Provided clinical history
26 year old man, left thyroid swelling, increasing in size for 7 months. 
Site
Left Thyroid Gland.
Primary image
Low magnification. H&E stain.
| Intermediate magnification  | 
| Intermediate magnification. H&E stain. | 
| High magnification  | 
| High magnification. H&E stain. | 
Differential diagnosis
Additional tests
More history
| More history  | 
| The swelling was nodular, measured 2 cm x 2 cm and was firm, nontender. Serum T3, T4 and TSH were within normal limits. Ultrasound showed a large hypoechoic lesion of 2.1 cm x 2.1 cm in the left lobe of the thyroid with calcification. | 
Ask a colleague
Stains
| | Alcian blue/PAS to Bilirubin | 
|---|
 | | Test | Result | 
|---|
 | Alcian blue/PAS | Dr Torres would ask why! |  | Alican blue pH 1.0 | Dr Torres would ask why! |  | Alcian blue pH 2.5 | Dr Torres would ask why! |  | Auramine | Dr Torres would ask why! |  | Bielchowsky | Dr Torres would ask why! |  | Bilirubin | Dr Torres would ask why! | 
 | 
|---|
 | | Colloidal iron to Fontana-Masson | 
|---|
 | | Test | Result | 
|---|
 | Colloidal iron | Dr Torres would ask why! |  | Congo red | Dr Torres would ask why! |  | Cresyl violet | Dr Torres would ask why! |  | Dieterle | Dr Torres would ask why! |  | Diff Quik | Dr Torres would ask why! |  | Fontana-Masson | Dr Torres would ask why! | 
 | 
|---|
 | | Gallyas to Gremelius | 
|---|
 | | Test | Result | 
|---|
 | Gallyas | Dr Torres would ask why! |  | Giemsa | Dr Torres would ask why! |  | GMS | Dr Torres would ask why! |  | Gomori's trichrome | Dr Torres would ask why! |  | Gram | Dr Torres would ask why! |  | Gremelius | Dr Torres would ask why! | 
 | 
|---|
 | | JMS to Mucicarmine | 
|---|
 | | Test | Result | 
|---|
 | JMS | Dr Torres would ask why! |  | Jones | Dr Torres would ask why! |  | Kinyoun | Dr Torres would ask why! |  | Luxol fast blue | Dr Torres would ask why! |  | Masson trichrome | Dr Torres would ask why! |  | M-MAS | Dr Torres would ask why! |  | Movat | Dr Torres would ask why! |  | Mucicarmine | Dr Torres would ask why! | 
 | 
|---|
 | | Oil red O to Prussian blue | 
|---|
 | | Test | Result | 
|---|
 | Oil red O | Dr Torres would ask why! |  | Orecein | Dr Torres would ask why! |  | PAS | Dr Torres would ask why! |  | PASD | Dr Torres would ask why! |  | PASF | Dr Torres would ask why! |  | PTAH | Dr Torres would ask why! |  | Prussian blue | Dr Torres would ask why! | 
 | 
|---|
 | | Reticulin to Ziehl-Neelsen | 
|---|
 | | Test | Result | 
|---|
 | Reticulin | Dr Torres would ask why! |  | Sudan black B | Dr Torres would ask why! |  | Toluidine blue | Dr Torres would ask why! |  | Verhoeff | Dr Torres would ask why! |  | Von Kossa | Dr Torres would ask why! |  | Warthin-Starry | Dr Torres would ask why! |  | Ziehl-Neeslen | Dr Torres would ask why! | 
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|---|
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IHC
| | Alpha-1 AT to Cathepsin K | 
|---|
 | | Test | Result | 
|---|
 | alpha-1 AT | Dr Torres would ask why! |  | ACTH | Dr Torres would ask why! |  | AE1/AE1 | Dr Torres would ask why! |  | alpha-fetoprotein | Dr Torres would ask why! |  | Alk-I | Dr Torres would ask why! |  | AMACR | Dr Torres would ask why! |  | AR | Dr Torres would ask why! |  | ATRX | Dr Torres would ask why! |  | Beta2-microglobulin | Dr Torres would ask why! |  | B72.3 | Dr Torres would ask why! |  | Beta-catenin | Dr Torres would ask why! |  | BCL2 | Dr Torres would ask why! |  | BCL6 | Dr Torres would ask why! |  | BCLxL | Dr Torres would ask why! |  | C3 comp | Dr Torres would ask why! |  | CA9 | Dr Torres would ask why! |  | Calcitonin | Dr Torres would ask why! |  | Calponin | Dr Torres would ask why! |  | Calretinin | Dr Torres would ask why! |  | CAM5.2 | Dr Torres would ask why! |  | Cathepsin K | Dr Torres would ask why! | 
 | 
|---|
 | | CD10 to Chromogranin | 
|---|
 | | Test | Result | 
|---|
