Company: MDCXW
Filing Date: 2025-03-28
Form Type: 253G2
Source: 0001062993-25-006502
Chunk: 34

Company: Medicus Pharma Ltd.
Filing Date: 2025-03-28
Form: 253G2
Chunk 34
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 three subjects (01-001, Placebo; 01-008, D-MNA 25 µg and 01-011, D-MNA 50 µg) had differing results when Local/Site evaluation were compared to the Central Reader evaluation. In all three subjects, the Local/Site evaluation noted the presence of residual BCC compared to the Central Reader results which noted no residual BCC for all three subjects. It should be noted that the central reader was blinded to study treatment. In addition, another contributing factor to the noted differences may have been related to different slices of the tumor being evaluated by each of the readers; the local/site reader had the tissue sample obtained at the time of the excision, whereas the Central Reader tissue samples were sliced from the same block for each subject and stained several months later; the slides used in the Local/Site evaluation were not available for reading by the Central Reader. For the secondary endpoint of BCC clinical response, evaluations were performed both at the local/site level as well as independently by a central reader. For the local/site assessment, complete lesion response was observed in one subject each for Placebo, D-MNA 25 µg, D-MNA 100 µg, and D-MNA 200 µg. For D-MNA 50 µg, no subjects were observed to have CR. For the central reader assessment, histopathologic assessment showed six subjects (one Placebo, two D-MNA 25 µg, one D-MNA 50 µg, one D-MNA 100 µg, and one D-MNA 200 µg) with no residual BCC. A "complete response" was considered the absence of BCC in the final excision at 4 weeks. For the Placebo subject (001-003) although it was assessed as a clinical responder according to the local site assessment, the local PI noted a new squamous cell carcinoma in situ (but no residual basal cell carcinoma) that was also confirmed as squamous cell carcinoma by the Central Reader assessment of the end of study excision. Consultants stated that it could be difficult to tell by skin examination alone if there was residual BCC, and that a minority of subjects do not have any residual BCC after having had a biopsy (possibly due in part to local post-procedural inflammatory response). For the exploratory endpoint of quantification of doxorubicin released by the MNAs, doxorubicin delivery was confirmed, but across all dose groups it was observed that