathologists #pathTwitter #dermpath #dermatology #dermatologia #dermtwitter

@sza_jhcyto single cell pattern is classic for "Gastric" or "Breast Lobular" CA.

ASCITIC fluid with almost complete involvement by malignant cells. The single cell pattern is classic for "Gastric" or "Breast Lobular" CA. (Cytopsin)

@mdlozanoe @sza_jhcyto Single cell pattern in fluids (pleural) is unusual for lung adenocarcinoma, as in this case. TTF1 +

@sza_jhcyto NICE!. Great teaching points ✍️✍️ But nothing (almost) is impossible. Single cell pattern in fluids (pleural) is unusual for lung adenocarcinoma, as in this case. TTF1 +

@Gloria_SuraMD Cerebrospinal fluid revealing metastatic breast cancer.

Cerebrospinal fluid revealing large, mitotically active cells. What is the diagnosis? Answer: buff.ly/3tOGWfM #PathArt #PathTwitter #MedTwitter #CytoPath

@megha_lalcheta Metastasis of Hepatocellular carcinoma to brain, PanCK +, AFP weak +, TTF1 -, PAX8-, Glypican3 -, p63 -, WT1 -, Bhcg -.

Metastasis of Hepatocellular carcinoma to brain PanCK +, AFP weak +, TTF1 -, PAX8-, Glypican3 -, p63 -, WT1 -, Bhcg -, #Hepatocellularcarcinoma #metastasis #pathresidents #pathX #pathology

53/M, Space occupying lesion in left parenchyma of brain #Neuropath #pathX #pathology #pathresidents #brain Diagnosis and IHC markers?

@megha_lalcheta Metastatic adenocarcinoma in left parenchyma of brain.

@JMGardnerMD Invasive Melanoma with tons of pagetoid spread.

Can you make the diagnosis from one pic, or is it #TooCloseToDiagnose? WSI digital slide: kikoxp.com/posts/10777 Answer & explanation: kikoxp.com/posts/10778 Video: kikoxp.com/posts/3764 #pathology #pathologists #pathTwitter #dermpath #dermatology #dermatologia #dermtwitter