 | CD10 | Dr Torres would ask why! |  | CD117 | Dr Torres would ask why! |  | CD138 | Dr Torres would ask why! |  | CD15 | Dr Torres would ask why! |  | CD1a | Dr Torres would ask why! |  | CD20 | Dr Torres would ask why! |  | CD21 | Dr Torres would ask why! |  | CD23 | Dr Torres would ask why! |  | CD3 | Dr Torres would ask why! |  | CD30 | Dr Torres would ask why! |  | CD31 | Dr Torres would ask why! |  | CD34 | Dr Torres would ask why! |  | CD35 | Dr Torres would ask why! |  | CD4 | Dr Torres would ask why! |  | CD43 | Dr Torres would ask why! |  | CD45 (LCA) | Dr Torres would ask why! |  | CD5 | Dr Torres would ask why! |  | CD56 | Dr Torres would ask why! |  | CD57 | Dr Torres would ask why! |  | CD68 | Dr Torres would ask why! |  | CD7 | Dr Torres would ask why! |  | CD79a | Dr Torres would ask why! |  | CD8 | Dr Torres would ask why! |  | CD99 | Dr Torres would ask why! |  | CDX2 | Dr Torres would ask why! |  | CEA-m | Dr Torres would ask why! |  | Chromogranin | Dr Torres would ask why! | 
 | 
|---|
 | | CK17 to Glypican 3 | 
|---|
 | | Test | Result | 
|---|
 | CK17 | Dr Torres would ask why! |  | CK19 | -ve |  | CK20 | Dr Torres would ask why! |  | CK34betaE12 | Dr Torres would ask why! |  | CK5/6 | Dr Torres would ask why! |  | CK7 | Dr Torres would ask why! |  | CMV | Dr Torres would ask why! |  | c-MYC | Dr Torres would ask why! |  | Cyclin D1 | Dr Torres would ask why! |  | D2-40 | Dr Torres would ask why! |  | Desmin | Dr Torres would ask why! |  | DOG1 | Dr Torres would ask why! |  | EBV | Dr Torres would ask why! |  | EMA | Dr Torres would ask why! |  | ER and PR | Dr Torres would ask why! |  | Factor VIII | Dr Torres would ask why! |  | Factor XIIIa | Dr Torres would ask why! |  | Fascin | Dr Torres would ask why! |  | FH | Dr Torres would ask why! |  | FSH | Dr Torres would ask why! |  | Gastrin | Dr Torres would ask why! |  | GATA3 | Dr Torres would ask why! |  | GCDFP-15 (BRST2) | Dr Torres would ask why! |  | GFAP | Dr Torres would ask why! |  | GH | Dr Torres would ask why! |  | Glucagon | Dr Torres would ask why! |  | Glypican-3 | Dr Torres would ask why! | 
 | 
|---|
 | | HBME-1 to IgM | 
|---|
 | | Test | Result | 
|---|
 | HBME-1 | -ve |  | HBV core | Dr Torres would ask why! |  | HBV surface | Dr Torres would ask why! |  | H-caldesmon | Dr Torres would ask why! |  | HCG | Dr Torres would ask why! |  | Helicobacter | Dr Torres would ask why! |  | Hepatocyte | Dr Torres would ask why! |  | HER2/neu | Dr Torres would ask why! |  | HHV-8 | Dr Torres would ask why! |  | HMB-45 | Dr Torres would ask why! |  | HNF1beta | Dr Torres would ask why! |  | HPV | Dr Torres would ask why! |  | HSV-I | Dr Torres would ask why! |  | HSV-II | Dr Torres would ask why! |  | IDH-1 | Dr Torres would ask why! |  | Inhibin | Dr Torres would ask why! |  | INI1 (BAF47) | Dr Torres would ask why! |  | Insulin | Dr Torres would ask why! |  | Kappa | Dr Torres would ask why! |  | Ki-67 | +ve, strong cell membrane and cytoplasmic positivity |  | Lambda | Dr Torres would ask why! |  | Leu 7 | Dr Torres would ask why! |  | IgA | Dr Torres would ask why! |  | IgG | Dr Torres would ask why! |  | IgM | Dr Torres would ask why! | 
 | 
|---|
 | | LH to PDGFR | 
|---|
 | | Test | Result | 
|---|
 | LH | Dr Torres would ask why! |  | LIN28 | Dr Torres would ask why! |  | Lysozyme | Dr Torres would ask why! |  | mammoglobin | Dr Torres would ask why! |  | MAP2 | Dr Torres would ask why! |  | MCV | Dr Torres would ask why! |  | Melanin A | Dr Torres would ask why! |  | MHC class I | Dr Torres would ask why! |  | MITF | Dr Torres would ask why! |  | MUM1 | Dr Torres would ask why! |  | Myeloperoxidase | Dr Torres would ask why! |  | MYO D1 | Dr Torres would ask why! |  | Myoglobin | Dr Torres would ask why! |  | Napsin | Dr Torres would ask why! |  | NF | Dr Torres would ask why! |  | NKX3.1 | Dr Torres would ask why! |  | NSE | +ve |  | OCT3/4 | Dr Torres would ask why! |  | p16 | Dr Torres would ask why! |  | P501S | Dr Torres would ask why! |  | p53 | Dr Torres would ask why! |  | p57 | Dr Torres would ask why! |  | p63 | -ve |  | Pankeratin | Dr Torres would ask why! |  | PAX2 | Dr Torres would ask why! |  | PAX5 | Dr Torres would ask why! |  | PAX8 | Dr Torres would ask why! |  | PCNA | Dr Torres would ask why! |  | PDGFR | Dr Torres would ask why! | 
