Case of the Month
Each Case of the Month is created for pathologists to share interesting cases, to collaborate on research and for educational purposes.
For each case of the month, you can submit your diagnosis. Feedback will be given the following month — once the case has moved to our archives.
If you would like to contribute a case to be featured here as a Case of the Month, please submit it.
Current Pathology Case
Return each month to see our new case study, as well as to find out if your diagnosis was correct!
Archives
- 8-Year-Old Female Presented for Biopsy of a Focal Cluster of Violaceous Papules:
- Final Diagnosis – Acral pseudolymphomatous angiokeratoma.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Acral pseudolymphomatous angiokeratoma.
- 70-Year-Old Man with Weight Loss, Random Biopsies Taken at Colonoscopy:
- Final Diagnosis – Involved by systemic mastocytosis.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Involved by systemic mastocytosis.
- 78-Year-Old Caucasian Male with History of Multiple Non-Melanocytic Skin Cancers:
- Final Diagnosis – Skin, left eyebrow, excision — basosquamous carcinoma involving the deep marginskin and perineurial invasion identified.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Skin, left eyebrow, excision — basosquamous carcinoma involving the deep marginskin and perineurial invasion identified.
- 74-Year-Old Veteran with Past Exposure to Chemicals:
- Final Diagnosis – Moderately hypercellular marrow with multifocal atypical mast cell proliferation.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Moderately hypercellular marrow with multifocal atypical mast cell proliferation.
- 68-Year-Old Male with PMH:
- Final Diagnosis – Skin, excisional biopsies: squamoid eccrine duct carcinoma and foci suspicious for lymphovascular invasion identified.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Skin, excisional biopsies: squamoid eccrine duct carcinoma and foci suspicious for lymphovascular invasion identified.
- 72-Year-Old Male with HGT1 Bladder Ca s/p TURBT + intravesical MMC:
- Final Diagnosis – Mass, testicle and spermatic cord, resection.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Mass, testicle and spermatic cord, resection.
- A 72-Year-Old Female with a Three-Month History of Worsening Headaches:
- Final Diagnosis – Meningioma arising from the basal skull.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Meningioma arising from the basal skull.
- A 39-Year-Old Male Found Unresponsive at Home:
- Final Diagnosis – Benign colloid cyst.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Benign colloid cyst.
- A 31-Year-Old Man with a Painless Lump:
- Final Diagnosis – Malignant germ cell tumors, seminoma and embryonal. The seminoma was 3.8 cm in greatest dimension, and the embryonal carcinoma was 1.5 cm in greatest dimension.
- Read more (PDF).
- Read more (PDF).
- Final Diagnosis – Malignant germ cell tumors, seminoma and embryonal. The seminoma was 3.8 cm in greatest dimension, and the embryonal carcinoma was 1.5 cm in greatest dimension.
- A 62-Year-Old Man with a Neck Mass:
- Final Diagnosis – Dendritic cell neoplasm, favoring interdigitating dendritic cell sarcoma.
- Read more (PDF).
- Final Diagnosis – Dendritic cell neoplasm, favoring interdigitating dendritic cell sarcoma.