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Original Diagnosis

Full processing of skin tissue is available on site.

Our dermatopathologists render a definitive diagnosis for cases ranging from typical to complex. We offer full processing of tissue within Johns Hopkins through the Department of Pathology.

Trained staff receive tissue samples in formalin bottles and immediately accession the sample and paperwork into an electronic system. Next the tissue is placed into cassettes and processed. A paraffin block is made by embedding the tissue in paraffin and then the block is cut and placed onto slides. A staining agent fixes the tissue to the slides which are then slipcovered and read by our dermatopathologists.

A dermatopathologist will read and interpret the slides, and a report is generated electronically. Once the dermatopathologist has finalized the diagnosis report, an automatic fax of the report is sent to the referring physician's fax with results.


To receive requisitions and mailing supplies to submit specimens, please call 410-955-3484. We are glad to mail these supplies to referring physicians' offices and to coordinate mailing services.  You may also conveniently download requisitions for original diagnosis from our website. We ask that you complete the requisition in its entirity to enhance patient safety and speed processing.

Mailing Fresh Tissue Samples

Fresh tissue samples should be submitted by registered mail (not regular mail) to:

Johns Hopkins Dermatopathology Lab
600 N. Wolfe Street, Blalock 907
Baltimore, MD 21287

Please ensure that samples are submitted in formalin bottles with 10% formalin solution, and that the completed requisition is enclosed with each specimen. For patient safety reasons, please complete the requisition in its enterity, and ensure that the requisition information matches bottle labels exactly. 

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