 | 
|---|
 | | PLAP to WT1 | 
|---|
 | | Test | Result | 
|---|
 | PLAP | Dr Torres would ask why! |  | PNL-2C | Dr Torres would ask why! |  | Prolactin | Dr Torres would ask why! |  | PSA | Dr Torres would ask why! |  | PSAP | Dr Torres would ask why! |  | RCC | Dr Torres would ask why! |  | S-100 | Dr Torres would ask why! |  | SALL4 | Dr Torres would ask why! |  | Smooth muscle actin | Dr Torres would ask why! |  | Somatostatin | Dr Torres would ask why! |  | STAT6 | Dr Torres would ask why! |  | Synaptophysin | Dr Torres would ask why! |  | TdT | Dr Torres would ask why! |  | TFE3 | Dr Torres would ask why! |  | TFEB | Dr Torres would ask why! |  | Thyroglobulin | +ve |  | Toxoplasma | Dr Torres would ask why! |  | TSH | Dr Torres would ask why! |  | TTF-1 | Dr Torres would ask why! |  | Ubiquitin | Dr Torres would ask why! |  | UCHL1 (PGP9.5) | Dr Torres would ask why! |  | Ulex Europaeus | Dr Torres would ask why! |  | Vimentin | Dr Torres would ask why! |  | VIP | Dr Torres would ask why! |  | VZV | Dr Torres would ask why! |  | WT-1 | Dr Torres would ask why! | 
 | 
|---|
 | 
Chromosomal translocations
| | Translocations Chr 1-10 | 
|---|
 | | Test | Result | 
|---|
 | t(1;13)  PAX7-FKHR | Dr Torres would ask why! |  | t(2,13)  PAX3-FKHR | Dr Torres would ask why! |  | t(8;14)  MYC-IGH | Dr Torres would ask why! |  | t(9;22)  BCR-ABL | Dr Torres would ask why! |  | t(9;22)  CHN-EWS | Dr Torres would ask why! | 
 | 
|---|
 | | Translocations Chr 11-13 | 
|---|
 | | Test | Result | 
|---|
 | t(11;14)  CCND1-IGH | Dr Torres would ask why! |  | t(11;22)  EWS-WT1 | Dr Torres would ask why! |  | t(11;22)  FLI1-EWS | Dr Torres would ask why! |  | t(12;15)  ETV6-NTRK3 | Dr Torres would ask why! |  | t(12;16)  FUS-ATF1 | Dr Torres would ask why! |  | t(12;16)  CHOP-TLS | Dr Torres would ask why! |  | t(12;22)  EWS-ATF1 | Dr Torres would ask why! | 
 | 
|---|
 | | Translocations Chr 14-22 | 
|---|
 | | Test | Result | 
|---|
 | t(14,18)  IGH-BCL2 | Dr Torres would ask why! |  | t(15;17)  PML-RARA | Dr Torres would ask why! |  | t(16;21)  FUS-ERG | Dr Torres would ask why! |  | t(17;22)  COLA1-PDGFB | Dr Torres would ask why! |  | t(21;22)  EWS-ERG | Dr Torres would ask why! | 
 | 
|---|
 | | Translocations Chr X & Y | 
|---|
 | | Test | Result | 
|---|
 | t(X;1) PRCC-TFE3 | Dr Torres would ask why! |  | t(X;17)  TFE3-ASPL | Dr Torres would ask why! |  | t(X;18)  SYT-SSX | Dr Torres would ask why! | 
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|---|
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Diagnosis
Other cases
| |  | 
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 |  |  | Number |  | 
|---|
 |  |  | Subspecialty (Difficulty)
 | 
Autopsy pathology (jr,sr, f/e)
Breast pathology (jr,sr, f/e)
Cardiovascular pathology (jr,sr, f/e)
Cytopathology (jr,sr, f/e)
Dermatopathology (jr,sr, f/e)
Endocrine pathology (jr,sr, f/e)
Forensic pathology (jr,sr, f/e)
Gastrointestinal pathology (jr,sr, f/e)
Genitourinary pathology (jr,sr, f/e)
Gynecologic pathology (jr,sr, f/e)
Hematopathology (jr,sr, f/e)
Head and neck pathology (jr,sr, f/e)
Lymph node pathology (jr,sr, f/e)
Medical kidney pathology (jr,sr, f/e)
Molecular pathology (jr,sr, f/e)
Neuropathology (jr,sr, f/e)
Pediatric pathology (jr,sr, f/e)
Pulmonary pathology (jr,sr, f/e)
Placental pathology (jr,sr, f/e)
Soft tissue pathology (jr,sr, f/e) | 
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 |  |  | Difficulty |  | 
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