Testis

Question 1

benign mimics of malignancy

Answer 1

granulomatous orchitis

malakoplakia

fibrous pseudotumour

adenomatoid tumour

Question 2

malignant mimics of benign

Answer 2

well differentiated liposarcoma

seminoma with extensive granulomas

choriocarcinoma with extensive haemorrhage/necrosis

Question 3

subtle lesions

Answer 3

scar and ITGCN

amyloid

vasculitis

filariasis

Question 4

granulomas

Answer 4

infection

sarcoid

sperm granuloma

non specific granulomatous orchitis (middle aged men with flu-like symptoms, LP infiltrate around tubules)

seminoma

lymphoma

teratoma (keratin granulomas)

Question 5

cystic tumours

Answer 5

cystic dysplasia of rete testis

cystic seminoma

YST

juvenile granulosa cell tumour

Question 6

trabecular/tubular lesions

Answer 6

carcinoid

Sertoli cell tumour

Leydig cell tumour

Question 7

Answer 7

Large cell calcifying Sertoli cell tumour

(assoc with Peutz-Jegher and Carney syndromes)

Question 8

Answer 8

Sclerosing Sertoli cell tumour

Question 9

large cell malignancies

Answer 9

germ cell tumours

lymphoma

metastatic melanoma

metastatic carcinoma

Question 10

Teratomas with somatic malignancy

Answer 10

childhood-type: Ewings, Wilms, RMS

adult-type

Question 11

YST vs juvenile granulosa cell tumour

Answer 11

YST: older children, other YST patterns, AFP+

J-GCT: neonates, inhibin+

Question 12

adenomatoid tumour vs EHE

Answer 12

EHE: vasoformative with vacuolated cells, CD31/34+