Qap (Anatomical Pathology) 

QAP Peer Review

AP339
Case History: M/73. Prostatic TRUS biopsy. Hx of ca prostate and rectal mass.
Intended diagnosis: Malignant melanoma originated from rectum. Contributed by:MST
Code Diagnosis Comment Score
anonymous Malignant melanoma (100 %) nil  100
anonymous DDx melanoma and adenocarcinoma of the prostate with signet-ring cell-like features Do IHC CK and HMB45  80
anonymous MALIGNANT MELANOMA to be confirmed by immunostains and rule out metastatic carcinoma.  100
anonymous Malignant melanoma 100% Confirm with immunohistochemical studies for S100, SOX10. Exclude differential diagnosis of carcinoma with cytokeratin, PSA.  100
anonymous Malignant melanoma. Confirm by S100+ and HMB45+. Carcinoma excluded by CK-. Prostate adenocarcinoma excluded by PSA-. Rectal adenocarcinoma excluded by CDX2-.  100
anonymous Malignant melanoma nil  100
anonymous Prostate - Malignant melanoma 100% Correlate with histology of rectal mass (to ascertain if prostatic melanoma is primary or secondary)  100
anonymous Malignant, favour Melanoma Do immunohistochemical stains S100 protein, HMB-45 and Melan A to confirm  100
anonymous Malignant melanoma nil  100
anonymous Malignant Melanoma, favoring metastasis Need to look for primary  100
anonymous PROSTATE, TRUS biopsy:- MELANOMA nil  100
anonymous Malignant melanoma nil  100
anonymous Malignant melanoma. (100%) nil  100
anonymous malignant, favor melanoma (100%) perform immunostaining (melan A+, cytokeratin -) for confirmation  100
anonymous Malignant melanoma (100% Probability). nil  100
anonymous Malignant rhabdoid tumour (?primary site: colon/ prostate) nil  50
anonymous Malignant melanoma (100%) nil  100
anonymous Prostate, TRUS biopsy - Malignant melanoma. nil  100